If the negative potential on the control grid of CRT is increased, the intensity of spot ?
A. Is increased
B. Is decreased
C. Remains the same
D. None of the above
B. Is decreased
Electronic Instruments MCQs
Electronic Instruments MCQs. Multiple Choice Questions and Answers on the topic of Electronic Instruments in the field of Electrical and Electronics Engineering.
To send 10% of the main current through a moving coil galvanometer of resistance 99 O the shunt required is ?
A. 11 O
B. 9 O
C. 100 O
D. 9 O
A. 11 O
An ideal ammeter has ______________ resistance ?
A. Low
B. Infinite
C. Zero
D. High
C. Zero
The horizontal plates of a CRO are supplied with _____________ to observe the waveform of signal ?
A. Sinusoidal wave
B. Cosine wave
C. Sawtooth wave
D. None of the above
C. Sawtooth wave
If 2% of the main current is to be passed through a galvanometer of resistance G, then resistance of the shunt required is ?
A. G/50
B. G/49
C. 49 G
D. 50 G
B. G/49
The most accurate device for measuring voltage is ?
A. Voltmeter
B. Multimeter
C. CRO
D. VTVM
C. CRO
The material used to coat inside the face of CRT is ?
A. Carbon
B. Sulphur
C. Silicon
D. Phosphorous
D. Phosphorous
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
B. 10 kO/V
A galvanometer of resistance G is shunted by a very small resistance S. The resistance of the resulting ammeter is ?
A. GS/(G+S)
B. G+S
C. G-S
D. None of the above
A. GS/(G+S)
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
C. Sawtooth