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Two coils connected in series have resis...

Two coils connected in series have resistance of `600K Omega` and `300 Omega` at `20^@C` and temperature coefficient of` 0.001` and `0.004 (.^@C)^-1` respectively. Find resistance of the combination at a temperature of `50^@C`. What is the effective temperature coefficient of combination?

A

`462 Omega`

B

`954 Omega`

C

`1806 Omega`

D

`214 Omega`

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The correct Answer is:
A, B
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RESONANCE ENGLISH-CURRENT ELECTRICITY-Exercise-1 (Part-2)
  1. Find the current through the 10(Omega)resistor shown in figure.

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  2. The efficiency of a cell when connected to a resistance R is 60 %. Wha...

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  3. Two coils connected in series have resistance of 600K Omega and 300 Om...

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  4. Two coils connected in series have resistance of 600K Omega and 300 Om...

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  5. Each resistance shown in the network is in ohm. Current through the re...

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  6. Two electric bulbs marked 25W - 220V and 100W - 220V are connected in ...

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  7. In the figure shown, each resistor is of 20 Omega and the cell has emf...

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  8. Arrange the order of power dissipated in the given circuits, if the sa...

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  9. Five identical resistors each of resistance 1Omega are initially arra...

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  10. Four identical bulbs each rated 100 watt, 220 volts are connected acro...

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  11. Three equal resistors connected in series across a source of EMF...

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  12. The given Wheatstone bridge is showing no deflection in the galvanom...

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  13. Three equal resistances, each of ROmega are connected as shown in figu...

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  14. A wire of resistance 0.1 cm^(-1) bent to form a square ABCD of side 10...

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  15. In the circuit shown in Fig. 7.39, the heat produced in the 5 Omega re...

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  16. A 50 W bulb is in series with a room heater and the combination is con...

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  17. The equivalent resistance between the points A and B is

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  18. A battery of internal resistance 4 Omega is connected to he network of...

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  19. In these circuits all the batteries are indentical and have negllgible...

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  20. Two nonideal batteries are connected in parallel. Consider the followi...

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