Electronic Instruments

1. A CRO is used to measure ___________.

1. Voltage
2. Frequency
3. Phase
4. All of above

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2. A galvanometer in series with a high resistance is called ___________.

1. An ammeter
2. A voltmeter
3. A wattmeter
4. None of the above

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3. A galvanometer of resistance G is shunted by a very small resistance S. The resistance of the resulting ammeter is ___________.

1. GS/(G+S)
2. G+S
3. G-S
4. None of the above

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4. A series ohmmeter circuit uses a 3 V battery and a 1 mA meter movement. What is the half-scale resistance for this movement?

1. 3 kO
2. kO
3. kO
4. 6 kO

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5. 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 ___________.

1. nG
2. G/n
3. G/(n-1)
4. (n-1)G

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6. A voltmeter is connected in a ___________ with the circuit component across which potential difference is to be measured

1. Parallel
2. Series
3. Series or parallel
4. None of the above

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7. A voltmeter should have ___________ resistance

1. Zero
2. Very high
3. Very low
4. None of the above

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8. A VTVM has input resistance than that of a multimeter

1. More
2. Less
3. Same
4. None of the above

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9. A VTVM is never used to measure ___________.

1. Voltage
2. Current
3. Resistance
4. None of the above

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10. 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 ___________.

1. nG
2. (n-1)G
3. G/(n-1)
4. G/n

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