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The potential difference V across and th...

The potential difference `V` across and the current `I` flowing through an instrument in an `AC` circuit are given by:
`V=5 cos omega t` volt
`I=2 sin omega t` Amp.

A

5 watt

B

10 watt

C

2.5 watt

D

0

Text Solution

Verified by Experts

The correct Answer is:
B
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FIITJEE-AC CIRCUITS-ASSIGNMENT PROBLEMS(OBJECTIVE)(level I)
  1. The frequency for which a 5.0 muF capacitor has a reactance of 1000Ome...

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  2. In an a.c. circuit V and I are given by V=50 sin50t volt and I = 100 s...

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  3. Power dissipated in pure inductance will be-

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  4. Circuit as shown in figure below, choose the correct statement

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  5. In a series L, R, C, circuit which is connected to a.c. source. When r...

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  6. An L.C, R series circuit is connected to ac, source. At resonance, the...

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  7. The reciprocal of impedance is called

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  8. The root-mean-square value of an alternating current of 50 Hz frequenc...

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  9. The potential difference V across and the current I flowing through an...

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  10. A resistance (R = 12 omega), an inductor (L = 2 H) and a capacitor (C ...

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  11. Current in LCR ac circuit will be maximum when omega is

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  12. A coil a capacitor and an AC source of rms voltage 24 V are connected ...

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  13. In an L C R circuit having L = 8 H, C = 0 5muF and R=100Omega in serie...

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  14. An LCR circuit is connected to a source of alternating current. At res...

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  15. A 10 ohm resistance, 5 mH coil and 10mu F capacitor are joined in seri...

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  16. In an AC circuit , underset(o)(V) , underset(o)(I) and costheta are vo...

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  17. If a current I given by l(o) sin(omegat-pi//2) flows in an AC circuit ...

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  18. In an AC circuit V and I are given by V = 100 sin 100t V and I = 100 s...

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  19. The average power is dissipated in a pure inductor is

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  20. Using an AC voltmeter, the potential difference in the electrical line...

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