WorksheetsPhysics 5470 - Electromagnetic Induction
Total questions: 16
Worksheet time: 8mins
All of the following would increase the voltage induced by the magnet EXCEPT
increasing the speed of the motion
increasing the number of coils of wire
increasing the resistance in the coils
increasing the strength of the magnet
The scenario shown induces a voltage of magnitude V. If the magnet has twice the magnetic field but its motion stopped, how would the induced voltage change?
Voltage would be twice as large in the same direction.
Voltage would be half as large in the same direction.
Voltage would be twice as large in the opposite direction.
No voltage would be induced in the coil.
As the north pole of the magnet is moved into the coil, the magnetic flux is _________.
increasing
decreasing
remains constant
depends on the speed of the magnet
As the north pole of the magnet is moved out of the coil to the left, the magnetic flux is _________.
increasing
decreasing
remains constant
depends on the speed of the magnet
Which of the following would decrease the flux through this wire loop?
decreasing the area of the coil
decreasing the magnetic field of the coil
pulling the coil until it leaves the magnetic field
all of the above
Magnets and coils are moved with velocities shown. Which will NOT induce a voltage in the coil?
The magnetic field enclosed by a 0.5 m2 wire loop increases from 0T to 3T in five seconds. Which of the following could be used to calculate the voltage in the coil?
A 0.2m by 0.3m wire is pulled at 5m/s into a magnetic field of strength 6T. Which of the following could be used to calculate the voltage in the loop?
When a coil enters a magnetic field, it produces a current that is counter-clockwise. Which direction would the current be when the coil exits the field?
Clockwise
Counterclockwise
No current
A wire loop is pulled through a magnetic field that is directed into the page but is neither entering or exiting the field. Which direction is current induced in the coil?
Clockwise
Counterclockwise
No current
A wire loop is pulled out of a magnetic field that is directed into the page. What can be said about the flux and voltage?
Flux is increasing so there is a voltage.
Flux is decreasing so there is a voltage.
Flux is staying constant so there is no voltage.
The magnetic field increases from 0T to 5T in the direction shown. Which statement is true?
The flux is changing so there is both voltage and current.
The flux is not changing so there is neither voltage nor current.
The flux is changing but there is no voltage or current.
The flux is not changing so there is no voltage or current.
The device pictured shows
electrical energy --> kinetic energy
kinetic energy --> electrical energy
electrical energy --> electrical energy
kinetic energy --> kinetic energy
The device pictured best matches the energy transformations of a __________.
transformer
motor
generator
electromagnet
The device pictured is a ______ and its purpose is to ________.
transformer, covert high voltage to low voltage
motor, convert electricity to kinetic energy
generator, convert kinetic energy to electricity
electromagnet, convert current into magnetic field
The device pictured is a ______ and its purpose is to ________.
transformer, covert high voltage to low voltage
motor, convert electricity to kinetic energy
generator, convert kinetic energy to electricity
electromagnet, convert current into magnetic field
