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Electric Circuits

Electric Circuits
For the circuit shown below the value of R is adjusted so as to make the current in RL equal to zero. Calculate the value of R.

 2 Ω.
 3 Ω.
 1 Ω.
 4 Ω.

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Electric Circuits
Emf induced in a coil rotating in a uniform magnetic field will be maximum when the

 flux linking with the coil is maximum.
 rate of cutting flux by coil sides is minimum.
 rate of change of flux linkage is minimum.
 rate of change of flux linkage is maximum.

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Electric Circuits
Resistor stores the energy in the form of

None of these
 magnetic field.
 electrical field.
 both A and B.

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Electric Circuits
1 F is theoretically equal to

 1 ohm of resistance
 none of these
 ratio of 1 V to 1 C
 ratio of 1 C to 1 V

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Electric Circuits
An electrical circuit with 10 branches and 7 nodes will have

  4 loop equations.
  10 loop equations.
 7 loop equations.
 3 loop equations.

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Electric Circuits
The hot resistance of a tungsten lamp is about 10 times the cold resistance. Accordingly, cold resistance of a 100 W, 200 V lamp will be

 4 Ω.
  40 Ω.
 400 Ω.
 800 Ω.

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