Measurements and Instrumentation


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


A Weston frequency meter is

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


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


A resistance strain gauge has a resistance of about

A. 100 Ω
B. 25 Ω
C. 10 Ω
D. 1 Ω


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)