Two bulbs when connected in parallel to a source take 60W each, the power consumed,

Two bulbs when connected in parallel to a source take 60W each, the power consumed, when they are connected in series with the same source is

Options

(a) 15W
(b) 30W
(c) 60W
(d) 120W

Correct Answer:

30W

Explanation:

In series, P = P₁P₂ / P₁+P₂
Given: P₁ = P₂ = 60
Therefore, Power P = (60 × 60) / (60 × 60) = 30 W.

admin:

Related Questions

  1. The velocity of a particle at an instant is 10 ms⁻¹.After 3 s its velocity will become
  2. Two point charges +2 coulomb and +10 coulomb repel each other with a force of 12 N.
  3. A parallel plate capacitor with air between the plates has a capacitance of 9 pF.
  4. A stone falls freely under gravity.It covers distances h₁,h₂ and h₃
  5. A body undergoes no change in volume. Poisson’s ratio is