TS EAMCET20184 May 2018Evening ShiftPhysicsMagnetic Effects of CurrentActual
A moving coil galvanometer has a rectangular wire coil of enclosed area 0.001 ~m ^2 and 500 turns. The coil operates in a radial magnetic field of 0.2 ~T and carries a current of 6 10⁻⁸ ~A . If the torsional spring constant is 6 10⁻⁷ ~N - m / rad , then the angular deflection of the coil in radians is
Options
- A100
- B200
- C300
- D400
Correct answer
A. 100
Step-by-step solution
Angular deflection of a moving coil galvanometer is given by aligned & = ( N B A k ) i & = 500 0.2 0.001 6 10⁻⁷ 6 10⁻⁸ & = 5 0.2 10⁻¹ 6 10⁻⁸ 6 10⁻⁷ & = 100 aligned