Answer: Option B. -> False
:
B
A human body can conduct electricity as it is composed largely of water and charged particles (ions). So we need to be careful while handling the electrical appliances, as we may get an electric shock.

Answer: Option A. -> Either to complete or break a circuit
:
A
A switch is a simple device that is used either to complete or break a circuit. In the following circuit, bulb glows when the switch is “ON” and itdoes not glow when the switch is “OFF”.

Answer: Option A. -> it acts as an insulator
:
A
An electrician uses rubber or plastic gloves while repairing an electric appliancebecause it is an insulator and saves him from all the electric shocks. Insulators do not allow electric current to pass through them.

Answer: Option B. -> False
:
B
Electric current is a flow of charges. A good conductor consists of many free electrons in it and allow the flow of electrons with less resistance. Jute string is a bad conductor of electricity. Hence, we cannot use it in electrical circuits.

Answer: Option A. -> No current flows through the circuit.
:
A
A switch is a device that isused to make or break an electric circuit. Whenthe switch is turned off, it breaks the circuit and no current flows. When you turn on the switch, the circuit gets complete and the current starts to flow.

Answer: Option B. -> False
:
B
Electric current is a flow of charges. Electricity passes through a material when there are free electrons present in them. Materials that don'tconduct electricity (with very few free electrons or even no free electrons) are called insulators.Rubber is an insulator aselectrons are tightly held so that no electrons are free to move.

Answer: Option B. -> A switch is used to make or break a circuit.
:
B
Aswitchis anelectrical component that can make or break an electrical circuit. When the switch is 'ON', the circuit is closed, providing a path for the electric current to flow. On the other hand, when the switch is 'OFF', the circuit is open, thereby breaking the path ofthe flow of current.

Answer: Option B. -> Bulb would not glow.
:
B
The bulb will glow only when the circuit is complete.Here, one of the terminals of the battery was disconnected. So, the circuit is not complete and the bulb will notglow.

Answer: Option A. -> Bulb's filament is broken.
:
A
If an electric bulb does not glow even when it is connected to the cell, it could be due to one of the following reasons:
1. The bulb is fused. The part of a bulb that completes the circuit is its filament. A bulb that has a broken filament is termed as a 'fused bulb'.
2. Circuit may be broken. This may be because switch is off, a blown fuse, burnt wires, etc.
3. Connecting wires are made of an insulator. Usually copper, being a good conductor, is used to make connecting wires.
So, the circuit was not complete and hence the bulb did not glow.

Answer: Option A. -> True
:
A
Materials which allow electric current to pass through them are called conductors. Materials used for making wires should always be good conductors. Copper is the frequently used material in making of wires.