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WorksheetsELECTROMAGNETIC INDUCTION
Total questions: 20
Worksheet time: 28mins
Which description best applies to Lenz's Law?
An induced current occurs when a magnet passes through a tube.
When a change in magnetic field occurs to a coil the direction of current goes in the in the other direction to this change.
The direction of an induced current is such to align with the change that created it.
A magnet is a tube is always slowed by its magnetic field.
What happens to the galvanometer if the copper rod is moved upwards?
No change
Deflect to the right
Deflect to the left
Deflect to the right and left
Which action will increase the deflection of the galvanometer pointer?
The magnetic pole is reversed
The number of turns of coils is increased
The coil is made from insulated wire
The magnet is slowly pushed into the coil
When a conductor is moved to cut through the magnetic flux, an _______________ is produced.
induced current
electromotive force
electromagnetic induction
internal resistance
The production of electric current by a changing magnetic field is called ____________________________________.
induced current
electromotive force
electromagnetic induction
internal resistance
In Fleming's Right Hand Rule, First finger and center finger represent
current, magnetic field
magnetic field, current
force, current
magnetic field, force
____________law states that the direction of the induced current is such that it always _______ ___ the change producing it.
Lenz's Law, oppose
Faraday's Law, oppose
Lez's Law, follow
Faraday's Law, follow
The d.c generator and a.c generator make use of electromagnetic induction to produce _______________________
force
electricity
energy
power
No EMF is induced when?
When the wire is not moving
When the wire is parallel to magnetic field direction
When no lines are cut by the wire
all of the above
The north pole of a long bar magnet was pushed slowly into a short solenoid connected to a galvanometer. The magnet was held stationary for a few seconds with the north pole in the middle of the solenoid and then withdrawn rapidly. The maximum deflection of the galvanometer was observed when the magnet was
moving towards the solenoid
moving into the solenoid
at rest inside the solenoid
moving out of the solenoid
