Electrical Eng. · Question Bank

circuits

301 questions · page 10 of 16. Answer in your head first, then check the solution.

#181
The force between two charges placed a given distance apart _____ as the relative permittivity of the medium is increased.
Aincreases
Bdecreases
Cremains unchanged
Dbecomes infinite
#182
Electric field intensity at a point due to a given charge _____ if the relative permittivity of the medium decreases.
Adecreases
Bremains unchanged
Cincreases
Dbecomes zero
#183
The permittivity of a given material is given by one of the following formulas.
ADE
BE/D
CD^2/E
DD/E
#184
What is the other name for dielectric strength?
Abreakdown voltage
Belectric intensity
Cpotential gradient
Ddielectric constant
#185
What is used as the insulating material or dielectric in an electric iron?
Aoiled paper
Bmica
Cparaffin
Dtitanate compound
#186
One farad equals
A1 coulomb/volt
B1 newton/coulomb
C1 newton-meter
D1 volt/second/ampere
#187
Electromotive force in a circuit
Acauses free electrons to flow
Bincreases the circuit resistance
Cmaintains circuit resistance
Dis needed to make the circuit complete
#188
If the length and area of cross-section of a wire are doubled, then its resistance
Abecomes four times
Bbecomes sixteen times
Cremains the same
Dbecomes two times
#189
The temperature coefficient of resistance of a conductor _____ with an increase in temperature.
Aincreases
Bdecreases
Cremains the same
Dbecomes negative
#190
The temperature coefficient of resistance of insulators is
Azero
Bnegative
Cpositive
Dinfinite
#191
The temperature coefficient of resistance of eureka is
Apositive
Bnegative
Calmost zero
Dinfinite
#192
If the value of alpha(o) of a conductor is 1/234 per degree Celsius, then the value of alpha(18) is
A1/218 per degree Celsius
B1/252 per degree Celsius
C1/272 per degree Celsius
D1/273 per degree Celsius
#193
If the value of alpha(25) of a conductor is 1/255 per degree Celsius, then the value of alpha(20) is
A1/300 per degree Celsius
B1/250 per degree Celsius
C1/230 per degree Celsius
D1/260 per degree Celsius
#194
If the value of alpha(50) of a conductor is 1/230 per degree Celsius, then the value of alpha(0) is
A1/180 per degree Celsius
B1/150 per degree Celsius
C1/280 per degree Celsius
D1/230 per degree Celsius
#195
Ohm's law cannot be applied to which material?
Acopper
Bsilver
Csilicon carbide
Daluminum
#196
What is the practical unit of electrical energy?
Awatt
Bkilowatt-hour
Ckilowatt-second
Dmegawatt-hour
#197
The hot resistance of an incandescent lamp is about _____ its cold resistance.
A10 times
B100 times
C5 times
D50 times
#198
Effects of capacitance
AIt opposes any change in the amount of voltage
BVoltage is lagged behind the current by a quarter cycle
CElectric energy is stored in the capacitor in the form of electrostatic field
Dall of them
#199
Points to be considered in choosing a capacitor.
Aworking voltage
Btype of dielectric
Ccapacitance
Dall of them
#200
Permeability is otherwise known as
Amagnetic conductivity
Bmagnetic susceptibility
Celectric conductivity
Delectric susceptibility

More Electrical Eng. topics