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3. current electricity — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics3. current electricity1 Mark
MCQ
Which of the following statement is false
  • A
    Heat produced in a conductor is proportional to its resistance
  • B
    Heat produced in a conductor is proportional to the square of the current
  • ✓
    Heat produced in a conductor is proportional to charge
  • D
    Heat produced in a conductor is proportional to the time for which current is passed
✓

Answer

Correct option: C.
Heat produced in a conductor is proportional to charge
c
$H = {i^2}Rt$ and $i = \frac{q}{t}$.

Hence $H = \frac{{{q^2}R}}{t}$ ;

$\therefore \,\,H \propto \,{q^2}$

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