A child has drawn the electric circuit to study Ohm’s law as shown in Figure. His teacher told that the circuit diagram needs correction. Study the circuit diagram and redraw it after making all corrections.

State $Ohm's$ law. Calculate the resistance of a conductor, if the current flowing through it is $0.2 \,A$ when the applied potential difference is $0.8\, V$.

$(a)$ Define potential difference between two points in a conductor.

$(b)$ Name the instrument used to measure the potential difference in a circuit. How is it connected ?

$(c)$ A current of $2\, A$ passes through a circuit for $1$ minute. If potential difference between the terminals of the circuit is $3 \,V,$ what is the work done in transferring the charges ?

A current of $1$ ampere flows in a series circuit containing an electric lamp and a conductor of $5\,\Omega $ when connected to a $10\, V$ battery. Calculate the resistance of the electric lamp.

Now if a resistance of $10\,\Omega $ is connected in parallel with this series combination, what change (if any) in current flowing through $5\,\Omega $ conductor and potential difference across the lamp will take place? Give reason.

$(a)$ Derive the formula for the calculation of work done when current flows through a resistor

$(b)$ One electric bulb is rated $40\, W$ and $240\, V$ and other $25\, W$ and $240\, V$. Which bulb has higher resistance and how many times ?

$1\, \mu \,A =\ldots \ldots \ldots \,m\, A$