Question

Which of the following statements are correct?
(i) Human body is a good conductor of electricity.
(ii) The air gap surrounding an electric circuit acts as a conductor.
(iii) Silver conducts electricity better than any other metal.
(iv) When electricity lights up a bulb, no heat is produced.
A) I and ii
B) iii and iv
C) I and iii
D) ii and iii

Answer 1

A stream of charged particles, such as electrons or ions, flowing through an electrical conductor or space is known as an electric current. It's the net rate of electric charge flow through a surface or into a control container that's monitored. Charge carriers are the moving particles, and depending on the conductor, they might be one of numerous sorts of particles.

Complete answer:
We know that conductors are substances that enable electricity to travel through them; similarly, our bodies allow electricity to pass through them, making us good conductors of electricity. As a result, the human body is an excellent conductor of electricity.
Because it has a larger number of moveable atoms, silver is the finest conductor of electricity (free electrons). Electricity must be able to transport electrons through a substance to make it a good conductor; the more free electrons in a metal, the better its conductivity.
The electrons collide with the filament's metal atoms as they travel. Each collision's energy vibrates and warms the atoms, eventually creating light. An incandescent bulb converts just 10% of the energy it consumes into light; the remaining 90% is wasted as heat.
An air gap is a non-magnetic component of a magnetic circuit that is generally linked to the remainder of the circuit magnetically in series. This permits a significant amount of magnetic flux to pass through the gap. It has an insulating effect.
Hence option C is correct.

Note:
An electric current is the flow of electric charge, and its strength is generally measured in amperes. A current is made up of any moving charged particles, the most common of which are electrons. However, any charge in motion is a current. Electrical current can pass through some objects, such as electrical conductors, but not through an electrical insulator.