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The resistance of the rheostat shown in ...

The resistance of the rheostat shown in figure is `30(Omega)`. Neglecting the meter resistance,find the minimum and maximum currents through the ammeter as the rheostat is varied.

A

`2/5`

B

`83/15`

C

`9/43`

D

`19/43`

Text Solution

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The correct Answer is:
A
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RESONANCE ENGLISH-CURRENT ELECTRICITY-Exercise-2 (Part-1)
  1. In a circuit shown in Fig, resistances R(1) and R(2) are known , as w...

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  2. A resistor R is conneted to a parallel combination of two identical ba...

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  3. The equivalent resistance between A and B will be (in Omega)

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  4. Six wires each of resistance r form a tetrahedron. The equivalent resi...

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  5. The equivalent resistance between points A and B is

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  6. In the question find the resistacnce between points 1-3.

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  7. The effective resistance between points P and Q of the electrical ci...

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  8. A 100 W bulb B(1) and two 60W bulbs B(2) and B(3), are connected to a ...

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  9. When a galvanometer is shunted with a 4 Omega resistance, the deflecti...

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  10. In the circuit shown the reading of ammeter and voltmeter are 4 A and ...

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  11. In the circuit shown in figure reading of voltmeter is V(1) when only ...

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  12. If the reading of ammeter A(3) in figure is 0.75 A. Neglecting the res...

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  13. The resistance of the rheostat shown in figure is 30(Omega). Neglectin...

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  14. An ammeter and a voltmeter are joined in series to a cell. Their readi...

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  15. An ammeter and a voltmeter are connected in series to a battery of emf...

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  16. A galvanometer having resistance of 50 Omega requires a current of 100...

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  17. For the post office arrangement to determine the value of unknown resi...

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  18. Let V and I be the readings of the voltmeter and the ammeter respectiv...

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  19. A 10 ohm resistor is conneted to a supply voltage alternating between ...

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  20. Two cells of same emf E but internal resistance r(1) and r(2) are conn...

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