State the factors on which the resistance of a cylindrical conductor depends, How will resistance of a conductor change if it is stretched so that its length is doubled ?
State the factors on which the resistance of a cylindrical conductor depends, How will resistance of a conductor change if it is stretched so that its length is doubled ?
The resistance of a cylindrical conductor depends upon
$(i)$ its length, and
$(ii)$ its area of cross-section.
When a conductor is stretched to twice its original length, then the new resistance becomes $R _{ N }=n^{2} R ,$ where $n$ is the times the conductor is stretched. since $n=2,$ therefore, $R _{ N }=4 R$
Similar Questions
What is meant by $1$ ohm resistance ?
What is meant by $1$ ohm resistance ?
What is the equivalent resistance of resistors $R_{1}$ and $R_{2}$ connected in parallel connection?
What is the equivalent resistance of resistors $R_{1}$ and $R_{2}$ connected in parallel connection?
If $R_{1}$ and $R_{2}$ are the resistances of filaments of a $400\, W$ and a $200\, W$ lamp, designed to operate on the same voltage, then
If $R_{1}$ and $R_{2}$ are the resistances of filaments of a $400\, W$ and a $200\, W$ lamp, designed to operate on the same voltage, then
A bulb is rated at $5.0\, V , 100 \,mA$. Calculate its
$(i)$ power and $(ii)$ resistance.
A bulb is rated at $5.0\, V , 100 \,mA$. Calculate its
$(i)$ power and $(ii)$ resistance.
Define electrostatic potential at a point.
Define electrostatic potential at a point.