An electric field can deflect_______________?
(A) Neutrons
(B) X-rays
(C) Both glass rod and silk acquire a negative charge
(D) None
Electric flux linked with a surface will be maximum when____________?
(A) The surface is held parallel to the electric field
(B) The surface is held perpendicular to the electric field
(C) The surface makes an angle of 45°with the field
(D) All of the above
The electric lines of force are____________?
(A) imaginary
(B) physically existing every where
(C) physically existing near the charges
(D) depends upon case
If free space between the plates of a capacitor is replaced by a dielectric_____________?
(A) The potential difference remains constant capacittance and energy stored increases
(B) The potential difference remains constant capacittance decreases and energy increases
(C) The potential difference decreases but both capacitance and energy increase
(D) both 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
(C) 90 volts
(D) zero
Potential difference is the work done in moving unit positive charge form one point to another________________?
(A) in the direction of electric intensity
(B) against electric intensity
(C) in any direction
(D) in the direction of electric flux
The value of the capacitance depends upon the________________?
(A) voltage applied
(B) thickness of the capacitor plates
(C) geometry of the capacitor
(D) dinsity of the capacitor plates
A turbine is tripped when ?
(A) inlet pressure increase
(B) speed shoots up
(C) exhaust gets choked
(D) steam flow gets clogged
Which instrument is used to measure the power of electric circuit ?
(A) Wavemeter
(B) Viscometer
(C) Wattmeter
(D) None of these