Question 1 : Voltage induced in secondary coil of transformer is given by__________________
1. N_P*V_P/N_S
2. N_S*V_P/N_P
3. (N_P/V_P)*N_S
4. N_P/(V_P*N_S)
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Question 2 : North pole induces __________
1. Clockwise current
2. Anti-clockwise current
3. Zero current
4. Infinite current
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Question 3 : The emf induced in a coil having N turns is?
1. e=?/t
2. e=N*?/t
3. e=N*?*t
4. e=N²*?*t
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Question 4 : Which, among the following, is the formula for induced emf?
1. e=d? /dt
2. e=dt/d?
3. e=t*?
4. e=t²?
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Question 5 : What is emf?
1. Force
2. Voltage
3. Current
4. Flux
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Question 6 : What does emf stand for?
1. Electronic magnetic force
2. Electromotive force
3. Electromagnetic force
4. Electromated force
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Question 7 : Find the strength of the magnetic field in a conductor 0.5m long moving with a velocity of 10m/s, inducing an emf of 20V if magnetic field, velocity and length of conductor are mutually perpendicular to each other.
1. 1T
2. 2T
3. 3T
4. 4T
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Question 8 : Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V if magnetic field, velocity and length of conductor are mutually perpendicular to each other.
1. 50m
2. 5m
3. 6.25m
4. 0.5m
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Question 9 : If a conductor 0.2m long moves with a velocity of 0.3m/s in a magnetic field of 5T, calculate the emf induced if magnetic field, velocity and length of conductor are mutually perpendicular to each other.
1. 0.3V
2. 0.03V
3. 30V
4. 3V
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Question 10 : The formula for induced emf if magnetic field, length and velocity of conductor all are mutually perpendicular is __________
1. emf=B²l
2. emf=Bil
3. emf=Blv
4. emf=B²v
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