# Induction and Energy Transfers Practice Questions

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Magnetism Learning Material
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Tutorial
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Revision
Questions
16.10Induction and Energy Transfers

## Induction and Energy Transfers Revision Questions

1) What is the magnitude of the uniform magnetic field shown in the figure if the emf induced in the 10cm × 6cm rectangular coil when pulling it completely out of the field is 0.2 V. The entire process lasts for 0.4s.

1. 0.83 T
2. 3.3 T
3. 13.3 T
4. 33.3 T

2) A 36 cm2 square-shaped coil (l = w) is inserted at constant speed (0.2 m/s) inside a 4 T uniform magnetic field. What is the resistance produced in the coil due to the magnetic field if the current induced in the coil is 0.8 A?

1. 0.1 Ω
2. 1.0 Ω
3. 0.048 Ω
4. 0.06 Ω

3) A 50 cm × 40 cm rectangular loop is pulled at constant speed out a 2.0 T uniform magnetic field as shown in the figure.

It takes 5 seconds to the pulling force to shift the coil out of the magnetic field. If the average resistance provided by the coil during this process is 0.8 Ω, calculate the thermal energy transferred to the coil during this process.

1. 0.04 J
2. 0.032 J
3. 0.064 J
4. 0.5 J

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