Free MCQs & Online Quiz Practice for Exams

Q: A capacitor C has a charge Q. The actual charges on its plates are

A) +Q and +Q

B) +Q and -Q

C) Q/2 and Q/2

D) 0 and Q

Q: Unit of current is?

A) Ampere

B) Volt

C) Ohm

D) Coulomb

Q: Two 1Ω resistors in series have equivalent resistance?

A) 1Ω

B) 2Ω

C) 0.5Ω

D) 4Ω

Q: Two 1Ω resistors in parallel have equivalent resistance?

A) 1Ω

B) 2Ω

C) 0.5Ω

D) 4Ω

Q: If voltage is constant, increasing resistance does what to current?

A) Increases

B) Decreases

C) Remains same

D) Zero

Q: Battery rated in ampere-hour measures? it is the unit of ____

A) Charge

B) Current

C) Power

D) Energy

Q: Ohm’s law relates which of the following quantities in an electrical circuit?

A) Voltage and current

B) Current and resistance

C) Voltage, current, and resistance

D) Voltage and resistance

Q: Unit of electric potential is?

A) Coulomb

B) Volt

C) Farad

D) Ampere

Q: A current-carrying wire experiences force in a magnetic field if?

A) Current perpendicular to B

B) Current parallel to B

C) Wire stationary

D) No magnetic field

Q: Unit of magnetic field is?

A) Tesla

B) Volt

C) Ampere

D) Ohm

Q: Increasing speed of magnet through coil?

A) Increases induced voltage

B) Decreases induced voltage

C) Voltage constant

D) No voltage

Q: Slip rings are part of?

A) AC generator

B) DC motor

C) Transformer

D) Magnet

Q: Direction of magnetic field around wire is given by?

A) Right hand rule

B) Left hand rule

C) Fleming's rule

D) Faraday's law

Q: Electromagnetism explains?

A) Induction

B) Reflection

C) Refraction

D) Diffraction

Q: A current carrying wire in which current flows in northward direction is deflected towards the east by a magnetic force. The direction of the magnetic field is

A) straight up

B) straight down

C) south

D) west

Q: Which derived unit is equivalent to tesla T?

A) NA/m

B) N/Am

C) Nm/A

D) Am/N

Q: The unit of inductance the henry is equivalent to

A) Nm/A

B) VA/m

C) As/V

D) Vs/A

Q: When the speed at which a magnet is moved through a coil is increased the induced voltage

A) Increases

B) Remains the same

C) Decreases

D) Goes to 0

Q: Slip rings are part of

A) DC motor

B) AC generator

C) Transformer

D) Magnet

Q: A transformer is used for

A) Both DC and AC

B) AC voltages

C) DC voltages

D) Farming