Question: A Voltmeter has a resistance of 2000Ω. When it is connected across a d.c circuit its power consumption is 2 mW. Suppose this voltmeter is replaced by a voltmeter of 4000 Ω resistance, the power consumption will be ________The circuit condition remains undisturbed.
Answer:
MCQ: A Voltmeter has a resistance of 2000Ω. When it is connected across a d.c circuit its power consumption is 2 mW. Suppose this voltmeter is replaced by a voltmeter of 4000 Ω resistance, the power consumption will be ________The circuit condition remains undisturbed.
Correct Answer:
A. 4 mW
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Related Questions
- 1. A milliammeter of resistance 100Ω is connected in series with a circuit. Its power consumption is 0.1 mW. Supposing it is replaced with a milliammeter of 200Ω resistance the power consumption will be
- 2. The high torque to weight ratio in an analog indicating instrument indicates:
- 3. A PMMC instrument produces a deflection of 90° when a current 2 mA passes through its moving coil. The instrument is spring controlled. Suppose the instrument is redesigned with its spring constant as before, and its permanent magnet is replaced with a new permanent magnet which produces twice the flux density as before. what would be the deflection if a current of 1 mA is passed through the coil ? The other features of the PMMC instrument remain the same.
- 4. A 1 mA ammeter has a resistance of 100 Ω.it is to be converted to a 1 A ammeter. The value of shunt resistance is :
- 5. Swamping resistance is connected
- 6. In order to reduce errors on account of temperature, instruments are provided with shunts use series connected swamping resistance. In order that errors on account temperature changes be low, the swamping resistance
- 7. A 4-range milliammeter having ranges of 0-10 mA, 0-50 mA, 0-100mA and 0-500 mA. It is used for measurement of current whose magnitude is not known. In order to prevent damage to the instrument, the selector switch of the ammeter should be first placed at
- 8. A 1 mA d’Arsonval movement has a resistance of 100Ω. It is to be converted to a 10 V voltmeter. The value of multiplier resistance is
- 9. A d’Arsonval movement is rated at 50 µA. its sensitivity is
- 10. A d’Arsonval movement has a sensitivity of 40,000 Ω and its internal resistance is 4000 Ω. The resistance of multiplier to convert it to 1V voltmeter is :
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