## Measurement and Instrumentation In a gravity controlled instrument, the deflection angle is proportional

Measurand
Sine inverse of measurand
Square of the measurand
Sine of the measurand

## Measurement and Instrumentation In DC potentiometer measurments, a second reading is often taken after reversing the polarities of the DC supply and the unknown voltage and the average of the two reading is taken. This is with a view of eliminate the effects of

Errorneous standardisation.
Stray magnetic fields.
Stray thermal emfs.
Ripples of the DC supply.

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

## Measurement and Instrumentation A PMMC instrument can be used as flux meter

By using a high series resistance
By using a low resistance shunt
By eliminating the control springs
By making control springs of large moment of inertia

Frequency
Voltage
Current
Resistance

## Measurement and Instrumentation Which of following is a vector quantity?

Relative permeability.
Magnetic field intensity.
Magnetic potential.
Flux density.