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Worksheetsmagnetic flux and Faraday's law
Total questions: 10
Worksheet time: 7mins
There are several ways to induce an e.m.f. in a conductor. Which one of these will not work?
Move a wire around a magnet
Place a strong magnet next to a coil
Increase the strength of a magnetic field near a coil
Move a magnet in and out of a coil
Magnetic flux is measured in
teslas
coulombs
webers
farads
The magnitude of the e.m.f. induced in a conductor is proportional to
the change in the flux
the rate of change of flux
the change in the field strength
the rate of change of field strength
The diagram shows a long wire placed in a magnetic field directed out of the screen. Which on of these answers correctly describes the direction of the induced current in the wire when it is moved upwards, and to the right?
Moved upwards: Current to the right
Moved to the right: Current to the left
Moved upwards: No current
Moved to the right: Current to the right
Moved upwards: Current to the right
Moved to the right: No current
Moved upwards: Current to the left
Moved to the right: No current
In the generator shown a coil rotates inside a magnetic field. Which of these factors will not affect the peak e.m.f. of the output of the generator?
The direction of rotation of the coil
The strength of the magnetic field
The length of the wire coil inside the field
The frequency of rotation
In the generator shown a coil rotates inside a magnetic field. Which of these factors will not affect the peak e.m.f. of the output of the generator?
The direction of rotation of the coil
The strength of the magnetic field
The length of the wire coil inside the field
The frequency of rotation
Which line, A to D, gives correct units for both magnetic flux and magnetic flux density?
A
B
C
D
Faraday’s law states that an induced emf is proportional to
The rate of change of the magnetic field
the rate of change of the electric field
the rate of change of the magnetic flux
the rate of change of the electric flux
Which activity will produce the highest current?
Move the magnet bar into the coil while the coil remains stationery
Move the coil into the magnet bar while the magnet remains stationery
Move the coil and magnet towards each other
Move the coil and magnet away from each other
