Question

Type: NAT
Three identical bulbs connected in series across
a supply source together dissipated power P. If
the same bulbs are connected in parallel across
the same source, they together dissipate power
np. Find the value of n.​

Answer 1

Answer:

n=9

Explanation:

In the case of series connection:

1. P=V^2/3R=V^2/R=3P

In case of parallel connection:

2. P'=V^2/(R/3)=3(V^2/R)

Substitute equation 1 in equation 2

3P=3X=9P

The ,n=9