An electric motor runs on DC source of emf 200 V and draws a current of 10 A.

An electric motor runs on DC source of emf 200 V and draws a current of 10 A. If the efficiency be 40%, then the resistance of armature is

Options

(a) 2Ω
(b) 8Ω
(c) 12Ω
(d) 16Ω

Correct Answer:

12Ω

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

admin:

Related Questions

  1. Sodium and copper have work function 2.3 eV and 4.5 eV respectively
  2. A particle is executing the motion x=Acos (ωt-θ). The maximum velocity of the particle is
  3. The maximum kinetic energy of the photoelectrons depends only on
  4. Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary
  5. A black body is heated from 27° C to 127° C. The ratio of their energies of radiations