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A toaster operating at 240 V has a resis...

A toaster operating at 240 V has a resistance of `120Omega`. The power is ………. .

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A toaster operating at 240 V has a resistance of 120 Omega . The power is

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A milliammeter of range 10 mA has a coil of resistance 1 Omega . To use it as a voltmeter of range 10 V, the resistance that must be connected in series with it is

A 10 m long wire of resistance 20Omega is connected in series with a battery of emf 3V and a resistance of 10Omega . The potential gradient along the wire in volt per metre is

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A galvanometer of resistance 50 Omega is connected to a battery of 3V along with a resistance of 2950 Omega in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be:

A 4 mu F capacitor is charged to 400 V and then its plates are joined through a resistance of 1 K Omega . The heat produced in the resistance is

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FULL MARKS-CURRENT ELECTRICITY-Additional Questions Solved (Fill in the blanks)
  1. The material through which electric charge can flow easily is ………………. ...

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  2. A toaster operating at 240 V has a resistance of 120Omega. The power i...

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  3. In the case of insulators, as the temperature decreases, resistivity ...

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  4. When n resistors of equal resistance (R ) are connected in series, the...

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  5. The net flow of charge at any point in the conductor is …………………….. .

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  6. The flow of free electrons in a conductor constitutes ………………….. .

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  7. The rate of flow of charge through any wire is called ……………………… .

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  8. The drift velocity acquired per unit electric field is the ………………….. .

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  9. The reciprocal of resistance is ……………………….. .

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  10. The unit of specific resistance is .

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  11. The reciprocal of electrical resistivity is called ……………….. .

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  12. With increase in temperature the resistivity of metals …………………….. .

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  13. The specific resistance for the insulators is in the range of

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  14. The resistivity of semiconductors is of the order of ………………… .

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  15. The materials which conduct electricity at zero resistance are called ...

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  16. Conductors turn into superconductors at ……………………. .

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  17. The resistance of superconductors is …………………….. .

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  18. The phenomenon of superconductivity was discovered by ………………………. .

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  19. Mercury becomes a superconductor at …………………. .

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  20. With increase of temperature, resistance of conductors ……………………….. .

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