Question

Vacuum cleaner works on the principle of
A.Difference of pressure
B.Force from atmosphere
C.Electric suction
D.None

Answer 1

Hint:
Any physical process tends to move towards a stable state that is from higher concentration of particles to lower concentration of particles, same is the case with the principle of vacuum cleaner. The air always moves from a region of higher concentration to a region of lower concentration.

Complete step by step answer:
So according to the note, the principle of vacuum cleaner is based on the concept of difference of pressure outside and inside of the vacuum pump.
A vacuum pump creates a pressure lower than atmospheric pressure and this lower pressure is passed through the nozzle of the vacuum cleaner where air at atmospheric pressure will enter it. If the nozzle is placed upon a surface which it is desired to clean, then the velocity of the air entering the nozzle will bring with it dust etc. on that surface.
Due to this difference in pressure due to the vacuum pump, outside atmospheric pressure becomes greater and as we know the physical process moves from higher concentration to lower concentration to make up the empty space, and so is the case with pressure.

So, the difference in pressure is the correct answer and the correct option is A.

Note:

The pressure exerted by the atmosphere at the earth's surface. It has an average value of $1$ atmosphere. The pressure at any location on the Earth, caused by the weight of the column of air above it.
We use Bernoulli’s equation to measure pressure difference Because Bernoulli’s equation relates pressure, fluid speed, and height. This is used in fluid dynamics.