A electrodynamic ammeter has current flowing through it of 20 A and to – McqOptions

MCQOPTIONS

1.	A electrodynamic ammeter has current flowing through it of 20 A and torsional constant of controlling spring of 10 N-m/degree. If the mutual inductance changes uniformly at the rate of 0.0025 H/degree, then its angular deflection for full scale is
A.	43.68 degree
B.	57.29 degree
C.	68.32 degree
D.	69.69 degree
Answer» C. 68.32 degree

Discussion

No Comment Found

Related MCQs

If a pressure gauge of range 0-10 bar has a quoted inaccuracy of 1.0 % of full scale reading, then it means
To produce a change in deflection of 1.5 mm of the galvanometer of Wheatstone bridge, a change of 5 in the unknown arm of bridge is required. The sensitivity is
A voltmeter of 0 to 250 V has an error of 1% of full scale deflection. If the true voltage of voltmeter is 25 V then the range of its reading is
Four observers recorded a set of current measurement as:
The zero drift is measured in units of
In a hot wire ammeter the current flowing through the resistance of 10 is given by
To convert a 2 mA meter with internal resistance of 120 ohm into an ammeter of range 0 200 mA, the value of shunt resistance required is
For a moving iron ammeter, the change of inductance is 3 H/degree and its spring constant is 4 X 10 N-m/degree. If the maximum deflection of the pointer is 90 degree, then the corresponding current in the coil be
For extending the range of 0-150 V to 0-500 V in a 10000 /V meter, the value of series resistance required is equal to
A current of 2 + 3sin t A is passed through a moving iron instrument and through a PMMC meter respectively. The readings of the two meters are