Force, Work, Energy and Power — Physics STD 10 — Question

A lens forms the image of an object placed at a distance 15 cm from it, at a distance 60 cm in front of it. Find : the nature of image.

What are isobars?

What is the voltage of the electricity that is generally supplied to a house?

(a) In which direction conventional current and electronic current flow from a source of electricity?
(b) Name two materials whose resistance remains the same with the rise in temperature.

Explain, why the potential difference across the terminals of a cell is more when the cell is not in use than it is when the cell is being used.

In a single fixed pulley, if the effort moves by a distance x downwards, by what height is the load raised upwards?

What is the range of audibility?

State the energy changes in the following case while in use:
a petrol engine of a running car

A mixture of radioactive substances gives off three types of radiation name the radiation which has the highest ionizing power.

How should the electric lamps in a building be connected?