$A$ thermocouple uses Bismuth and Tellurium as the dissimilar metals. The sensitivity of Bismuth is $-72\,\mu V/{^oC}$ and that of Tellurium is $500\,\mu V/{^oC}$. If the difference between hot and cold junction is $100\,{^oC}$, then the maximum output will be ............... $mV$.

For what value of the resistor $X$ will the equivalent resistance of the two circuits shown be the same?

The terminal voltage $V$ across a battery of $emf$ $E$ and internal resistance $r$ can be:

If an electric current is passed through a nerve of a man, then the man:

Find the percentage error in the reading of the voltmeter shown in the circuit. (in $\%$)

Silver and copper voltameters are connected in parallel with a battery of $e.m.f.$ $12\, V$. In $30$ minutes,$1\, g$ of silver and $1.8\, g$ of copper are liberated. The power supplied by the battery is ...................... $J/s$ ($Z_{Cu} = 6.6 \times 10^{-4}\,g/C$ and $Z_{Ag} = 11.2 \times 10^{-4}\,g/C$).