Electric Circuits
A 35 V source is connected to a series circuit of 600 Ω and R as shown. If a voltmeter of internal resistance 1.2 kΩ is connected across 600 Ω resistor, it reads 5 V. The value of R is

 3.6 k Ω.
 7.2 k Ω.
 2.4 k Ω.
 1.2 k Ω.

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Electric Circuits
What is called the instantaneous value of an alternating current?

 The value of peak current at any instant.
 The value of alternating quantity at any instant.
 The value of alternating frequency at any instant.
 The value of peak quantity at any instant.

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