Question

1. A coil in the heater consume power P on passing current. If it is cut into halves and joined in parallel, it will consume ---------power? *
PLEASE ANSWER IT.
GRADE 10--PHYSICS

Answer 1

Answer:

4P

Explanation:

Let the resistance of the rod be R. If the rod is divided into two equal parts, then each part of the rod will have a resistance of R/2. Now these two parts of the rod are connected in parallel and a voltage V is applied across them.

Hence the total power consumed is :

P' = (V²/R/2) + (V²/R/2)

  = (2V²/R/2)

 = 4V²/R

= 4(V²/R)

= 4P (∵Where P = V²/R)

Therefore, it will consume 4P Power.

Hope it helps!

Answer 2

Answer:. 4P. .

Hope it will help you for mcqs.