................................... transducer requires external power supply for operation.

tick the passive transducers

• strain gauge

• piezoelectric transducer

• bourdan tube

• potentiometer

the approximate value of gauge factor of metals is ............

As length increases, resistance increases

• true

• false

As area increases, resistance increases

• true

• false

Resistivity can be changed by changing the type of ..............

when a tensile force is given

• length increases, area increases

• length increases, area decreases

• length decreases, area increases

• length decreases, area decreases

when a compressive force is given

• length icreases, area increases

• length increases, area decreases

• length decreases, area increases

• length decreases, area decreases

poisson's ratio is given by -()

•  $\frac{\frac{\partial D}{D}}{\frac{\partial L}{L}}$  

•  $\frac{\frac{\partial L}{L}}{\frac{\partial D}{D}}$  

•  $\frac{\frac{\partial R}{R}}{\frac{\partial L}{L}}$  

•  $\frac{\frac{\partial R}{R}}{\frac{\partial D}{D}}$  

Gauge factor equation is:

• $\frac{\Delta R}{R}$

• $1+2\nu$

• Both of these

• None of these