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Satkriti Roao
@satkriti-roao
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Joined: Jun 14, 2021
Last seen: Aug 6, 2021
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Topics: 2248 / Replies: 1
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Topic
Draw a labelled diagram to show the domestic electric wiring from an electric pole to a room. Give the wiring for a bulb and a three-pin socket only. (b) State two hazards associated with the use of electricity.
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 324
Topic
(a) Why are fuses fitted in the fuse box of a domestic electricity supply? (b) What device could be used in place of the fuses?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 301
Topic
(a) What current is taken by a 3 kW electric geyser working on 240 V mains? (b) What size fuse should be used in the geyser circuit?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 313
Topic
What is the function of an earth wire? Why is it necessary to earth the metallic bodies of electrical appliances?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 213
Topic
An electric iron is rated at 230 V, 750 W. Calculate (i) the maximum current, and (ii) the number of units of electricity it would use in 30 minutes. (b) Which of the following fuse ratings would be suitable for this electric iron?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 288
Topic
Explain the importance of using in a household electric circuit (i) fuse, and (ii) earthing wire.
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 203
Topic
When does a fuse cut off current? How does it do it? (b) What is the maximum number of 60 W bulbs that can be run from the mains supply of 220 volts if you do not want to overload a 5 A fuse?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 111
Topic
Distinguish between the terms ‘overloading’ and ‘short-circuiting‘ as used in domestic circuits.
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 99
Topic
What type of electric fuse is used in electrical appliances like car stereos? Explain with the help of a labelled diagram.
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 102
Topic
(a) Of what substance is the fuse wire made? Why? (b) Explain why, a copper wire cannot be used as a fuse wire.
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 93
Topic
A fuse should always be placed in the……. wire of a mains circuit. (b) The earth wire should be connected to the……. of an appliance.
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 137
Topic
How should the electric lamps in a building be connected so that the switching on or off in a room has no effect on other lamps in the same building?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 80
Topic
Give two reasons why different electrical appliances in a domestic circuit are connected in parallel.
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 81
Topic
What is the main purpose of earthing an electrical appliance?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 85
Topic
What is the usual colour of the insulation of: (a) live wire, (b) neutral wire, and (c) earth wire?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 83
Topic
Usually three insulated wires of different colours are used in an electrical appliance. Name the three colours.
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 78
Topic
In household circuits, is a fuse wire connected in series or in parallel?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 89
Topic
In which wire in an A.C. housing circuit is the switch introduced to operate the lights?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 84
Topic
When does an electric short circuit occur?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 83
Topic
If fuses of 250 mA, 500 mA, 1 A, 5 A and 10 A were available, which one would be the most suitable for protecting an amplifier rated at 240 V, 180 W?
5 years ago
Forum
Magnetic Effects of Electric Current
Replies: 0
Views: 107
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