Dr. Sunil Kushwaha Solutions for Chapter: Electricity, Exercise 3: Test Yourself

When the length of a conductor is doubled, how does the resistance of the conductor change?

When the cross-sectional area of a conductor is doubled, how does the resistance of the conductor change?

$\mathrm{V}-\mathrm{I}$ graph of a conductor is a straight line, with $\mathrm{V}$ on $\mathrm{X}$- axis and $\mathrm{I}$ on $\mathrm{Y}$- axis, what does the slope of line represent?

Why does the filament of bulb is made of tungsten?

What is the difference between resistance and resistivity?

Why are copper and aluminium metals used for making electrical wires?

Give one example of ohmic conductor.

What is a superconductor?