11 Questions
What is the result of the expression $2 + (16-17) - 4 + 3$?
0
What is the variable name in the given text?
Aladi
What is the revision number mentioned in the text?
1
How many digits are in the number mentioned in the text as '1111'?
4
Write the number '5' in words.
Five
Explain how the strength of an electromagnet can be increased according to the text.
By increasing the current or the number of turns in the coil.
Describe how the polarity of an electromagnet can be changed.
By changing the direction of the current flowing through the coil.
What is the difference between an electromagnet and a permanent magnet when it comes to working without electric current?
An electromagnet loses its magnetism when the current stops flowing, while a permanent magnet does not need electric current to work.
Define magnetic induction as explained in the text.
Magnetic induction is the phenomenon where a piece of steel or iron behaves like a magnet when near a strong magnet.
What are induced magnetic poles in the context of iron or steel near a strong magnet?
Induced magnetic poles are the magnetic poles formed at the ends of iron or steel when placed near a strong bar magnet.
Explain why two common pins attached to the pole of a bar magnet diverge outward and converge inward when attached to each end of a horse-shoe magnet.
The pins diverge in the bar magnet case because they acquire similar poles, while they converge in the horse-shoe magnet case due to acquiring opposite poles.
Test your math skills by evaluating an arithmetic expression. Identify the variable name, revision number, and count the number of digits in a given number. Practice writing numbers in words with this quiz.
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