Question

A tangent galvanometer has a coil with 50 turns

Answer 1

Explanation:

Given A tangent galvanometer has a coil with 50 turns and radius equal to 4 cm. A current of 0.1 A is passing through it. The plane of the coil is set parallel to earth’s magnetic meridian. If the value of earth’s horizontal component of magnetic field is 7 x 10^5 tesla and μo = 4π x 10^-7 W / amp x m then the deflection in the galvanometer needle will be

• In a tangent galvanometer current I = 2 r B tan theta / μo n (in horizontal direction)
• So tan theta = I μo n / 2 R B  
•                   = 0.1 x 4 π x 10 ^-7 x 50 / 2 x 4 x 10^-2 x 7 x 10^-5
•                   = 1.12
• So tan theta = 1.12
• Or theta = tan^-1 1.12
• Or theta = 48.2 degree

Reference link will be

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