Q.1.
Write the unit of magnetic flux?
Q.2.
Write the unit of magnetic field intensity?
Q.3.
Write the unit of magnetic flux density?
Q.4.
A moving-coil permanent-magnet instrument can be used as flux meter
Q.5.
To measure radio frequency, the suitable frequency meter is
Q.6.
In a Schering bridge the potential of the detector above earth potential is
Q.7.
________ cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall
Q.8.
The disc of an instrument using eddy current damping should be of
Q.9.
E.m.f. of a Weston cell is accurately measured by
Q.10.
In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was
Q.11.
The switch board instruments
Q.12.
In a Weston synchronoscope, the fixed coils are connected across
Q.13.
An ohmmeter is a
Q.14.
An ammeter is a
Q.15.
Most common form of A.C. meters met with in every day domestic and industrial installations are
Q.16.
Which of the following is measured by using a vector voltmeter ?
Q.17.
A voltage of aboutV can be measured
Q.18.
It is required to measure the true open circuit e.m.f. of a battery. The best device is
Q.19.
To avoid the effect of stray magnetic field in A.C. bridges we can use
Q.20.
The resistance in the circuit of the moving coil of a dynamometer wattmeter should be