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A battery gives a current of 0.5A with a...

A battery gives a current of 0.5A with an external resistor of `12 Omega` and.0.25 A with resistor of `25 Omega` Calculate the
emf

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BINA LIBRARY-CURRENT ELECTRICITY-EXERCISE
  1. A cylindircal metallic wire is stretched to increse its length by 5%. ...

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  2. A cell of emf 4V and internal resistance 0.5 is connected across a loa...

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  3. A battery gives a current of 0.5A with an external resistor of 12 Omeg...

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  4. battery gives a current of 0.5A with an external resistor of 12 Omega ...

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  5. A cell can be balanced against 110 cm and 100 cm of potentiometer wire...

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  6. A resistance wire connected in the left gap of a metre bridge balances...

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  7. In a potentiometer arrangement, a cell of emf 1.25 V gives a balance p...

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  8. With a certain cell, the balance point is obtained at 65 cm from the e...

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  9. Two wires of same metal have same length, but their cross sections are...

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  10. A wire of resistance R is cut into n equal parts. These parts are conn...

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  11. The resistance of a 10m long wire is 10 Omega. Its length is increased...

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  12. If there is an increase in length by 0.1% due to stretching the percen...

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  13. How many electrons constitute current of one ampere?

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  14. A car battery has emf 12V and internal resistance 5 x 10^-2 Omega. it ...

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  15. The internal resistance of a cell of emf 2V is 0.1Omega. It is connect...

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  16. The resistance in two gaps of a meter bridge are 10 Omega and 30 Omega...

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  17. What is a potentiometer? Why is it most accurate device in measuring e...

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  18. In a potentiometer experiment the balancing length with a cell is 560 ...

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  19. Two resistances are joined in parallel whose resultant is 6/5 ohms. On...

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  20. The smallest resistance obtained by connecting 50 resistance of 1/4 oh...

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