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How will the reading in the ammeter A of...

How will the reading in the ammeter `A` of Fig. 6.39 be affected if another identical bulb `Q` is connected in parallel to `P` as shows. The voltage in the mains is maintained at a constant value.

A

The reading will be reduced to one-half.

B

the reading will not be affected.

C

The reading wil be double of the previous one.

D

The reading will be increased fourfold.

Text Solution

Verified by Experts

The correct Answer is:
C
Resistance is halved. Current is doubled.
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CENGAGE PHYSICS ENGLISH-ELECTRICAL MEASURING INSTRUMENTS-Single Correct
  1. How will the reading in the ammeter A of Fig. 6.39 be affected if anot...

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  2. A potentiometer is connected across A and B and a balance is obtained ...

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  3. In the circuit shows in Fig. 6.41, the reading of the ammeter is (assu...

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  4. In the circuit shows in Fig. 6.42, resistors X and Y, each with resist...

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  5. In the shows arrangement of a meter bridge, if AC corresponding to nul...

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  6. The length of a wire of a potentiometer is 100 cm, and the emf of its ...

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  7. In a meter bridge experiment, null point is obtained at 20 cm from one...

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  8. In the circuit, the galvanometer G shows zero deflection. If the batte...

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  9. In a potentiometer experiment, the balancing with a cell is at length ...

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  10. If in the experiment of Wheatstone's bridge, the positions of cells an...

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  11. Sensitivity of potentiometer can be increased by

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  12. The resistance of a galvanometer is 10 Omega. It gives full-scale defl...

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  13. A milliammeter of range 10 mA has a coli of resistance 1 Omega. To use...

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  14. Two cells of emfs E(1) and E(2)(E(1)gtE(2)) are connected as shown in ...

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  15. Figure 6.46, shows a wheatstone net, with P = 1000 Omega,Q = 10.0 Omeg...

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  16. An ideal ammeter (zero resistance) and an ideal voltmeter (infinite re...

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  17. A constant 60 V dc supply is connected across two resistors of resista...

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  18. Figure 6.49 shows a circuit that may be used to compare the resistance...

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  19. In the circuit shown in Fig. 6.50, an idel ammeter and an ideal voltme...

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  20. In which of the follwing arrangements of resistors does the meter M, w...

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