Question

Match the given columns.
Column A
1. Fuse
2. Green wire
3. Nichrome
4. Bakelite
5. current
6. resistance
Column B
(i) Used in the element of heaters
(ii) Flow of electric charge
(iii) Safety device
(iv) Hinderance to the flow of
electric current
(v) Earth wire
(vi) Used to make electric switches
Column C
(a) Ampere
(b) Insulating material
(c) Ohm
(d) Prevents short circuits
(e) Earthing
(f) Offers large resistance

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Answer 1

Answer:

1. Fuse (iii) Safety Device (d) prevent short circuits

2. Green wire (v) Earth wire (e) Earthing

3. Nichrome (i) Used in the element of heaters (f) Offers large resistance

4. Bakelite (vi) Used to make electric switches (b) Insulating material

5. Current (ii) Flow of electric charge (a) Ampere

6. Resistance (iv) Hindrance to the flow of electric current (c) Ohm

Answer 2

Answer:

s.no Column A - Column B - Column C

1 Fuse - safety device - prevent short circuits

2 Green wire - Earth wire - Earthing

3 Nichrome - used in the element of heaters - offers large resistance

4 Bakelite - used to make electric switches - insulating material

5 Current - Flow of electric charge - ampere

6 Resistance - Hindrance of the flow of electric current - ohm

Explanation:

• Fuse is an electrical safety device that operates to provide over current protection of an electrical circuit in electrical and electronical things.
• Grounding/earthing wires in the circuit are the green wires. The green wire can be connected to another green wire only. The grounding wire is not meant for lights or fans and is used mainly for socket purposes such as in the case of AC's, geysers and other heavy load appliances.
• Polyoxybenzylmethylenglycolanhydride, better known as Bakelite. It was the first plastic made from synthetic components.
• An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge through a surface or into a control volume.
• Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolised by the Greek letter omega (Ω).

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