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An AC ammeter is used to measure current...

An AC ammeter is used to measure current is a circuit . When a given data current pass through the circuit , the AC ammeter reads 3 A. When another alternating current passes through the circuit, the AC ammeter reads 4A. Then the rading of this ammeter simultaneously is

A

`3 A`

B

`4 A`

C

`7 A`

D

`5 A`

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The correct Answer is:
D
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RESONANCE ENGLISH-ALTERNATING CURRENT-Exercise -1 Part-1
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  4. In the series L-C-R circuit , the voltmeter and ammeter readings are

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  9. A resistor R, an inductor L, a capacitor C and voltmeters V(1),V(2) an...

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  10. A power transformer (step up) with an 1:8 turns ratio has 60 Hz,120 V ...

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  13. The core of a transformer is laminated to reduce

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  15. A choke coil has

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  16. A choke coil is preferred to a rheostate in AC circuit as

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  17. With increase in frequency of an AC supply, the inductive reactance:

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  18. With increase in frequency of an AC supply, the capacitive reactance:

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  19. An AC ammeter is used to measure current is a circuit . When a given d...

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  20. In an a.c. circuit consisting of resistance R and inductance L, the vo...

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