Multiple Choice Questions (MCQ) on Physics
1-The part that is used to control the flow of electrons in a triode is
(A) Plate
(B) Filament
(C) Grid
(D) Cathode
(Ans: D)
2-Boron is doped into a pure semiconductor material. The resulting material is
(A) p-type
(B) p-n type
(C) n-type
(D) Insulator
(Ans: A)
3-The depletion region of p-n junction diode contains
(A) Electrons
(B) Holes
(C) No charge carriers
(D) Both holes and electrons
(Ans: C)
4-Universal logic gates are
(A) AND and OR
(B) OR and X-OR
(C) AND and NAND
(D) NAND and NOR
(Ans: A)
5-Energy per unit volume is dimensionally equal to
(A) Pressure
(B) Force
(C) Density
(D) Work
(Ans: A)
6-A particle of mass 2.2 g is travelling with a velocity of 2 m/s. The wavelength associated with the particle is ( h = 6.6 × 10^-34 Js)
(A) 1.5×10^-31 m
(B) 3.0×10^-35 m
(C) 15 m
(D) 20×10^-15 m
(Ans: A)
7-50 g bullet is fired from a 10 kg gun with a speed of 400 m/s. The recoil velocity of the gun is
(A) 4 m/s
(B) 2 m/s
(C) 5 m/s
(D) 3 m/s
(Ans: B)
8-A block of mass 50 kg slides over a horizontal distance of 1 m and the coefficient of friction is 0.2. The work done against the friction is
(A) 66 J
(B) 75 J
(C) 68 J
(D) 98 J
(Ans: D)
9-Uncontrolled fission chain reaction is the principle of
(A) Proton bomb
(B) Hydrogen bomb
(C) Atom bomb
(D) Nuclear reactor
(Ans: C)
10-A body falling through a liquid acquires a steady velocity called as
(A) end velocity
(B) touch down velocity
(C) terminal velocity
(D) steady state velocity
(Ans: C)