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A heater boils certain amount of water i...

A heater boils certain amount of water in 15 minutes. Another heater boils same amount of water in 10 minutes. Time taken to boil same amount of water when both are used in parallel is

A

25 minute

B

6 minute

C

12 minute

D

12.5 minute

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The correct Answer is:
B
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AAKASH INSTITUTE-CURRENT ELECTRICITY-ASSIGNMENT(SECTION-A(OBJECTIVE TYPE QUESTIONS))
  1. If two bulbs of power 60 W and 100 W respectively each rated 110 V...

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  2. Three bulbs B(1),B(2) and B(3) of equal resistance are connected as sh...

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  3. In a house, individual power of two elements are 10OW and 150 W . Effe...

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  4. How many 60 W bulbs may be safely run on 220 v using a 5 A fuse?

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  5. A cell of emf 16V and internal resistant 4 Omega can deliver maximum ...

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  6. A battery delivers equal power individually across 4 Omega and 16 Ome...

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  7. A heater boils certain amount of water in 15 minutes. Another heater b...

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  8. Minimum resistance obtained from two resistors 3Omega and 2 Omega is

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  9. A uniform wire os resistance 12 Omega is bent to form a circle. Effec...

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  10. A wire of resistance R is cut into ‘ n ’ equal parts. These parts are ...

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  11. Potential difference across AB in the circuit as shown in figure.

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  12. Potential difference across AB in the network shown is

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  13. emf of a chemical cell depends on

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  14. When current supplied by a cell to a circuit is 0.3 A, its terminal po...

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  15. Potential difference across AB in the network shown is

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  16. Five cells each of emf E and internal resistance r are connected in s...

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  17. Potential difference V(B)-V(A) in the network shown is

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  18. Resistance across AB as shown in figure is

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  19. Determine of unknown resistance in meter bridge is most accurate , whe...

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  20. Two cells of emf E(1) and E(2) ( E(1) gt E(2)) are connected in series...

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