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Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 6
46.

Assertion (A): When frequencies of signals fed to X and Y plates of CRO are multiples of each other, Lissajous pattern is displayed on screen.

Reason (R): In a CRO, the vertical deflection is proportional to voltage applied to Y plates.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
In portable instruments, damping is provided by
spring
gravity
eddy current
either (a) or (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
The sensitivity of electromagnetic digital flow meter can be increased by increasing
circumferential width of rotor teeth
radial depth of rotor teeth
thickness of rotor teeth
number of teeth
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
The increase in intensity of trace in a CRO causes a change in
beam current
frequency of time base
gain of Y amplifier
accelerating voltage
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
A diode peak reading VTVM and thermocouple meter are connected across output of an amplitude modulated circuit. In the absence of modulation both meters read 10 V. When sinusoidal AM is applied, VTVM reads 15V The reading of thermocouple meter will be
10 V
12.5 V
14.1 V
15 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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