MCQ
Mark out the correct options.
- AAn ammeter should have small resistance.
- BAn ammeter should have large resistance.
- CAvoltmeter should have large resistance.
- ✓Both $(A)$ and $(C)$
✓
Answer
Correct option: D.
Both $(A)$ and $(C)$
d
Smaller the resistance of an ammeter more accurate will be its reading. An ammeter is said to be ideal if its resistance is zero, i.e. it shows actual (value of) current flowing through the circuit. Also, greater the resistance of voltmeter, more accurate will be its reading. A voltmeter is said to be ideal if its resistance is infinite, i.e, it draws no current from the circuit element for its operation. Hence, an ammeter should have small resistance and a voltmeter should have large resistance.
Smaller the resistance of an ammeter more accurate will be its reading. An ammeter is said to be ideal if its resistance is zero, i.e. it shows actual (value of) current flowing through the circuit. Also, greater the resistance of voltmeter, more accurate will be its reading. A voltmeter is said to be ideal if its resistance is infinite, i.e, it draws no current from the circuit element for its operation. Hence, an ammeter should have small resistance and a voltmeter should have large resistance.
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