What is the power of a bulb rated at $2.5 \,V$ $500\, mA$ ?
The unit of measurement of charge is coulomb.
State with the help of a circuit diagram an activity to find the resistance ${ }^{\prime} R^{\prime}$ of a given wire. A current of $0.2\, A$ passes through a resistor of $20 \Omega$. Find the potential difference across its ends.
Three incandescent bulbs of $100\, W$ each are connected in series in an electric circuit. In another circuit another set of three bulbs of the same wattage are connected in parallel to the same source. Now let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.
You are qiven three bulbs of $25 \,W , 40\, W$ and $60 \,W$ marked at $220\, V$. Which one of them has lowest resistance ?