Free MCQs & Online Quiz Practice for Exams

Q: An object is placed 7 cm from a concave mirror whose radius of curvature is 10 cm. The image formed will be

A) real and upright

B) virtual and upright

C) real and inverted

D) virtual and inverted

Q: Which one of the following materials will refract light more

A) water

B) glass

C) air

D) diamond

Q: A convex lens with focal length 8.00 cm has the power of lens

A) 2.05 D

B) 4.00 D

C) 12.5 D

D) 16.0 D

Q: If the distance from your eye's lens to the retina is shorter than for a normal eye you will struggle to see objects that are

A) nearby

B) colorful

C) far away

D) moving fast

Q: Who benefits more from using a magnifying glass a person whose near point is located at a distance away from the eyes of

A) 75 cm

B) 50 cm

C) 35 cm

D) 25 cm

Q: The human eye forms the image of an object at its

A) iris

B) retina

C) pupil

D) cornea

Q: Unit of electric charge is?

A) Coulomb

B) Volt

C) Ampere

D) Ohm

Q: When comb rubs hair the hair becomes?

A) Positive

B) Negative

C) Neutral

D) INFINITE

Q: Conductor differs from insulator because?

A) Electrons free

B) Protons free

C) Neutrons free

D) All free

Q: Coulomb?s law depends on?

A) Magnitude of charges

B) Distance between them

C) Medium

D) All of above

Q: Initially sphere A has a charge of -50e and sphere B has a charge of +20e. The spheres are identical and conducting. If the spheres then touch what is the resulting charge on sphere A?

A) -15e

B) +15e

C) +35E

D) -35E

Q: Capacitor stores energy in the form of?

A) Magnetic field

B) Electric field

C) Current

D) Charge

Q: When combing our hair we shift electrons from our hair onto the comb. The charge on our hair is

A) Positive

B) Negative

C) Zero

D) INFINITE

Q: The unit of charge is

A) farad

B) coulomb

C) volt

D) electron volt

Q: Initially sphere A has a charge of -50e and sphere B has a charge of +30e. The spheres are identical and conducting. If the spheres then touch what is the resulting charge on sphere A?

A) +10e

B) -30e

C) +30e

D) -10e

Q: If the distance between two charged particles is halved the Coulomb force between them becomes

A) Four Times

B) one quarter

C) double

D) half

Q: The value of Coulomb constant k depends on

A) value of charges

B) material medium

C) separation between charges

D) all of these

Q: If an additional capacitor is added to a group of capacitors already connected in series the equivalent capacitance

A) increase.

B) stay the same

C) decrease

D) Goes to Zero

Q: The unit of electric potential is

A) farad

B) coulomb

C) volt

D) NC'

Q: Four identical 1 μF capacitors are connected together electrically. What is the least possible capacitance of the combination?

A) 4 μF

B) 1 μF

C) 1/4 μF

D) 2 μF