(A) Elastic spring force
(B) Gravitational force
(C) Electric force
(D) Frictional force
The field in which the work done is independent of the path followed or work done in a closed path is zero is called?
(A) Frictional field
(B) Electromagnetic field
(C) Conservative field
(D) Magnetic field
Total work done in a closed path in gravitational field is?
(A) -mgh
(B) +mgh
(C) Infinity
(D) Zero
X-Rays region lies between?
(A) Gamma rays and ultraviolet region
(B) Short radio waves and long radio waves
(C) Ultraviolet and visible region
(D) None of the above
Materials for rain proof coats and tents owe their water proof properties to?
(A) Elasticity
(B) Specific gravity
(C) Viscosity
(D) Surface tension
Solar cells work on the principle of?
(A) Photoelectric effect
(B) Photovoltaic effect
(C) Photoconductive effect
(D) Photosynthesis
Which electromagnetic radiation is used for satellite communication?
(A) Microwave
(B) Millimeter wave
(C) Infrared
(D) Ultraviolet
Charcoal is used in water treatment as a?
(A) Absorbent
(B) Coagulant
(C) Solvent
(D) Adsorbent