Version 1B 12312 The dtamce of a Slameut that carries 2 A when a 10 V potential

Question

Version 1B 12312 The dtamce of a Slameut that carries 2 A when a 10 V potential dierence it is b. 52 more than 20 . 8. 1172 A resistor is made of a matecial that has a resistivity tht is propoet tional to the current going through it. If the voltage across the resistor is doubled, what happens to the current theough it? s. It doubles b. It quadruples. c. It increases by a factor of 2/2 d. It increases by a factor of 21 9. (23113) Removed. Free point. 10. 123118) When you turn on a lamp, the initial current in its Slament is greater at first, rather than a moment later, which indicates a. something is faulty b. a time delay for current attaining its average speed. c increased temperature means increaeed resistance d. nothing of interest 11. [23122] The voltage across a 10-1t resistor carrying 5A is a. &V b. 10V c 15V d. 20V e. more than 20 V. 12. I 17122] A light bulb has resistance of 260 when operating at 130 V. Find the current in the light bulb. a. 2A b. 0.25 A c. 0.5A d. 0.7A e 1.4A 13. [u7301 Ten coulombs of charge start from the negative terminal of a battery, l m the negative terminal of a battery, flow through the battery and then leave the positive terminal through a wire, Blow through a resistor and then return to the starting point on this closed circuit. In this complete process, the ten coulombs a. do positive work on the battery b, receive heat energy from the resistor. c. have a net loss of potential energy d. have no net change in potential energy.

Explanation / Answer

7. R= V/i= 10/2= 5 ohm

8. As resistivity is directly proportional to i,

And R is directly proportional to resistivity so

R is directly proportional to i

Also from ohm's law

V= iR

V is directly proportional to squarr of current

Is volatge doubled its value

current increases by a factor 2^(1/2)

Option (c) is correct

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10. Option (b) is correct.

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11. V= 10*5= 50 V

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12. I= 130/260= 0.5 A

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13. Option (c) is correct

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Comment in case any doubt... Good luck

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