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(A): An AC can be transmitted over long ...

(A): An AC can be transmitted over long distances without much power loss.
(R): An AC can be stepped up or down with the help of a transformer

A

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.

B

Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'

C

'A' is true and 'R' is false

D

Both 'A' and 'R' are false

Text Solution

Verified by Experts

The correct Answer is:
A
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AAKASH SERIES-ALTERNATING CURRENT-EXERCISE - IB
  1. (A) : If an inductor coil is connected in DC source, the current suppl...

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  2. (A) : Current versus time graph is as shown in figure, rms value of cu...

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  3. (A): An AC can be transmitted over long distances without much power l...

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  4. (A) : In L-C-R series AC circuit X(L) = X(C) = R at a given frequeny. ...

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  5. (A) : Inductive reactance of an iductor in DC circuit is zero. (R): ...

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  6. (A): With increase in frequency of an A.C supply, the impedance of an ...

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  7. (A) : An inductor and a capacitor are called low pass filter and high ...

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  8. (A) : The chief characteristic of series resonant circuit is current m...

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  9. (A) : Wires of the transmission lines carrying A.C. are made of multip...

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  10. (A) : The ammeter and voltmeters used for measuring alternating curren...

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  11. (A) : A series resonant circuit is also known as an acceptor circuit. ...

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  12. (A): For a practical choke coil the power factor is very small (R): ...

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  13. (A) : If a current has both ac and de components, then a dc ammeter us...

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  14. (A) : In series LCR circuit, the resonance occurs at one frequency onl...

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  15. (A) : The quantity L//R possesses dimension of time. (R) : To reduce...

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  16. (A) : We use a thick wire in the secondary of a step down transformer ...

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  17. (A): Faraday's laws are consequences of conservation of energy. (R) ...

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  18. (A): No power loss associated with pure capacitor in ac circuit. (R)...

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  19. (A): The alternating current lags behind the e.m.f. by a phase angle o...

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  20. (A): Inductance coils are usually made of thick copper wire. (R) : I...

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