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12. Electricity
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Q13 of 35 Page 90

The resistivity does not change if

The resistivity depends on the nature of the material and temperature. It doesn’t vary with the shape of the resistor.

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11

A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively (Figure.12.5). Which of the following is true?

12

If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be

14

In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?

15

In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be

Questions · 35
12. Electricity
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