(A) electron
(B) proton
(C) neutron
(D) positron
The answer is: (C) neutron
Tag: electromagnetism mcqs
A device that stores electric charge is called a
(A) battery
(B) capacitor
(C) resistor
(D) generator
The answer is: (B) capacitor
Which device is often used to smooth out the sudden variations in line voltage?
(A) Breaker
(B) Capacitor
(C) Resistor
(D) Switch
The answer is: (B) Capacitor
Which device is often used to smooth out the sudden variations in line voltage?
(A) Breaker
(B) Capacitor
(C) Resistor
(D) Switch
The answer is: (B) Capacitor
The speed of light in air is
(A) 2.8×106 m/s
(B) 2.8×108 m/s
(C) 3.0×106 m/s
(D) 3.0×108 m/s
The answer is: (D) 3.0×108 m/s
The attractive force that binds protons and neutrons in nucleus of an atom is known as
(A) Coulomb force
(B) electromagnetic force
(C) nuclear force
(D) electromotive force
The answer is: (C) nuclear force
An element is identified by the number of ________ in its ________.
(A) protons, nucleus
(B) neutrons, nucleus
(C) electrons, atom
(D) positrons, atom
The answer is: (A) protons, nucleus
The foot-pound is the unit of
(A) time
(B) length
(C) weight
(D) energy
The answer is: (D) energy
All electromagnetic radiations travel through vacuum with the speed
(A) equal the speed of light
(B) less than the speed of light
(C) greater than the speed of light
(D) (A) or (B)
The answer is: (A) equal the speed of light
A transistor is a semiconductor device with at least ________ terminals.
(A) 2
(B) 3
(C) 4
(D) 5
The answer is: (B) 3