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A Current of 0.2 a Flows Through a Wire Whose Ends Are at a Potential Difference of 15 V. Calculate: (I) the Resistance of the Wire, and (Ii) the Heat Energy Produced in 1 Minute. - Physics

Numerical

A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V. Calculate:
(i) The resistance of the wire, and
(ii) The heat energy produced in 1 minute.

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Solution

Given, current, I= 0.2 A; p.d. = 15 V

(i) A/C to Ohm's law

V=IR

R = `"v"/"I" = 15/0.2 = 75 Omega`

(ii) energy produced in one minutes is:

H=I2 Rt = (0.2)2 x 75 x 60 =180 J

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APPEARS IN

Frank ICSE Class 10 Physics Part 2
Chapter 4 Current Electricity
Exercise 4.2 | Q 12 | Page 188
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