PhysX #1 bugaga

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

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.

ML^2/12

ML^2/6

ML^2/3

7ML^2/12

13ML^2/12

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

Greater than static friction

Equal to the static friction

Less than static friction

Negative

Parallel to Each other, but in opposite direction

Perpendicular to each other

None of these

Parallel to Each other, but in the same direction

MLT^-1

MLT^-2

ML^2T^-2

ML^2T^-1

Phase

Amplitude

Intensity

Period

Move the medium from one place to another

Move through a medium

Move through solids

Disturb the medium

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

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

Φ = EAcosθ

Φ = EAsinθ

Φ = Acosθsinθ

Φ = Ecosθ

No correct answer

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

1

2

3

4

No correct answer

1

2

3

4

No correct answer

ΔV = -Ed

ΔV = 0

ΔV = Ed

ΔV = -Edsinθ

No correct answer

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

V = kq/r

V = kq^2/r

V = kq/r^2

V = q/r

No correct answer

1

2

3

4

No correct answer

1

2

3

4

No correct answer

p = 2aQ

p = Q

p = Q^2

p = -2aQ

No correct answer

τ = pxE

τ = p·E

τ = p/E

τ = qpxE

No correct answer

U = - p·E

U = pxE

U = p·E

No correct answer

U = p/E

I = nqvA

I = nqv

I = qvA

I = nq/vA

No correct answer

J = σE

I = U/R

I = R/U

J = σ/E

No correct answer

J = σE

I = U/R

I = R/U

J = σ/E

No correct answer

P = IΔV

P = I/ΔV

P = I^2ΔV

P = IΔV^2

No correct answer

P = I^2R

P = IR

P = IR^2

P = I^2/R

No correct answer

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

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

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

E(int) increases

E(int) decreases

E(int) stays the same

There is not enough information to determine how E(int) changes

E(int) increases

E(int) decreases

E(int) stays the same

There is not enough information to determine how E(int) changes

Twice that for container A

The same as that for container A

Half that for container A

Impossible to determine.

Twice that for container A

The same as that for container A

Half that for container A

Impossible to determine

Twice that for container A

The same as that for container A

Half that for container A

Impossible to determine

Monatomic

Diatomic

Monatomic or diatomic, depends on the conditions

Polyatomic

All answers are incorrect

Repel if they are directed opposite

Will attract if they are directed opposite

Will not interact

Magnetic

Electromagnetic

Permanently magnetic

Ferromagnetic

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