Question

If in a 200V line maximum 5A current can pa ss ,How many bulbs of power 100W can inserted in the circuit paralleled?​

Answer 1

Explanation:

Here

Potential difference =V=200 volts

P=100w

$\boxed{\sf I=\dfrac{P}{V}}$

$\\ \qquad\quad\sf{:}\longrightarrow I =\dfrac{100}{200}=\dfrac{1}{2}A$

Let

number of bulbs =n

• As it will be parallel connection hence the electric current remains same.

$\\ \qquad\quad\sf{:}\longrightarrow n\times 1=5 A$

$\\ \qquad\quad\sf{:}\longrightarrow n\times \dfrac{1}{2} A=5A$

$\\ \qquad\quad\sf{:}\longrightarrow n=(5\times 2)$

$\\ \qquad\quad\sf{:}\longrightarrow n=10$

Hence

• 10 bulbs can be inserted

Answer 2

Answer

Power (P)= voltage(v)×current(i)=100W

i= 100/220 =0.45A

Number of bulbs that can be safely operated through a 5A fuse =

5/0.45 =11