Brightness of a bulb in series with an inductor or capacitor when L, C or frequency changes

1. A.
   frequency of a.c. source is decreased.
2. B.
   number of turns in the coil is reduced.
3. C.
   a capacitance of reactance $X_L - X_C$ is included in the same circuit.
4. D.
   an iron rod is inserted in the coil.

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1. A.
   is increased
2. B.
   is decreased
3. C.
   remains the same
4. D.
   becomes zero

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1. A.
   is reduced, is increased
2. B.
   is reduced, is reduced
3. C.
   is increased, is reduced
4. D.
   is increased, is increased

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1. A.
   an iron rod is inserted in the coil.
2. B.
   frequency of a.c. source is decreased.
3. C.
   number of turns in the coil is reduced.
4. D.
   a capacitance of reactance $\left( X_{C} - X_{L} \right)$ is included in the same circuit.

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1. A.
   is reduced, is reduced
2. B.
   is more, is more
3. C.
   is more, is reduced
4. D.
   is reduced, is more

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1. A.
   is increased
2. B.
   is reduced
3. C.
   remain the same
4. D.
   becomes zero

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1. A.
   frequency of a.c. source is decreased
2. B.
   number of turns in the coil is reduced
3. C.
   an iron rod is inserted in the coil
4. D.
   a capacitance of reactance $X_c$ is included in the same circuit

Tap an option to check your answer.