Electricity — Physics STD 10 — Question

In which of the following case does the electromagnetic induction occur?

A magnet is moved through a loop of wire .

Write the approximate value of specific heat capacity of water in SI unit.

A lever of length 9 cm has its load arm 5 cm long and the effort arm is 9 cm long.
What will be the mechanical advantage and velocity ratio if the efficiency becomes 50% ?

What is meant by the term 'center of gravity of a body'?

In the following cases, where must an object be placed in front of a convex lens so that the image formed is of same size as the object .

Can the absolute refractive index of a medium be less than one?

How should the electric lamps in a house be connected so that the switching ON or OFF in a room has no effect on other lamps in the same building?

State the commercial unit of electrical energy.

Write the SI units of power.

Which has a greater speed: mechanical wave or electromagnetic wave?