Unit - 3.2 Various Forms Of Energy And Their Interconversion — PHYSICS STD 7 — Question

Given below statement is incorrect. Write the correct statement :
During the charging of a inverter battery, the chemical energy changes into electric energy.

Given below statement is incorrect. Write the correct statement :
When the sound travels in air, the particles of air vibrate differently compared to the vibrations of the vibrating body.

Given below stament is incorrect. Write the correct statement :
The amount of space occupied by an object is called its area.

Which quantity : mass or weight, does not change by change of place ?

Name the characteristic which differentiates two sounds of the same pitch and same loudness.

Name any two conductors.

Give an example where electrical energy gets converted to sound energy.

Given below statement is incorrect. Write the correct statement :
When a body covers equal distances in equal intervals of time in a specified direction, it is said to be moving with uniform speed.

A person sitting in a compartment of a moving train is relative to the other person sitting by his side and is relative to the platform.

Given below stament is incorrect. Write the correct statement :
One hectare is equal to the size of a square having side 10 m.