The SI unit of electric charge is $.........$
Heat dissipated by a conductor when a current is passed through it is directly proportional to the resistance of the conductor.
Three bulbs of $40\, W , 60\, W$ and $100\, W$ are connected in series across the mains. Across which the potential difference is highest? Across which is lowest ?
Two conducting wires of same material, equal length and equal diameter are connected in series. How does the heat produced by the combination of resistance change ?
$(a)$ Derive an expression to find the equivalent resistance of three resistors connected in series. Also, draw the schematic diagram of the circuit.
$(b)$ Find the equivalent resistance of the following circuit