Contact force is another name for .............
Friction
Magnetic force
Electrostatic force
Muscular force
The force of friction between two surfaces will increase if:
a layer of lubricant is kept between the two surfaces
the two surfaces are pressed harder
air gap is created between the two surfaces
irregularities on both the surfaces are removed
An image formed by a plane mirror, that cannot be obtained on a screen is called _______.
Virtual Image
Real Image
Inverted Image
Erect Image
The force exerted by a magnet is an example of ...............
Non-contact force
Muscular force
Contact force
Electrostatic force
According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the _________ of an object.
density
volume
force
mass
The coil wire in the electric room heater or electric cooking heater is called ............
circuit
element
filament
cells
The passage of an electric current through a conducting liquid causes ............
Galvanisation
Evaporation
Physical Reaction
Chemical Reaction
The incident ray, the _________ at the point of incidence and the reflected ray all lie in the same plane.
surface
tangent
normal
angle of reflection
During uniform motion of an object along a straight line, the ________ remains constant with time.
time
velocity
acceleration
distance
B.
velocity