Question

A tangent galvanometer has a coil of 25 turns and a radius of 15 cm. The horizontal component of the earth's magnetic field is 3 × 10^–5 T. The current required to produce a deflection of 45⁰ in it is-

• A. 0.29 A
• B. 3.6 × 10^–5 A
• C. 1.2 A
• D. 0.14 A

Answer 1

Answer: (A)

0.29 A

Answer 2

B = H tan q Ž= H tanq

\ i =tanq