1. A VTVM is never used to measure ______________?
A. Voltage
B. Current
C. Resistance
D. None of the above
✅ The correct answer is option B.
Electronic instruments MCQs
2. The input resistance of a VTVM is about ______________?
A. 1000 O
B. 10 kO
C. 20 kO
D. 10 MO
✅ The correct answer is option D.
3. An ammeter is connected in __________ with the circuit element whose current we wish to measure?
A. Series
B. Parallel
C. Series or parallel
D. None of the above
✅ The correct answer is option A.
4. For display of signal pattern _____________voltage is applied to the horizontal plates of a CRO?
A. Sinusoidal
B. Rectangular
C. Sawtooth
D. None of the above
✅ The correct answer is option C.
5. The sensitivity of a multimeter is given in _______________?
A. O
B. Amperes
C. kO/V
D. none of the above
✅ The correct answer is option C.
6. An ammeter should have_____________ resistance?
A. Infinite
B. Very large
C. Very low
D. None of the above
✅ The correct answer is option C.
7. What is the total resistance of a voltmeter on the 10 V range when the meter movement is rated for 50 µA of full-scale current ?
A. 10 kO
B. 20 kO
C. 200 kO
D. None of the above
✅ The correct answer is option C.
8. When an ammeter is inserted in the circuit, the circuit current will _____________?
A. Increase
B. Decrease
C. Remain the same
D. None of the above
✅ The correct answer is option B.
9. If the full-scale deflection current of a multimeter is 50 µA, its sensitivity is ________________?
A. 10 kO/V
B. 100 kO/V
C. 50 kO/V
D. 20 kO/V
✅ The correct answer is option D.
10. The sensitivity of a voltmeter which uses a 100 µA meter movement is ____________?
A. 1 kO/V
B. 10 kO/V
C. 5 kO/V
D. Data insufficient
✅ The correct answer is option B.