PhysX #1 bugaga

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Question 1 of 40

Consider a graphical representation (Fig.) of simple harmonic motion as described mathematically by equation. When the particle is at point A on the graph, what can you say about its position and
velocity?

Select one of the following:

The position and velocity are both positive
The position and velocity are both negative
The position is positive, and the velocity is zero
The position is positive and the velocity is negative
The position is negative, and the velocity is positive

Explanation

Question 2 of 40

Which of the following statements is not true regarding a mass- spring system that moves with simple harmonic motion in absence of friction?

Select one of the following:

The total energy of the system remains constant
The energy of the system is continually transformed between kinetic and potential energy
The total energy of the system is proportional to the square of the amplitude
The potential energy stored in the system is greatest when the mass passes through the equilibrium position.

Explanation

Question 3 of 40

When a thin uniform stick of mass M and length L is pivoted about its midpoint, its rotational inertia is ML^2/12. When pivoted about a parallel axis through one end, its rotational inertia is:

Select one of the following:

ML^2/12
ML^2/6
ML^2/3
7ML^2/12
13ML^2/12

Explanation

Question 4 of 40

A baseball of mass m is thrown upward with some initial speed. A gravitational force is exerted on the ball

Select one of the following:

At all points in its motion
At all points in its motion except at the highest point
At no points in its motion
Only at downward part of its direction

Explanation

Question 5 of 40

The kinetic friction will always be

Select one of the following:

Greater than static friction
Equal to the static friction
Less than static friction
Negative

Explanation

Question 6 of 40

Centripetal acceleration and tangential acceleration are always __________.

Select one of the following:

Parallel to Each other, but in opposite direction
Perpendicular to each other
None of these
Parallel to Each other, but in the same direction

Explanation

Question 7 of 40

The dimensions of angular momentum are __________.

Select one of the following:

MLT^-1
MLT^-2
ML^2T^-2
ML^2T^-1

Explanation

Question 8 of 40

Two waves have the same frequency. Which wave characteristic must also be identical for both waves?

Select one of the following:

Phase
Amplitude
Intensity
Period

Explanation

Question 9 of 40

A mechanical wave generally does NOT

Select one of the following:

Move the medium from one place to another
Move through a medium
Move through solids
Disturb the medium

Explanation

Question 10 of 40

Which statements are correct?

Select one of the following:

Charges of opposite sign attract one another and charges of the same sign repel one another. Total charge in an isolated system is conserved. Charge is quantized.
Charges of opposite sign repel one another and charges of the same sign attract one another.Total charge in an isolated system is conserved. Charge is quantized.
Charges of opposite sign attract one another and charges of the same sign repel one another. Total charge in an isolated system is not conserved. Charge is quantized
Charges of opposite sign repel one another and charges of the same sign attract one another. Total charge in an isolated system is ot conserved. Charge is not quantized.
No correct answer

Explanation

Question 11 of 40

Which statements are correct?

Select one of the following:

Conductors are materials in which electrons move freely. Insulators are materials in which electrons do not move freely.
Insulators are materials in which electrons move freely. Conductors are materials in which electrons do not move freely.
Conductors are materials in which electrons don’t move freely. Insulators are materials in which electrons move freely.
All answers are correct
No correct answer

Explanation

Question 12 of 40

If the electric field is uniform and makes an angle θ with the normal to a surface of area A, the electric flux through the surface is:

Select one of the following:

Φ = EAcosθ
Φ = EAsinθ
Φ = Acosθsinθ
Φ = Ecosθ
No correct answer

Explanation

Question 13 of 40

A conductor in electrostatic equilibrium has the following properties:

Select one of the following:

1) The electric field is zero everywhere inside the conductor.
2) Any net charge on the conductor resides entirely on its surface.
3) The electric field just outside the conductor is perpendicular to its surface and has a magnitude σ/ε0, where σ is the surface charge density at that point.
4) On an irregularly shaped conductor, the surface charge density is greatest where the radius of curvature of the surface is the smallest.
1) The electric field is zero everywhere inside the conductor.
2) Any net charge on the conductor resides partially on its surface, partially inside the conductor.
3) The electric field just outside the conductor is parallel to its surface and has a magnitude σ/ε0, where σ is the surface charge density at that point.
4) On an irregularly shaped conductor, the surface charge
density is greatest where the radius of curvature of the surface is the smallest.
1) The electric field is non zero everywhere inside the conductor.
2) Any net charge on the conductor resides entirely on its surface.
3) The electric field just outside the conductor is perpendicular to its surface and has a magnitude σ/ε0, where σ is the surface charge density at that point.
4) On an irregularly shaped conductor, the surface charge density is greatest where the radius of curvature of the surface is the biggest.
1) The electric field is zero everywhere inside the conductor.
2) Any net charge on the conductor resides entirely inside the conductor.
3) The electric field just outside the conductor is perpendicular to its surface and has a magnitude σ/ε0, where σ is the surface charge density at that point.
4) On an irregularly shaped conductor, the surface charge density is smallest where the radius of curvature of the surface is the smallest.
No correct answer

Explanation

Question 14 of 40

When a positive test charge q0 is moved between points A and B in an electric field E, the change in the potential energy of the charge–field system is:

Select one of the following:

1
2
3
4
No correct answer

Explanation

Question 15 of 40

The potential difference ΔV between points A and B in an electric field E is defined as:

Select one of the following:

1
2
3
4
No correct answer

Explanation

Question 16 of 40

The potential difference between two points A and B in a uniform electric field E, where s (d=|s|) is a vector that points from A to B and is parallel to E is:

Select one of the following:

ΔV = -Ed
ΔV = 0
ΔV = Ed
ΔV = -Edsinθ
No correct answer

Explanation

Question 17 of 40

Which statements are correct?

Select one of the following:

An equipotential surface is one on which all points are at the same electric potential. Equipotential surfaces are perpendicular to electric field lines.
An equipotential surface is one on which all points are at the same electric potential. Equipotential surfaces are parallel to electric field lines.
An equipotential surface is one on which all points are not at the same electric potential. Equipotential surfaces are perpendicular to electric field lines.
An equipotential surface is one on which all points are at the same electric potential. Equipotential surfaces are perpendicular to gravitation field lines.
No correct answer

Explanation

Question 18 of 40

If we define V = 0 at rA = ∞ the electric potential due to a point charge at any distance r from the charge is:

Select one of the following:

V = kq/r
V = kq^2/r
V = kq/r^2
V = q/r
No correct answer

Explanation

Question 19 of 40

The potential energy associated with a pair of point charges separated by a distance r12 is:

Select one of the following:

1
2
3
4
No correct answer

Explanation

Question 20 of 40

The electric potential due to a continuous charge distribution is:

Select one of the following:

1
2
3
4
No correct answer

Explanation

Question 21 of 40

The electric dipole moment p of an electric dipole has a magnitude:

Select one of the following:

p = 2aQ
p = Q
p = Q^2
p = -2aQ
No correct answer

Explanation

Question 22 of 40

The torque acting on an electric dipole in a uniform electric field E is:

Select one of the following:

τ = pxE
τ = p·E
τ = p/E
τ = qpxE
No correct answer

Explanation

Question 23 of 40

The potential energy of the system of an electric dipole in a uniform external electric field E is:

Select one of the following:

U = - p·E
U = pxE
U = p·E
No correct answer
U = p/E

Explanation

Question 24 of 40

The average current in a conductor is related to the motion of the charge carriers through the relationship:

Select one of the following:

I = nqvA
I = nqv
I = qvA
I = nq/vA
No correct answer

Explanation

Question 25 of 40

Ohm’s law in the differential form is:

Select one of the following:

J = σE
I = U/R
I = R/U
J = σ/E
No correct answer

Explanation

Question 26 of 40

Ohm’s law in the integral form is:

Select one of the following:

J = σE
I = U/R
I = R/U
J = σ/E
No correct answer

Explanation

Question 27 of 40

The power supplied to the element, is:

Select one of the following:

P = IΔV
P = I/ΔV
P = I^2ΔV
P = IΔV^2
No correct answer

Explanation

Question 28 of 40

The power delivered to a resistor can be defined as:

Select one of the following:

P = I^2R
P = IR
P = IR^2
P = I^2/R
No correct answer

Explanation

Question 29 of 40

Circuits involving more than one loop are conveniently analyzed with the use of Kirchhoff’s rules:

Select one of the following:

1) The sum of the currents entering any junction in an electric circuit must equal the sum of the
currents leaving that junction.
2) The sum of the potential differences across all elements around any circuit loop must be zero
1) The product of the currents entering any junction in an electric circuit must equal the
sum of the currents leaving that junction.
2) The sum of the potential differences across all elements around any circuit loop must be constant.
1) The sum of the currents at any circuit loop must be zero.
2) The sum of the potential differences across all elements around any circuit loop must be zero.
1) The sum of the currents entering any junction in an electric circuit must equal the sum of the currents leaving that junction.
2) The product of the potential differences across all elements around any circuit loop must be zero.
No correct answer

Explanation

Question 30 of 40

Two objects, with different sizes, masses, and temperatures, are placed in thermal contact. Energy travels

Select one of the following:

From the larger object to the smaller object
From the object with more mass to the one with less
From the object at higher temperature to the object at lower temperature
Energy doesn’t travel
From the object at lower temperature to the object at higher temperature

Explanation

Question 31 of 40

The second law of thermodynamics can be given as __________

Select one of the following:

For any spontaneous process, the entropy of the universe increases
The entropy of a pure crystalline substance at absolute zero is zero
ΔS = Q/T at constant temperature
ΔE = Q + W

Explanation

Question 32 of 40

How does the internal energy of an ideal gas change as it follows path i->f in figure?

Select one of the following:

E(int) increases
E(int) decreases
E(int) stays the same
There is not enough information to determine how E(int) changes

Explanation

Question 33 of 40

How does the internal energy of an ideal gas as it follows path f->f' along the isotherm labeled T + ΔT in figure ?

Select one of the following:

E(int) increases
E(int) decreases
E(int) stays the same
There is not enough information to determine how E(int) changes

Explanation

Question 34 of 40

Two containers hold an ideal gas at the same temperature and pressure. Both containers hold the same type of gas but container B has twice the volume of container A. The average translational kinetic energy per molecule in container B is

Select one of the following:

Twice that for container A
The same as that for container A
Half that for container A
Impossible to determine.

Explanation

Question 35 of 40

Two containers hold an ideal gas at the same temperature and pressure. Both containers hold the same type of gas but container B has twice the volume of container A. The internal energy of the gas in container B is

Select one of the following:

Twice that for container A
The same as that for container A
Half that for container A
Impossible to determine

Explanation

Question 36 of 40

Two containers hold an ideal gas at the same temperature and pressure. Both containers hold the same type of gas but container B has twice the volume of container A. The rms speed of the gas molecules in container B is

Select one of the following:

Twice that for container A
The same as that for container A
Half that for container A
Impossible to determine

Explanation

Question 37 of 40

The molar specific heat of a gas is measured at constant volume and found to be 11R/2. The gas is most likely to be

Select one of the following:

Monatomic
Diatomic
Monatomic or diatomic, depends on the conditions
Polyatomic
All answers are incorrect

Explanation

Question 38 of 40

Parallel wires carrying currents I1 and I2 respectively

Select one of the following:

Repel if they are directed opposite
Will attract if they are directed opposite
Will not interact

Explanation

Question 39 of 40

A material that can be permanently magnetized is generally said to be

Select one of the following:

Magnetic
Electromagnetic
Permanently magnetic
Ferromagnetic

Explanation

Question 40 of 40

The magnetic flux around a straight currentcarrying wire

Select one of the following:

Gets stronger with increasing distance from the wire
Is strongest near the wire
Does not vary in strength with distance from the wire
Consists of straight lines parallel to the wire

Explanation

Check answer

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	Created by Hanzo Conard over 7 years ago

Quiz

PhysX #1 bugaga

Question 1 of 40

Consider a graphical representation (Fig.) of simple harmonic motion as described mathematically by equation. When the particle is at point A on the graph, what can you say about its position and velocity?

Select one of the following:

Explanation

Question 2 of 40

Which of the following statements is not true regarding a mass- spring system that moves with simple harmonic motion in absence of friction?

Select one of the following:

Explanation

Question 3 of 40

When a thin uniform stick of mass M and length L is pivoted about its midpoint, its rotational inertia is ML^2/12. When pivoted about a parallel axis through one end, its rotational inertia is:

Select one of the following:

Explanation

Question 4 of 40

A baseball of mass m is thrown upward with some initial speed. A gravitational force is exerted on the ball

Select one of the following:

Explanation

Question 5 of 40

The kinetic friction will always be

Select one of the following:

Explanation

Question 6 of 40

Centripetal acceleration and tangential acceleration are always __________.

Select one of the following:

Explanation

Question 7 of 40

The dimensions of angular momentum are __________.

Select one of the following:

Explanation

Question 8 of 40

Two waves have the same frequency. Which wave characteristic must also be identical for both waves?

Select one of the following:

Explanation

Question 9 of 40

A mechanical wave generally does NOT

Select one of the following:

Explanation

Question 10 of 40

Which statements are correct?

Select one of the following:

Explanation

Question 11 of 40

Which statements are correct?

Select one of the following:

Explanation

Question 12 of 40

If the electric field is uniform and makes an angle θ with the normal to a surface of area A, the electric flux through the surface is:

Select one of the following:

Explanation

Question 13 of 40

A conductor in electrostatic equilibrium has the following properties:

Select one of the following:

Explanation

Question 14 of 40

When a positive test charge q0 is moved between points A and B in an electric field E, the change in the potential energy of the charge–field system is:

Select one of the following:

Explanation

Question 15 of 40

The potential difference ΔV between points A and B in an electric field E is defined as:

Select one of the following:

Explanation

Question 16 of 40

The potential difference between two points A and B in a uniform electric field E, where s (d=|s|) is a vector that points from A to B and is parallel to E is:

Select one of the following:

Explanation

Question 17 of 40

Which statements are correct?

Select one of the following:

Explanation

Question 18 of 40

If we define V = 0 at rA = ∞ the electric potential due to a point charge at any distance r from the charge is:

Select one of the following:

Explanation

Question 19 of 40

The potential energy associated with a pair of point charges separated by a distance r12 is:

Select one of the following:

Explanation

Question 20 of 40

The electric potential due to a continuous charge distribution is:

Consider a graphical representation (Fig.) of simple harmonic motion as described mathematically by equation. When the particle is at point A on the graph, what can you say about its position and
velocity?