SSC JE Electrical Engineering 2015

Instructions

For the following questions answer them individually

Question 191

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

Question 192

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

Question 193

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


Question 194

The no load input power to a transformer is practically equal to______loss in the transformer

Question 195

The primary and secondary windings of a transformer are wound on the top of each other in order to reduce.

Question 196

Leakage flux in a transformer occurs because


Question 197

.The no load primary current $$I_{0}$$, is about______of full load primary current of a transformer.

Question 198

Which of the following Braking is not suitable for motors?

Question 199

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


Question 200

.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?

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