Category: Electronic instruments

The resistance of an ideal voltmeter is ______________?

Hamad Electronic instruments 10/11/2020

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A. Low
B. Infinite
C. Zero
D. High

A voltmeter is connected in a _____________ with the circuit component across which potential difference is to be measured?

Hamad Electronic instruments 25/10/2020

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A. Parallel
B. Series
C. Series or parallel
D. None of the above

An ammeter is connected in __________ with the circuit element whose current we wish to measure?

Hamad Electronic instruments 09/09/2020

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A. Series
B. Parallel
C. Series or parallel
D. None of the above

Which of the following is likely to have the largest resistance ?

Hamad Electronic instruments 30/08/2020

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A. Voltmeter of range 10 V
B. Moving coil galvanometer
C. Ammeter of range 1 A
D. A copper wire of length 1 m and diameter 3 mm

If the full-scale deflection current of a multimeter is 50 µA, its sensitivity is ________________?

Hamad Electronic instruments 05/08/2020

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A. 10 kO/V
B. 100 kO/V
C. 50 kO/V
D. 20 kO/V

A CRO is used to measure _________________?

Hamad Electronic instruments 30/07/2020

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A. Voltage
B. Frequency
C. Phase
D. All of above

An ammeter has a resistance of G ohms and range of I amperes. The value of resistance required in parallel to convert it into an ammeter of range nI is______________?

Hamad Electronic instruments 16/06/2020

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A. nG
B. (n-1)G
C. G/(n-1)
D. G/n

If the negative potential on the control grid of CRT is increased, the intensity of spot _____________?

Hamad Electronic instruments 02/06/2020

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A. Is increased
B. Is decreased
C. Remains the same
D. None of the above

A voltmeter has a resistance of G ohms and range V volts. The value of resistance required in series to convert it into voltmeter of range nV is________________?

Hamad Electronic instruments 08/05/2020

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A. nG
B. G/n
C. G/(n-1)
D. (n-1)G

A voltmeter should have ____________resistance?

Hamad Electronic instruments 07/05/2020

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A. Zero
B. Very high
C. Very low
D. None of the above