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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

0 W

B

10 W

C

5 W

D

2.5 W

Text Solution

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The correct Answer is:
A
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MOTION-ALTERNATING CURRENT-EXERCISE - 2 (LEVEL - I)
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  2. If I(1), I(2), I(3) " and " I(4) are the respective r.m.s. values of t...

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  3. If instantaneous value of current is I = 10 sin (314 t) A, then the av...

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  5. The emf and the current in a circuit are – E=12sin(100pit),i=4sin(100p...

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  6. The value of alternating e.m.f. is e = 500 sin 100pit, then the freque...

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  10. When 100" volt" dc is applied across a coil, a current of 1 amp flows ...

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  11. A series circuit consists of a resistance, inductance and capacitance....

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  12. Power factor of an L-R series circuit is 0.6 and that of a C-R series ...

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

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  14. A voltage of peak value 283 V and varying frequency is applied to seri...

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  15. The power factor of the circuit in fig. is 1//sqrt(2). The capacitance...

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  16. An L-C-R series circuit with 100Omega resistance is connected to an AC...

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  17. A current of 4A flows in a coil when connected to a 12V DC source. If ...

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  18. A capacitor C=2muF and an inductor with L = 10 H and coil resistance 5...

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  19. Which of the following options are correct :

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