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प्रश्न
Differentiate between:
Primary and secondary cell.
उत्तर
Primary cells are the cells in which chemical reaction is irreversible so they can't be charged again and again. While, secondary cells are the cells in which chemical reaction is reversible and can be charged again and again.
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संबंधित प्रश्न
Match the following
| Column A | Column B |
| (a). Human body | (1). electric bell |
| (b). Silk thread | (2). current |
| (c). Charge in motion | (3). conductor |
| (d). soft iron | (4). electromagnet |
| (e) . Electromagnet | (5). insulator |
Fill in the blank.
Magnetic poles always exist in ...............
Give a reason for the following.
Iron is a magnetic substance.
Define the following term regarding a bar magnet:
Magnetic axis
How will you do this?
Determine whether a material is magnetic or non-magnetic.
If a magnet attracts a piece of metal, that piece must be made of ______.
The south pole of a bar magnet and the north pole of a U-shaped magnet will _______.
Consider the statement given below and choose the correct option.
Assertion: Iron filings are concentrated more at the magnetic poles.
Reason: The magnets are so sharp.
The strongest natural magnet is ______.
