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State the relationship between the power...

State the relationship between the power P, consumed by a device, its resistance R and current I, flowing through it
An electric iron of resistance 20 ohm takes a current of 5A.Calculate
its electric power?

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MODERN PUBLICATION-ELECTRICITY-EXERCISE
  1. Write an expression for the amount of heat produced in a wire of resis...

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  2. Write an expression for the amount of heat produced in a wire of resis...

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  3. State the relationship between the power P, consumed by a device, its ...

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  4. State the relationship between the power P, consumed by a device, its ...

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  5. What determines the rate at which energy is delivered by a electric cu...

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  6. An electric motor takes 5A form a 220 V line. Determine the power of t...

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  7. An electric motor takes 5A from a 220 V line. Calculate the energy con...

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  8. Define the term volt.

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  9. State the relation between work, charge and potential difference for a...

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  10. An electric circuit consisting of a 1 m long metallic wire XY, an amme...

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  11. Differenciate between electrical resistance and resistivity of a condu...

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  12. A copper wire of resistivity 1.6xx10^-8 ohm-m has a cross sectional ar...

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  13. State the funciton of a fuse in a circuit. How is it connected in the ...

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  14. An electric fuse of rating 3A is connected in a circuit in which elec...

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  15. Three resistance R1, R2 and R3 are connected on parallel. Show that th...

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  16. Express ohm's law by a mathematical formula.

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  17. Write ohm's law. Draw a circuit diagram to prove it experimentally in ...

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  18. Present the relationship between the voltage applied across a conducto...

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  19. Find the equivalent of resistances of the individual resistance connec...

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  20. Two wires X and Y are of equal length and have equal resistance. If th...

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