Unit - 5.1 Reflection Of Light On Plane Surfaces — PHYSICS STD 8 — Question

Yashika was given an electroscope with its gold leaves diverged. What do the diverged leaves indicate? She was also given a rod which she did not know was charged or not. Yashika touched the rod to the cap of the electroscope to find that the divergence of the gold leaves decreased. What should she infer about the charge status of the rod?

Explain the heating of an iron rod by conduction on the basis of kinetic model.

State the voltage at which electricity is supplied to our houses.

State and define the SI unit of pressure.

How is household energy consumption calculated in kilowatt hour (kWh)?

State two uses of :- Convex mirror

Write the correct statement :
The electric charge leaks from the flat surfaces.

Name the processes involved in two cases.

What do you understand by the term meniscus?