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प्रश्न
Differentiate between:
Primary and secondary cell.
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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 |
Explain the meaning of the term magnetic field ?
Name four appliances which work using electricity ?
State three important uses of a magnet.
Draw lines of force surrounding a bar magnet when it is placed in the magnetic meridian with its north pole pointing geographic south.
State three important properties of a magnet.
Define the following term:
Angle of dip
Draw the magnetic field lines around a bar magnet when a bar magnet is placed such that the N pole points North.
State the laws of magnetism.
Match the following.
| Magnetite | Magnetic lines |
| A tiny pivoted magnet | Natural magnet |
| Cobalt | Compass box |
| Closed curves | Ferromagnetic material |
| Bismuth | Diamagnetic material |
