A potential difference of 6v is used to produce a current of 5A for 200s through a heating coil. The heat produced is

  • A 4800 cal
  • B 6000 cal
  • C 2400J
  • D 240k cal
  • E 6000J
jamb 1978physics

The correct answer is E. 6000J

To calculate the heat produced by the heating coil, we can use the formula:
Heat (Q) = I^2 * R * t

Given:Potential difference (V) = 6VCurrent (I) = 5ATime (t) = 200s

First, we need to find the resistance (R) of the heating coil using Ohm's Law:

V = I * RR = V / IR = 6V / 5AR = 1.2 ohms

Now, we can calculate the heat produced:

Q = I^2 * R * tQ = (5A)^2 * 1.2 ohms * 200sQ = 25 * 1.2 * 200Q = 6000 J

Therefore, the heat produced by the heating coil is 6000 J.

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