If electric resistance is to be decreased, then the number of resistances should be connected in
Series
Parallel
Mixed arrangement
Mixed arrangement
Temperature of distant luminous bodies can be determined by
Mercury thermometers
Gas thermometers
Pyrometers
Pyrometers
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules is
Conduction
Convection
Radiation
Radiation
What type of force acts on a car moving around a curve?
Centrifugal force
Cohesive force
Centripetal force
Centripetal force
Which phenomenon is responsible for the echo of sound wave?
Reflection
Refraction
Interference
Interference
Purpose of an optical filter is to
reflect lights of different colours
dispense light into component colours
refract light of different colours
refract light of different colours
The 'Choke' used with a tube light is basically .............
an inductor
a capacitor
a transformer
a transformer
Curie is a unit of .............
radioactivity
energy of Gamma rays
intensity of Gamma rays
intensity of Gamma rays
The washing machine works on the principle of
Dialysis
Diffusion
Reverse osmosis
Reverse osmosis
A good conductor while carrying current is
negatively charged
positively charged
electrically neutral
alternately charged positive and negative
A.
negatively charged