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When an electric cell drives current thr...

When an electric cell drives current through load resistance, its Back emf, 

A

Supports the original emf

B

Opposes the original emf

C

Supports if internal resistance is low

D

opposes if load resistance is large

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE - IA
  1. The terminal Pd of a cell is equal to its emf if

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  2. Back emf of a cell is due to

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  3. When an electric cell drives current through load resistance, its Back...

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  4. Which depolarizers are used to neutralizes hydrogen layer in cells

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  5. Two batteries of emfs epsilon(1) and epsilon(2) (epsilon(2) gt epsilon...

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  6. A battery consists of a variable number n of identical cells having in...

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  7. A cell of emf E has an internal resistance r & is connected to rheosta...

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  8. n identical cells, each of emf epsilon and iternal resistance r, are j...

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  9. n identical cells, cach of emf epsilon and internal resistance r, are ...

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  10. A cell of emf E having an internal resistance r is connected to an ext...

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  11. Kirchhoff's law of junctions (first law), Kirchhoff's law of meshes (s...

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  12. In a balanced Wheatstone's network, the resistances in the arms Q and ...

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  13. If galvanometer and battery are interchanged in balanced Wheatstone br...

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  14. Wheatstone bridge can be used

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  15. In a Wheatstone's bridge three resistances P,Q,R connected in three ar...

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  16. Wheatstone bridge is most sensitive when the arms ratio is

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  17. In metre bridge experiment, the known and unknown resistances in the t...

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  18. In a metre bridge, metal wire is connected in the left gap, standard r...

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  19. Metal wire is connected in the left gap, semi conductor is connected i...

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  20. Metal wire is connected in the left gap, Germanium connected in the ri...

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