The thermocouple instruments do not have
1). High sensitivity
2). Absence of frequency error
3). Independent of the ambient temperature
4). High degree of measuring accuracy
The material of hairspring used in measuring instruments is made of which of the material of the following:
1). Copper
2). Bronze
3). Alnico
4). None of these
In an Induction type meter, maximum torque is produced when the phase angle between two fluxes is
1). 0°
2). 45°
3). 60°
4). 90°
In dynamometer wattmeter the compensation coil
1). Has an equal number of turns of voltage coil and is connected in series with the current coil
2). Has an equal number of turns of the current coil and is connected in series with voltage coil
3). Has an equal number of turns of the current coil and is connected in series with the current coil
4). Has an equal number of turns of voltage coil and is connected in series with voltage coil
The shunt used in milliammeter
1). will extend the range and reduce the meter resistance
2). will extend the range and increase the meter resistance
3). will decrease the range and meter resistance
4). will not affect the meter