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Electromagnetic Induction - 03
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Q1. If N is the number of turns in a coil, the value of self inductance varies as
*
1 point
N
N^-2
N^0
N^2
Q2. The S, unit of inductance, the henry can be written as
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1 point
weber/ampere
volt second/ampere
joule/ampere^2
all of the above
Q3. The mutual inductance between two coils depends on
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1 point
medium between the coils
separation between the two coils
orientation of the two coils
All of the above
Q4. The polarity of induced emf is given by
*
1 point
Fleming's right hand rule
Biot-Savart law
Ampere's circuital law
Lenz’s law
Q5. The self inductance of a coil is a measure of
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1 point
induced current
induced e.m.f
electrical inertia
electrical friction
Q6. The coils in resistance boxes are made from doubled insulated wire to nullify the effect of
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1 point
pressure
self induced e.m.f.
magnetism
heating
Q7. Two pure inductors each of self inductance L are connected in series, the net inductance is
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1 point
L
2L
L/2
L/4
Q8. The self inductance associated with a coil is independent of
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1 point
current
induced voltage
time
resistance of a coil
Q9. Induction coil is an instrument based on the principle of
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1 point
electromagnetic induction
mutual induction
induction furnace
self induction
Q10. If the magnetic flux linked with a coil through which a current of x A is set up is y Wb, then the coefficient of self inductance of the coil is
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1 point
(x-y) Henry
(x/y) Henry
(y/x) Henry
xy Henry
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