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PHYSICS [1 Mark Question Answer]

Magnetism · ICSE STD 6 (ICSE - English Medium). 8 questions.

Questions

[1 Mark Question Answer]

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8 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark
The directive property of magnets is used in a compass.
Answer
The directive property of magnet is used in a compass for navigation purposes as the magnetic needle inside the compass always rests in the geographical north-south direction.
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Question 31 Mark
Can you bring two similar poles of two different magnetic close together easily ? Why ?
Answer
No, because like poles repel each other, when two magnetic are brought close to each other.
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Question 41 Mark
What are magnetic substances ?
Answer
Substances such as iron, nickel, cobalt, or their alloys that get attracted by a magnet are called magnetic substances
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Question 51 Mark
Gauri had a long bar magnet with her while she needed a U shaped magnet for her school project. She decided to heat her bar magnet and bend it to give it a U shape. Suggest Gauri where and why is she wrong. What will be the outcome if she does what she decided.
Answer
If Gauri heats her bar magnet, it would get demagnetized and lose its magnetic properties.
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Question 61 Mark
Name a few common appliances that use electromagnets.
Answer
Electric bells, electric motor, telephones, loudspeakers and generators are few common appliances that use electromagnets.
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Question 71 Mark
If a bar magnet is placed over iron fillings, where will the attraction of the iron fillings be –
a. maximum ?
b. minimum ?
Answer
a. At the ends of the bar magnet. b. At the centre of the magnet.
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Question 81 Mark
Give two examples each of magnetic and non-magnetic substances.
Answer
Examples of magnetic substances – Iron, nickel, cobalt Examples of non-magnetic substances – Plastic, wool, wood, paper, rubber, etc.
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