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When an electric cell is in use, .... Re...

When an electric cell is in use, .... Relation holds good.

A

`epsilon = V - Ir `

B

`epsilon = V + Ir`

C

`epsilon = V `

D

`epsilon = V + IR `

Text Solution

Verified by Experts

The correct Answer is:
B
`epsilon = V + Ir`
When current flows away from positive terminal of the cell, it gets discharged and so its tenninal voltage is,
V = `epsilon - Ir `
`therefore epsilon = V + Ir `
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KUMAR PRAKASHAN-CURRENT ELECTRICITY-SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs FROM .DARPAN. BASED ON TEXTBOOK)
  1. The current through a wire varies wilh time as I = I(0) + alpha t wh...

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  2. Electric charge passing through a resistor changes with time t as Q = ...

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  3. When an electric cell is in use, .... Relation holds good.

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  4. Resistivity of material does not depend on ...... of conductor

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  5. Lengths and cross-sectional areas of three copper wires are (l, A ), (...

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  6. Which of the following curve represents negative resistance ?

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  7. ..... is Ohm 's law for good conductor

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  8. Ohmic resistance of conductor .....

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  9. SI unit of electrical conductivity is

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  10. For a block with dlmensions 1 cm xx 1 cm xx 100 cm havng resistivity...

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  11. Specific resistance of material of one wire is rho. Its volume is 3 m^...

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  12. Which is the dimensional formula for conductance from the given below ...

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  13. The physical quantity having the dimentiom, M^(-1) L^(-3) T^(3) A^(2) ...

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  14. SI unit of electrical conductivity is

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  15. Resistance of wire having diameter 2 mm and length 100 cm is 0.7 Omega...

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  16. Resistance of wire having radius r is R. If new wire of radius 2r, is ...

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  17. On applying an electric field of 15 xx 10^(-6) vm^(-1) across a cond...

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  18. The ratio of length of two wires of same mass arc made up of same mate...

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  19. Resistance of a wire is ROmega. It is stretched uniformly till Its len...

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  20. J = sigma E represents ........ .

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