Compute the heat generated while transferring $96000$ coulomb of charge in one hour through a potential difference of $50\, V$.

$A$ copper wire has a diameter of $0.5\, mm$ and a resistivity of $1.6 \times 10^{-8}\, \Omega \, m$. What will be the length of this wire to make its resistance $10\, \Omega$? How much does the resistance change if the diameter is doubled?

What is meant by saying that the potential difference between two points is $1$ $V$?

Draw a schematic diagram of a circuit consisting of a battery of three cells of $2\, V$ each,a $5 \,\Omega $ resistor,an $8\,\Omega $ resistor,and a $12\,\Omega $ resistor,and a plug key,all connected in series.

How can three resistors of resistances $2 \,\Omega$,$3 \,\Omega$,and $6 \,\Omega$ be connected to give a total resistance of $4 \,\Omega$?

Draw a schematic diagram of a circuit consisting of a battery of three cells of $2\, V$ each,a $5\,\Omega$ resistor,an $8\,\Omega$ resistor,and a $12\,\Omega$ resistor,and a plug key,all connected in series. Include an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the $12\,\Omega$ resistor. What would be the readings in the ammeter and the voltmeter?