Question

two lamps one rated 100w at 220v and other 60w at 220v are connected in parallel to electric main supply . what current is drawn from the line if the supply voltage is 220v ?​

Answer 1

Explanation:

Power = P = 100 W

Voltage = V = 220v

Resistance = R

P = V²/R

100 = 220 ×220/R

R  = 220 × 220/100

     = 484 Ω

==========================

Power = P = 60 W

Voltage = V = 220v

Resistance = R

P = V²/R

60 = 220 × 220/R

R = 220× 220/60

    = 806.7 Ω

=========================

As the resistors are connected in parallel , 

total resistance = 1/R

1/R = 1/484 + 1/806.7

      =  806.7 + 484/484×806.7

      = 1290.7/390442.8

R = 390442.8/ 1290.7 = 302.5 ohms

    

  Total resistance = 302.5 Ω

I = current

V = IR

220 = I × 302.5

I = 220/302.5

   = 0.73 A

The current drawn is 0.73 A

Read more on Brainly.in - https://brainly.in/question/1295223#readmore

Answer 2

Answer:

your answer is in pic

Explanation:

BTS ARMY