Navigate

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.

UP2012
admin:

Related Questions

  1. For a given velocity, a projectile has the same range R for two angles of projection.
  2. The velocity v of waves produced in water depends on their wavelength λ, the density
  3. Four point masses, each of value m, are placed at the corners of a square ABCD
  4. A neutron is moving with a velocity u.It collides head on and elastically with an atom
  5. Six molecules have speeds 2 units, 5 units, 3 units, 6 units, 3 units and 5 units