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Which current do not change direction wi...

Which current do not change direction with time?

A

DC current

B

AC current

C

Both (a) and (b)

D

Neither (a) nor (b)

Text Solution

Verified by Experts

The correct Answer is:
A
DC currents does not change direction with time. But voltages and currents that vary with time are very common.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTROMAGNETIC INDUCTION-Example 1
  1. By what percentage the impedance in an AC series circuit should be inc...

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  2. The maximum value of a.c. voltage in a circuit is 707 V . Its rms valu...

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  3. Which current do not change direction with time?

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  4. Which of the following represents the value of voltage and current at ...

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  5. A 60muF capacitor is connected to a 110V, 60 Hz AC supply determine th...

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  6. A group of electric lamps having total power rating of 600 W, 200 V is...

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  7. In an AC circuit the instantaneous values of emf and current are e=2...

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  8. The peak value of 220 a.c. is

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  9. Alternating current can not be measured by D.C. Ammeter because

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  10. An AC source is 120 V-60 Hz. The value of voltage after 1/720 s from...

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  11. The instantaneous voltage through a device of impendance 20 Omega is V...

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  12. For a given ac i=imsinomegat, show that the average power dissipated i...

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  13. If the frequency is doubled, what happens to the capacitive reactance ...

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  14. Voltage and current in an ac circuit are given by V=5 sin (100 pi t-...

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  15. To express AC power in the same from as DC power, a special value of c...

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  16. A light bulb is rated at 100 W for a 220 V ac supply . The resistance ...

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  17. The peak vlaue of alternating current is 5sqrt(2). The mean square val...

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  18. If reading of an ammeter is 10 A, the peak value of current is

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  19. For high frequency, a capacitor offers

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  20. Alternating current is transmitted to distant places at

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