Electrical Engineering MCQs

Page No. 1

A turbine is tripped when ?


ainlet pressure increase


bspeed shoots up


cexhaust gets choked


dsteam flow gets clogged


View Answer speed shoots up

If the distance between the two point charges become half then force between them becomes______________?


adouble


b half


cfour times


dremains same


View Answer four times

The electric charge of 100 °C is 13cm apart from another charge 16.9°C electric force between them is_____________?


a9x107N


b 900N


c 9x105N


d9x106N


View Answer 900N

Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become_____________?


a1/4th of its original value


b1/8th of its original value


c4 times of its original value


d8 times of its original value



An electric field can deflect_______________?


aNeutrons


bX-rays


cBoth glass rod and silk acquire a negative charge


dNone


View Answer None

Electric flux linked with a surface will be maximum when____________?


aThe surface is held parallel to the electric field


bThe surface is held perpendicular to the electric field


cThe surface makes an angle of 45°with the field


dAll of the above



The electric lines of force are____________?


aimaginary


bphysically existing every where


cphysically existing near the charges


ddepends upon case


View Answer imaginary

If free space between the plates of a capacitor is replaced by a dielectric_____________?


aThe potential difference remains constant capacittance and energy stored increases


bThe potential difference remains constant capacittance decreases and energy increases


cThe potential difference decreases but both capacitance and energy increase


dboth potential difference and capacitance decrease but energy increases



A hollow metallic sphere of 8cm diameter is charged with 4 x 10 8C. The potential on its surface will be_________________?


a 900 volts


b 9000 volts


c90 volts


d zero


View Answer 9000 volts

Potential difference is the work done in moving unit positive charge form one point to another________________?


ain the direction of electric intensity


bagainst electric intensity


cin any direction


d in the direction of electric flux



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