Question
State and explain Joule’s law of heating.
✓
Answer
Joule's law of heating states that heat produced in joule when a current of I amphere flows in a wire of resistance R ohms for time t secounds is
Given by $H = I^2Rt$
Thus the heat produced in a wire is directly proportional to:
Given by $H = I^2Rt$
Thus the heat produced in a wire is directly proportional to:
- Square of current.
- Resistance of wire.
- Time for which current is passed.
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Similar questions
The electrical resistivities of four materials $A, B, C$ and $D$ are given below:
$\text{A}\ -110\times10^{-8}\Omega\text{ m}$
$\text{B}-\ 1.0\times10^{10}\Omega\text{ m}$
$\text{C}-\ 10.0\times10^{-8}\Omega\text{ m}$
$\text{D}-\ 2.3\times10^{3}\Omega\text{ m}$
Which material is:
→$\text{A}\ -110\times10^{-8}\Omega\text{ m}$
$\text{B}-\ 1.0\times10^{10}\Omega\text{ m}$
$\text{C}-\ 10.0\times10^{-8}\Omega\text{ m}$
$\text{D}-\ 2.3\times10^{3}\Omega\text{ m}$
Which material is:
- Good conductor.
- Resistor.
- Insulator, and
- Semiconductor
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i. You are spending more time on Internet/mobile games, phone, etc.
ii. You have to use free space around your house for good purpose.
iii. Your brother studying in Std. XII has developed stress.
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ii. You have to use free space around your house for good purpose.
iii. Your brother studying in Std. XII has developed stress.