Technical Test SSC JE: Electrical Engineering (EE)- 4 - Electrical Engineering (EE) MCQ
30 Questions MCQ Test Electrical Engineering SSC JE (Technical) - Technical Test SSC JE: Electrical Engineering (EE)- 4
The charge on an electron is known to be 1.6 × 10–19 coulomb. In a circuit the current flowingis 1A. How many electrons will be flowing through the circuit in a second ?
Pyrometer is used for measurement of
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The voltage and current waveforms for an elements are shown in the figures
The circuit element and its value are
A magnetic ring has a mean circumference of 20 cm and a cross section of 20 cm2 and has 800 numbers of turns of wire. When the exciting current is 5A, the flux is 2 mWb. The relative permeability of iron is nearly
A semiconductor device made out of a material having very high temperature coefficient of resistance is
One single-phase energy meter operating on 230 V and 5A for 5 hours makes 1940 revolution. Meter constant is 400 rev/kWh. The power factor of the load is
In a junction transistor, the collector cut-off current 'ICBO' reduces considerably by doping the
In a D.C. generator all of the following could be the effects of iron losses except
The losses occurring in a D.C. generator are given below which loss is likely to have highest proportion at rated load of the generator
In a D.C. generator the critical resistance can be increased by
A series resonant circuit has an inductive reactance of 1000W, a capacitive reactance of 1000W and a resistance of 0.1W. If resonant frequency is 10 MHz, then the bandwidth of the circuit will be
Consider the network given below
The time constant of the circuit is
Two bulbs marked 200 watt, 250 volts and 100 watt -250 volts are joined in series to 250 volts supply. Power consumed in circuits is
Three equal resistors connected in series across a source of emf together dissipate 10 watts of power. What would be the power dissipated in the same resistors when they are connected in parallel across the same source of emf ?
In a transmission system, the weight of copper used is proportional to
If the frequency of a transmission system is changed from 50 Hz to 100 Hz, the string efficiency will
A piece of silver wire has a resistance of 1W. A manganin wire has specific resistance 30 times that of silver. The resistance of a manganin wire of one fourth length and one third diameter will be
Wattless current is possible, only in
If the stator voltage and frequency of an induction motor are reduced proportionately,its
The efficiency and p.f. of SCIM increases in proportion to its
Which of the following lamp gives nearly monochromatic light ?
A auto transformer used with sodium vapour lamp should have
For supply on 25 kV, 50 Hz single phase, suitable motor for electric traction is
The welding transformer used in resistance welding will
The power factor of the load using welding transformer is usually
Pump, blowers and fans are usually called for
In lap windings, the equalizer rings are used to save
A transformer is considered to have a network of series capacitance due to
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23 videos|89 docs|42 tests
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23 videos|89 docs|42 tests
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