What is the $SI$ unit of electric potential?

Two resistors are connected in series as shown in the diagram. $(i)$ What is the current through the $5 \, \Omega$ resistor? (ii) What is the current through $R$? (iii) What is the value of $R$? (iv) What is the value of $V$?

What is the equivalent resistance of resistors $R_{1}$ and $R_{2}$ connected in parallel connection?

Why is much less heat generated in long electric cables than in filaments of electric bulbs?

Study the $V - I$ graph for a resistor as shown in the figure and prepare a table showing the values of $I$ (in amperes) corresponding to four different values of $V$ (in volts). Find the value of current $I$ (amperes) for $V=10$ volts. How can we determine the resistance of the resistor from this graph?

In a circuit containing two unequal resistors connected in parallel: