148. Which of the following instruments may be used to measure very high frequency small curent?
A. Induction type instrument
B. Moving coil galvanometer
C. Electrodynamic ammeter
D. Thermocouple type instrument
149. The best method of measuring capacitance is
A. CRO method
B. transistor voltmeter method
C. voltmeter-ammeter method
D. ac bridge method
150. The resolution of DVM with 4 digit display is
A. 1/4
B. 1/10001
C.-10000
D.1%
151. The Lissajous pattern obtained on a CRO is used to determine
A. amplitude of applied signal
B. current in a circuit
C. phase shift and frequency
D. distortion in a system
152. A DVM measures
A. peak value
B. rms value
C. peak-to-peak value
D. average value
153. An FET VM employs FETs in
A. cascade mode
B. cascode mode
C. differential mode
D. common mode
154. Accuracy of a digital voltmeter is specified as
A. percentage of the actual reading
B. percentage of the full scale reading
C. number of least significant digits
D. all of these
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