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A parallel combination of three resistor...

A parallel combination of three resistors takes a current of 5A from a 20V supply. If the two resistors are of 10 ohm and 8 ohm, find the value of third resistor.

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PUNJAB BOARD PREVIOUS YEAR PAPERS-Electric Current, Resistance and E.M.F. -Exercise
  1. A wire of length15m (meter) and uniform area of cross section 6.0 xx 1...

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  2. A wire of length 2.0 m, diameter 1.0 mm has 50 xx 10^-3 Omega (ohm) re...

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  3. A parallel combination of three resistors takes a current of 5A from a...

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  4. The parallel combination of three resistors takes a current of 7.5A fr...

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  5. A series combination of three resistors takes a current of 2A from a 2...

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  6. A wire has a resistance of 10.5Omega at 21^@C and 16.4Omega at 147^@C....

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  7. A resistance of a tungsten filament at 150^@C is 133Omega.What will be...

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  8. A silver wire has a resistance of 2.1Omega at 27.5^@C and a resistance...

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  9. Three identical cells of emf 4V each and unknown internal resistances ...

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  10. If maximum resistance from the combination of two resistances is 18 oh...

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  11. A wire with an area of cross-section as 10 mm^2 has a resistance of 5O...

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  12. A wire with an area of cross-section as 1 mm2 has a resistance of 10Q,...

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  13. Given three resistors of resistances 1Q (Ohm), 2Q (Ohm) and 3Q (Ohm). ...

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  14. How many electrons pass through alamp inone minute if current flowing ...

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  15. How does the conductivity of metals varies with the rise in their temp...

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  16. Why Eureka metal is used to make standard resistance coil?

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  17. Why copper is used to make connecting wires ?

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  18. How does the conductivity of semi-conductors varies with the rise in t...

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  19. Why Manganin is used to make standard resistance coil ? How does the e...

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  20. Define one Ampere of current.

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