Machines — Physics STD 10 — Question

Name the material used for making the armature of an electric bell. Give a reason for your answer.

What happens to the image formed by a convex lens if its lower part is blackened?

Explain why Standing passengers are not allowed on the upper deck of a double-decker bus.

An object is placed in front of a lens between its optical centre and the focus and forms a virtual, erect, and diminished image. Draw a ray diagram to show the formation of the image with the above-stated characteristics.

A radioactive source emits three types of radiations.

Name the radiation which has the highest ionizing power.

Give two examples of P.E.

How does the position of an element change in the periodic table when it emits out an alpha particle?

A substance is heated gradually. Does its energy increase or decrease?

How should the electric lamps in a building be connected?

In household circuits, is a fuse connected in series or in parallel?