Calorimetry — Physics STD 10 — Question

Fill in the following blank using suitable word:
The amount of heat required to change the state of a physical substance without any change of temperature is called .......... of the substance.

In class III lever, the effort arm is always ___________ [larger than/smaller than/equal to] the load arm.

Slimmer the glass slab, ___________ [greater/ less/ equal] is the lateral displacement.

The S.I. unit of moment of force is _________.

In equilibrium algebraic sum of moments of all forces about the point of rotation is ______________.

In a transformer, the frequency of a.c. voltage ___________ [remains same / decreases / increases].

The conversion of part of energy into an undesirable form is called ________ .

When light travels from a denser to a rarer medium, its speed ________ .

A ___________ [torque/couple/force] is always needed to produce rotation.