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36. Length of a conducting wire is increased by 100%. The change in the resistance of the wire will be (NTSE Chhattisgarh, Stage-I, 2014-15)

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37. Three light bulbs of 40 W, 60 W and 100 W are connected in series with 220 volt source. Which of the bulbs will glow brightest? (NTSE Chhattisgarh, Stage-I, 2014-15)

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38. Four resistances each of value R Ω are connected as shown in the figure below.

What would be the net resistance between A and B? (NTSE Odisha, Stage-I, 2014-15)

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39. Six resistances are to be connected to a battery. After connecting a particular set of five resistances with values R1, R2, R3, R4 and R5 as shown in the figure, the sixth one R6 was to be connected between A and B. It was observed that the current in the circuit is independent of the value of R6. Then what should have been the relations between these resistances?

(NTSE Odisha, Stage-I, 2014-15)

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40. Resistance of a platinum wire is 2 Ω at O0C and 2.5 W at 1000C. Then at what temperature its resistance would be 2.3 Ω? (NTSE Odisha, Stage-I, 2014-15)

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