Measurements and Instrumentation

36

The 10 MHz in the specification of CRO means that

A. the sweep frequency is 10 MHz
B. the frequency of input signal should not be more than 10 MHz
C. the vertical amplifier has been designed for 10 MHz
D. none of the above

37

A Weston frequency meter is

A. moving coil instrument
B. moving iron instrument
C. dynamometer instrument
D. induction instrument

38

Assertion (A): The speed of a shaft can be measured by using a dc tacho generator.

Reason (R): A two phase servometer can also be used as a speed transducer.

A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true R is false
D. A is false R is true

39

A resistance strain gauge has a resistance of about

A. 100 Ω
B. 25 Ω
C. 10 Ω
D. 1 Ω

40

For measuring inductance with high Q, we should use

A. Maxwell's bridge
B. Maxwell Wien bridge
C. Hay's bridge
D. Either (a) or (b)