SSC JE Electrical Engineering 2015
For the following questions answer them individually
A 150 V moving iron voltmeter of accuracy class 1.0 reads 75 V when used in a circuit under standard conditions. The maximum possible percentage error in the reading is
A dc voltmeter has a sensitivity of 1000 $$\frac{Ω}{volts}$$ When its measures half full scale in 100 V range, the current through the voltmeter will be
A Lissajous pattern on an oscilloscope has 5 horizontal tangencies and 2 vertical tangencies. The frequency of the horizontal input is 100 Hz. The frequency if the vertical
input will be
The no load input power to a transformer is practically equal to______loss in the transformer
The primary and secondary windings of a transformer are wound on the top of each other in order to reduce.
.The no load primary current $$I_{0}$$, is about______of full load primary current of a transformer.
An eight pole wound rotor induction motor operating on 60 Hz supply is driven at 1800 rpm by a prime mover in the opposite direction of revolving magnetic field. The frequency of rotor current is
.If stator voltage of a squirrel cage induction motor is reduced to 50 percent of its rated value, torque developed is reduced by how many percentage of its full load value?
