We are able to walk on earth without slipping because of
Gravitational force
Frictional force
Viscous force
Viscous force
What is the phenomenon which established the transverse nature of light?
Reflection
Interference
Diffraction
Diffraction
What is the name of the device used to convert alternating current into direct current?
Ammeter
Galvanometer
Rectifier
Rectifier
Stars twinkle but planets do not twinkle because
they emit light of a constant intensity
their distance from the earth does not change with time
they are very far away from the earth resulting in decrease in intensity of light
they are very far away from the earth resulting in decrease in intensity of light
Which of the following is not true about X-rays?
have low penetrating power
travel with the speed of light
can be reflected or refracted
can be reflected or refracted
The washing machine works on the principle of ____________.
Dialysis
Diffusion
Reverse osmosis
Reverse osmosis
A body moving in a circular path with a constant speed has a ........
constant velocity
variable acceleration
constant kinetic energy
constant kinetic energy
During the motion of a projectile fired from the earth surface....
its kinetic energy remains constant
its momentum remains constant
vertical component of its velocity remains constant
vertical component of its velocity remains constant
Two vectors are said to be equal if
Only their magnitudes are same
Only their directions are same
Both magnitude and direction are same
Both magnitude and direction are same
