PHYSICS [2 Mark Question Answer]

Short circuit is caused due to the contact between the live and the neutral wire because of defective or loose connections or damaged wiring. This results in a sudden large current flowing through the circuit.

Earthing of an electrical device refers to the connection of the metal case of the electrical appliance to a large metal plate buried deep inside earth, via an earth wire.

When an uncharged object is touched with another charged object, the uncharged object, also gets charged. The total charge on the charged object gets equally distributed between the two objects in contact. The process is called charging by conduction.

When a positively charged glass rod is brought in contact with a negatively charged electroscope, the free electrons from the leaves move towards the rod. This decrease in negative charge decreases the divergence in the gold leaves. Hence, the gold leaves collapse.

When a glass rod is rubbed with silk, some free electrons from the glass get transferred to the silk cloth, thus making the glass positively charged and the silk negatively charged.

Dust accumulate on ceiling fans due to the electrical attraction between the blades and dust particles. As the blades of a fan rotate, they experience frictional forces due to the air around it. Due to this, the blades of the fan get charged and attract the dust particles in the air.