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Electromagnetic Induction - 04
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Q1. Production of induced e.m.f. in a coil due to the changes of current in the same coil is
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1 point
self induction
mutual induction
dynamo
none of these
Q2. Henry is the S.I. unit of
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1 point
resistance
capacity
inductance
current
Q3. Mutual induction is the production of induced e.m.f. in a coil due to the changes of current in the
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1 point
(a) same coil
(b) neighbouring coil
(c) both (a) and (b)
(d) neither (a) nor (b)
Q4. The self inductance associated with a coil is independent of
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1 point
resistance of coil
induced voltage
time
current
Q5. Eddy currents are produced when
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Through a circular coil, current is passed
A metal is kept in the steady magnetic field
A circular coil is placed in a magnetic field
A metal is kept in varying magnetic field
Q6. Which of the following does not use the application of eddy current ?
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1 point
LED lights
Magnetic brakes in trains
Induction furnace
Electric power meters
Q7. Induction furnace make use of
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1 point
self induction
mutual induction
eddy current
None of them
Q8. The plane in which eddy currents are produced in a conductor is inclined to the plane of the magnetic field at an angle equal to
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1 point
90°
180°
0°
45°
Q9. Which of the following is not the application of eddy currents?
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1 point
speedometer
X-ray crystallography
Induction furnace
Dead beat galvanometer
Q10. Eddy currents do not cause
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1 point
damping
heating
sparking
loss of energy
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