Question

At a particular, a hospital is supplied with 100 A current at 220 V. How many 60 W, 220 Y light bulbs can be switched on in the hospital at the same time if they all are connected in parallel?

• A. 366
• B. 432
• C. 289
• D. 163

Answer 1

The correct option is A 366

Answer is A.
Components connected in parallel are connected so the same voltage is applied to each component. In a parallel circuit, the voltage across each of the components is the same, and the total current is the sum of the currents through each component.
In parallel circuits, each light has its own circuit, so all but one light could be burned out, and the last one will still function. A circuit composed solely of components connected in parallel is known as a parallel circuit.
The current across each bulb is calculated as follows.
P = VI. That is, I = P/V = 60/220 = 0.27 A.
In this case, the total current supplied is 100 A at 220 V. So, the number of light bulbs (x) that can be switched on in the hospital at the same time is calculated as follows.
x = 100/0.27 = 370.
Hence, 366 light bulbs (from the options given) can be switched on in the hospital at the same time.