PB1.Q.9.iii

When the magnet is entering the coil with its south pole facing downwards, what polarity is induced at the top end of the coil (near A)?

• North

• South

• No polarity

• Alternating North and South

When the magnet is leaving the coil with its south pole facing downwards, what polarity is induced at the top end of the coil (near A)?

• North

• South

• No polarity

• Alternating North and South

When the magnet is entering the coil, the current flows from A to B. When the magnet is leaving the coil, in which direction does the current flow?

• From A to B

• From B to A

• No current flows

• The current direction fluctuates rapidly.

Which of the following laws can be used to determine the direction of the induced current in the coil?

• Ohm's Law

• Lenz's Law

• Newton's Law of Cooling

• Boyle's Law

What is the underlying principle behind the generation of induced current in the coil in this scenario?

• Electrostatic induction

• Electromagnetic induction

• Thermal expansion

• Chemical reaction

Lenz's Law is a consequence of the law of conservation of which of the following?

• Charge

• Momentum

• Energy

• Mass

Which of the following actions would increase the magnitude of the induced current in the coil?

• Using a weaker magnet

• Moving the magnet slower

• Increasing the number of turns in the coil

• Using a coil made of a material with higher resistance.

If the coil is replaced by a wooden ring of same dimensions, then on releasing the magnet along its axis:

• Induced emf will be greater than that produced in the coil

• Induced emf will be lesser than that produced in the coil

• No induced emf will be produced

• Induced emf will be same as that produced in the coil