Why is heat produced when a current is passed through a conductor ?
Why is heat produced when a current is passed through a conductor ?
During their motion, the electrons collide with one another and hence lose some kinetic energy. This loss in kinetic energy is dissipated as heat across the conductor.
Similar Questions
How much work is done in moving a charge of $2$ coulomb from a point at $118$ volt to a point at $128$ volt ?
How much work is done in moving a charge of $2$ coulomb from a point at $118$ volt to a point at $128$ volt ?
$(a)$ Resistivity of iron is $10 \times 10^{-8} \;\Omega m$ and of mercury is $94 \times 10^{-8}\; \Omega m$. Which among iron and mercury is a better conductor ? Give reason.
$(b)$ Resistivity of a material $A$ is in the range of $10^{10}-10^{\text {14 }} \;\Omega m$ while that of $B$ is in the range of $10^{-6}-10^{-8} \;\Omega$ m. Which of the two will behave as an insulator and why?
$(a)$ Resistivity of iron is $10 \times 10^{-8} \;\Omega m$ and of mercury is $94 \times 10^{-8}\; \Omega m$. Which among iron and mercury is a better conductor ? Give reason.
$(b)$ Resistivity of a material $A$ is in the range of $10^{10}-10^{\text {14 }} \;\Omega m$ while that of $B$ is in the range of $10^{-6}-10^{-8} \;\Omega$ m. Which of the two will behave as an insulator and why?
Why alloys are used to make standard resistors ?
Why alloys are used to make standard resistors ?
When is potential difference between two points said to be $1$ volt ?
When is potential difference between two points said to be $1$ volt ?
What are the factors on which resistance of a conductor depends ?
What are the factors on which resistance of a conductor depends ?