Question: 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
Answer:
MCQ: 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
Correct Answer:
A. Should be made of a material having a high resistance temperature co-efficient
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Related Questions
- 1. 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
- 2. 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
- 3. A d’Arsonval movement is rated at 50 µA. its sensitivity is
- 4. 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 :
- 5. A PMMC instrument is spring controlled. The control spring stiffness decreases by about 0.04 percent per °C rise in temperature and the strength of magnets goes down by 0.02 percent per °C rise in temperature. The rise in temperature is 10 °C the deflection
- 6. The power consumption PMMC instrument is typically about :
- 7. In a series type ohmmeter :
- 8. In a series type of ohmmeter the zero adjustment should be done
- 9. A series type ohmmeter is designed with a d’Arsonval movement having full scale current of 0.5 mA and an internal resistance. It uses a battery of 3 V and has a half scale resistance of 3000Ω. The battery voltage goes down to 2.7 V. what is the value of shunt resistance required so that full scale current is obtained if the meter terminals are short circuited?
- 10. A make break switch is provided to disconnect the battery when the meter is not in use in
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