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Electromagnetics (Kahoot Review)

Description

Electromagnetics FInals Period Kahoot Quiz
John Anthony Yumul
Quiz by John Anthony Yumul, updated more than 1 year ago
John Anthony Yumul
Created by John Anthony Yumul over 6 years ago
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Resource summary

Question 1

Question
The electric potential inside an isolated conductor could be ___________
Answer
  • Zero
  • Changing
  • Constant
  • more than one of the choices

Question 2

Question
Pushing a positively charged particle towards another fixed positively charged particle.
Answer
  • exerts negative work
  • exerts positive work
  • exerts no work

Question 3

Question
The electric flux trough a closed surface depends on the following except ________.
Answer
  • magnitude of the charged enclosed by the surface
  • the shape of the surface
  • magnitude of the charged outside the surface
  • more than one of the choices

Question 4

Question
The net torque on a current loop subjected to a magnetic field is _________
Answer
  • never zero
  • always zero
  • sometimes zero
  • cannot be determined

Question 5

Question
The electric field outside a coaxial cable mus be _________
Answer
  • zero
  • maximum
  • same as E field inside the inner conductor
  • more than one of the choices

Question 6

Question
The delayed reaction of the magnetization with the change of magnetizing force is called ______
Answer
  • polarization
  • hysteresis
  • magnetization
  • relaxation time

Question 7

Question
The magnetic force must be zero when the velocity is ________
Answer
  • perpendicular to B
  • zero
  • parallel to B
  • more than one of the choices

Question 8

Question
The electric flux through a surface will be zero when the angle between the electric field and the area unit vector is _______
Answer
  • 0 degrees
  • 30 degrees
  • 180 degrees
  • 90 degrees

Question 9

Question
The polarization vector has the same unit as the __________
Answer
  • electric flux
  • electric field
  • electric flux density
  • electric potential

Question 10

Question
Two parallel wires are said to have one Ampere if the force per unit length experienced by the wire is _________
Answer
  • 2 x 10^-7 N/m
  • 2 x 10^7 N/m
  • 2 x pi x 10^7 N/m

Question 11

Question
The capacitance of an isolated spherical capacitor is independent on its
Answer
  • radius
  • potential
  • charged
  • more than one of the choices

Question 12

Question
The movement of charges in a vacuum
Answer
  • is a form of conduction current
  • does not obey Ohm's law
  • is electrostatically neutral
  • more than one of the choices.

Question 13

Question
Inductors _____________ variations in __________ through a circuit.
Answer
  • oppose; current
  • oppose; voltage
  • aid; current
  • aid; voltage

Question 14

Question
The following are always zero for a conductor in electrostatic equilibrium except
Answer
  • net current
  • net electric field
  • surface charge density
  • potetial difference

Question 15

Question
A material with higher residual magnetism is said to have a good __________, which is the ability to retain magnetism when magnetizing force to removed
Answer
  • hysteresis
  • remanence
  • magnetization
  • dipole moment

Question 16

Question
The energy density of an electric field is ________ the energy density of the magnetic field in a vacuum.
Answer
  • equal to
  • greater than
  • less than

Question 17

Question
Which of the following is a unit of magnetic field intensity?
Answer
  • maxwell
  • tesla
  • gauss
  • oersted

Question 18

Question
If the current in a parallel conductor are the same, the 2 conductors will
Answer
  • attract
  • either repel or attract
  • repel
  • neither attract nor repel

Question 19

Question
If a test charge is moved on an equipotential surface there is
Answer
  • zero work
  • negative work
  • positive work
  • a change in potential energy

Question 20

Question
The charge in the plates of a capacitor establish _____
Answer
  • Current
  • Electric Field
  • Potential difference
  • more than one of the choices

Question 21

Question
With steady electric current, as the velocity increases , the charge density ___________
Answer
  • increases
  • remains the same
  • decreases
  • becomes zero

Question 22

Question
A point charge Qa is moved aong a circular loop around another fixed point charge Qb at a distance of constant radius. The work done is zero ______
Answer
  • when the 2 charges have the same magnitude
  • when the 2 charges have the same poalarity
  • when the 2 charges have opposite polarity
  • all of the choices

Question 23

Question
Resistance depends on the following except
Answer
  • dimension
  • both the choices
  • material
  • neither of the choices

Question 24

Question
The following statements implies that charges are conserved except
Answer
  • charges exist as exact multiple of the charge electron
  • the smallest quantity of charge is the charge of an electron
  • algebraic sum of all charges in a closed system is constant
  • more than one of the choices

Question 25

Question
A flux of 10^-8 weber is passing through a surface. There must be ______ magnetic field line/s passing through it.
Answer
  • 10^8
  • 1
  • 10^-8
  • 0

Question 26

Question
When the charge on the plate increases, the capacitance ______
Answer
  • increases
  • decreases
  • remains the same

Question 27

Question
If the charges are the same, the forces must be ________.
Answer
  • attractive
  • zero
  • repulsive
  • cannot be determined

Question 28

Question
The electric field at 4m due to an infinite sheet of charge is ___________ that of the electric field at 8m.
Answer
  • half
  • twice
  • four times
  • the same

Question 29

Question
COnductance is to electric circuits as _______ is to magnetic circuit
Answer
  • magnemotive force
  • magnetic flux
  • permeance
  • permeability
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