Magnetic Field Questions and Answers PDF Download eBook

MCQ: Ratio of magnetic force F_m and electric force F_e acting on a charge getting undeflected through the field is

1. E/B
2. B/E
3. 1
4. 0

MCQ: A disc rolls down from hill at height of 20 m. If disc starts from rest on top of hill, its speed at bottom will be

1. 6.1 m s^-1
2. 16 m s^-1
3. 17 m s^-1
4. 16.1 m s^-1

MCQ: Range of the projectile will be maximum when the angle of the projectile is

1. 30
2. 45
3. 60
4. 90

MCQ: Sunlight is directly converted into electrical energy by using

1. cells
2. solar cells
3. electric generator
4. electrical energy

MCQ: Efficiency of the transformer is defined as

1. (output power/input power) × 100
2. (input power/output power) × 100
3. input power/output power
4. output power × 100