Question

Several electric bulbs designed to be used on a 220 V electric supply line are rated 10 W each. How many bulbs can be connected in parallel with each other across the two wires of 220 V line if the maximum allowable current is 5 A?​

Answer 1

Answer:

Maximum 110 bulbs can be connected.

Explanation:

Let n be the required number of bulbs

Resistance of each bulb R = V²/P = 220 x 220/10 = 4400 Ω

Maximum allowable current I$_{max}$ = 5 A

Equivalent resistance of parallel combination R$_{eq}$ = R/n = 4400/n Ω

For safe operation V = I$_{max}$ x Req

                               220 = 5 x $\frac{220 X 22}{n}$

                                  n = 22x 5

                                     = 110

∴ Maximum 110 bulbs can be connected .

                                 

Answer 2

Answer:

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.