Question

a 75 ohms lamp and 150 heater are connected in parallel across a 150v

a. What is total resistance
b. What is the current across each resistor
c. what is total current

Answer 1

Explanation:

a.1/R=1/75+1/150

1/R=(2+1)/150

1/R=3/150

1/R=50

R=50

c. R=V/I

I=V/R

I=150/50

I=3 A

b. current in lamp=150/75

=2

current in heater=150/150

=1