Refraction of Light at Plane Surfaces — Physics STD 10 — Question

A point's potential is considered 1 volt when:

The amount of heat energy required to melt a given mass of a substance at its melting point without any rise in temperature is called:

Make the correct choices for each of the following :
Total Internal reflection takes place when
(where ∠i = angle of incidence, ∠r = angle of refraction, ∠C = critical angle)

kWh is the unit of : ________ .

What will be the impact on deflection of the compass needle when the current in the conducting wire is increased?

What is the work done when a body moves along a circular path in a horizontal plane?

Convex lens produces a __________ .

The apparent depth of a liquid in a vessel is 15 cm, when its real depth is 20 cm. Find the refractive index of the liquid.

Where should an object be placed in front of a convex lens so as to form an upright and enlarged image?

To locate its prey in the darkness the owl or the bat emits