Measurement and Instrumentation
The given figure shows wein bridge connection for frequency measurement. C and R are variables and gang together. For balanced condition the expression for frequency is f = 1/2πCR when

 R1 = R2.
 R1 = 2R2.
 R1 = R2/2.
 R1 = 3R2.

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
Assertion (A) : It is always desirable to take the reading of an indicating instrument very close to the full scale reading. Reason (R) : Accuracy of an indicating instrument is maximum at the full scale deflection and error increases as reading comes closer to the beginning of the scale.

 Both A and R are true and R is the correct explanation of A
 A is false bur R is true
 Both A and R are true but R is NOT the correct explanation of A
 A is true but R is false

ANSWER DOWNLOAD EXAMIANS APP