Hi friends, these are some of the multiple choice questions on electrical circuits. These are some of the basic questions which are asked in previous competitive papers check out and comment...
1) A wire of one kilo metre length has a resistance of 20 Q. If the length is halved, then the new resistance is ............... the original resistance.
A) Half
B) Twice
C) One-fourth
D) Three times
Ans:A
2) A series-parallel combination of identical resistors will
A) Increase the power rating compared with one resistor alone
B) Increase the voltage rating compared with one resistor alone
C) Reduce the voltage rating compared with resistor alone
D) Result in an expensive circuit
Ans:A
3) The .......... of an alternating quantity is defined as the fractional part of a period or cycle through which the quantity has advanced from selected origin.
A) Phase
B) Frequency
C) Amplitude
D) Waveform
Ans:A
4) An inductive circuit of resistance 16.5 Q and inductance of 0. 14 H takes a current of 25 A. if the frequency is 50 Hz, find the supply voltage.
A) 1501 V
B) 1174 V
C) 1877 V
D) 991 V
Ans:B
5) Which of the following has a positive temperature coefficient?
A) Mica
B) Manganin
C) Silicon
D) Carbon
Ans:B
6) The ratio of the flux density to the electric field intensity in the dielectric is called
A) Permitivity
B) Field intensity
C) Permeability
D) Elasticity
Ans:A
7) It is impossible to change the voltage across a capacitor instantly, as this would produce .............. current.
A) Infinite
B) Zero
C) Low
D)High
Ans:A
8) Which of the following is not a factor affecting capacitance of a basic capacitor?
A) Area of plates
B) Number of plates
C) Distance between plates
D) Dielectric material used
Ans:B
9) When voltage is applied across a ceramic dielectric the electrostatic field produced is 50 tim es greater than air dielectric. The dielectric constant of ceramic therefore is
A) 50
B) 100
C) 16.67
D) 5
Ans:A
10) The reason why alternating current can induce voltage is
A) It has high peak value
B) It has a stronger magnetic field than direct current
C) It has a constant magnetic field
D) It has a varying magnetic field
Ans:D
If you like my post please share it with your friends and subscribe to latest updates.. If you have doubts you can start new topic on forum and start discussion with our readers..
1) A wire of one kilo metre length has a resistance of 20 Q. If the length is halved, then the new resistance is ............... the original resistance.
A) Half
B) Twice
C) One-fourth
D) Three times
Ans:A
2) A series-parallel combination of identical resistors will
A) Increase the power rating compared with one resistor alone
B) Increase the voltage rating compared with one resistor alone
C) Reduce the voltage rating compared with resistor alone
D) Result in an expensive circuit
Ans:A
3) The .......... of an alternating quantity is defined as the fractional part of a period or cycle through which the quantity has advanced from selected origin.
A) Phase
B) Frequency
C) Amplitude
D) Waveform
Ans:A
4) An inductive circuit of resistance 16.5 Q and inductance of 0. 14 H takes a current of 25 A. if the frequency is 50 Hz, find the supply voltage.
A) 1501 V
B) 1174 V
C) 1877 V
D) 991 V
Ans:B
5) Which of the following has a positive temperature coefficient?
A) Mica
B) Manganin
C) Silicon
D) Carbon
Ans:B
6) The ratio of the flux density to the electric field intensity in the dielectric is called
A) Permitivity
B) Field intensity
C) Permeability
D) Elasticity
Ans:A
7) It is impossible to change the voltage across a capacitor instantly, as this would produce .............. current.
A) Infinite
B) Zero
C) Low
D)High
Ans:A
8) Which of the following is not a factor affecting capacitance of a basic capacitor?
A) Area of plates
B) Number of plates
C) Distance between plates
D) Dielectric material used
Ans:B
9) When voltage is applied across a ceramic dielectric the electrostatic field produced is 50 tim es greater than air dielectric. The dielectric constant of ceramic therefore is
A) 50
B) 100
C) 16.67
D) 5
Ans:A
10) The reason why alternating current can induce voltage is
A) It has high peak value
B) It has a stronger magnetic field than direct current
C) It has a constant magnetic field
D) It has a varying magnetic field
Ans:D
If you like my post please share it with your friends and subscribe to latest updates.. If you have doubts you can start new topic on forum and start discussion with our readers..
EmoticonEmoticon