Physics Mcqs for the preparation of NTS, PPSC, SPSC, BPSC, KPSC, FPSC, OTS and other academic entry test and jobs tests.
76. Light beam which is highly directional is called
(a) Laser
(b) Eraser
(c) Maser
(d) Grazer
77. X-rays comprise of
(a) Electrons only
(b) Protons only
(c) Neutrons only
(d) Electromagnetic radiations
78. Which metal is not used as electromagnet
(a) Copper
(b) Iron
(c) Nickel
(d) Cobalt
79. A mobile phone sends and receives messages through
(a) Sound waves
(b) Microwaves
(c) Ultraviolet waves
(d) Radio waves
80. The ray with high penetrating power is
(a) α-rays
(b) β-rays
(c) ϒ-rays
(d) x-rays
81. Which one of the following allot ropes of carbon is used for cutting and drilling
(a) Diamond
(b) Graphite
(c) Activated carbon
(d) Carbon black
82. A periscope works by the principle of
(a) Refraction
(b) Total Internal reflection
(c) Diffraction
(d) Reflection and refraction
83. What is the power factor of a pure resistor circuit
(a) One
(b) Zero
(c) Leading
(d) Lagging
84. Dry Ice is
(a) Liquid Nitrogen
(b) Water ice
(c) Solid Carbon dioxide
(d) Frozen Ethanol
85. A transformer mainly transforms
(a) Current
(b) Voltage
(c) Frequency
(d) Power
86. The primary colors are
(a) Blue, green and red
(b) Blue, yellow and red
(c) Yellow, orange and red
(d) None of these
