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A dc source of emf E1 = 100 V and intern...

A dc source of emf `E_1 = 100 V `and internal resistance r =`0.5 Omega `,a storage battery of emf `E_2 =90` V and an external resistance R are connected as shown in figure. For what value of R no current will pass through the battery ?

A

A) `5.5 Omega `

B

B) `3.5 Omega `

C

C) `4.5 Omega `

D

D) `2.5 Omega `

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-APPENDICES ( REVISION EXERCISE )-REVISION EXERCISE (CUTTENT ELECTRICITY )
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  2. The p.d. across the terminals of a battery is 50 V when 11 A are drawn...

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  3. A dc source of emf E1 = 100 V and internal resistance r =0.5 Omega ,a ...

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  4. A 6V cell with 0.5Omega internal resistance and 10V cell with 1Omega i...

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  5. A 5V battery with internal resistance 2 Omega and a 2V battary with i...

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  6. If in the circuit shown below, the internal resistnace of the battery ...

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  7. In the circuit shown, a voltmeter of internal resistance 'R' when conn...

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  8. For a cell, the graph between the p.d.(V) across the terminals of the ...

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  9. When two cells of different emf's are connected in series to an extern...

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  10. How many cells each marked (6V-12A) should be connected in mixed group...

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  11. Find the minimum number of cells required to produce an electric curre...

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  12. A d.c main supply of e.m.f 220 V is connected across a storage battery...

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  13. The P.d between the terminals A&B is

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  14. A wire of length L and three identical cell of negligible internal res...

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  15. The current through 10 Omega resister in the figure is approximately

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  16. In the circuit shown, current (in A) through the 50 V and 30V batterie...

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  17. The value of current i1 in the given circuit is

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  18. A current of 3A flows in a circuit the potential difference between po...

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  19. A balanced wheatstone bridge is shown the values of currents i(1) and ...

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  20. In Wheat stone's bridge shown in the adjoining figure galvanometer giv...

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