Physics · Torque experienced by a current loop in a uniform magnetic field: Moving coil galvanometer, its sensitivity and conversion to ammeter and voltmeter
Assertion A galvanometer can be used as a voltmeter to measure the voltage acros
Assertion A galvanometer can be used as a voltmeter to measure the voltage across a given section of the circuit. Reason For this it must be connected in parallel with that section of the circuit.
- A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
- B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
- C. Assertion is correct but Reason is incorrect
- D. Both Assertion and Reason are incorrect
Step-by-step solution
A galvanometer can be converted into a voltmeter by connecting a high resistance in series, and a voltmeter is always connected in parallel with the circuit section to measure voltage. The assertion is true, and the reason (parallel connection) is also true for a voltmeter, but the reason does not explain how a galvanometer is used as a voltmeter (which requires a series resistor). Hence, option B is correct.
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