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What do the symbols given below represen...

What do the symbols given below represent in a circuit ? Write one function of each.

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First symbol is variable resistance and second is ammeter. Variable resistance changes the magnitude of current in the circuit, by variation in resistance. Ammeter is used to find current.
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OSWAAL PUBLICATION-ELECTRICITY-TOPIC-1 (Short Answer Type Questions -II)
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  9. An electric circuit consisting of a 0.5 m long nichrome wire XY, an am...

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  10. Derive an expression for electric energy consumed in a device in terms...

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  11. The resistance of a wire of 0.01 cm radius is 10Omega. If the resistiv...

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  12. There resistors of 3 Omega each are connected to a battery of 3 V as s...

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  13. ln an electric field the work done in bringing a 2 coulomb charge from...

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  14. The resistance per metre length of a wire is 10 Omega. If the resistiv...

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  15. Three resistors of 5 Omega, 10 Omega and 15 Omega are connected in ser...

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  16. Find out the reading of ammeter and voltmeter In the circuit given bel...

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  17. Draw schematic diagram of a circuit consuting of a battery of five 2V ...

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  18. An electric bulb is rated at 60W, 240V. Calculate its resistance. lf t...

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