The resistance of a metal conductor increases with temperature due to

The resistivity of Nichrome is $10^{-6}\mathrm{\Omega }-m10^\{-6\}\; \backslash \; \backslash Omega-m$. The wire of this material has radius of 0.1 mm with resistance $100\mathrm{\Omega }100\; \backslash \; \backslash Omega$, then the length will be

Given a current carrying wire of non-uniform cross-section. Which of the following is constant throughout the length of the wire?

The e.m.f. of a cell of negligible internal resistance is 2 V. It is connected to the series combination of $2\mathrm{\Omega },3\mathrm{\Omega }2\; \backslash \; \backslash Omega,\; 3\; \backslash \; \backslash Omega$ and $5\mathrm{\Omega }5\; \backslash \; \backslash Omega$ resistances. The potential difference across $3\mathrm{\Omega }3\; \backslash \; \backslash Omega$ resistance will be

A  potential difference of 20 V is applied across a conductance of 8 ohm. The current in the conductor is

If an increase in length of copper wire is 0.5% due to stretching, the percentage increase in its resistance will be

If a certain piece of copper is to be shaped into a conductor of minimum resistance, its length (L) and cross-sectional area A shall be respectively

A given resistor has the following colour scheme of the various strips on it: Brown, black, green and silver. Its value in ohm is

A given carbon resistor has the following colour code of the various strips: Orange, red, yellow and gold. The value of resistance in ohm is

A typical thermistor can easily measure a change in temperature of the order of