# If the Current is Doubled, the Deflection is Also Doubled in - Physics

MCQ

If the current is doubled, the deflection is also doubled in

#### Options

• a tangent galvanometer

• a moving-coil galvanometer

• both

• none

#### Solution

a moving coil galvanometer

The current and deflection dependence of a moving coil galvanometer is given by i = k/(nAB)θ ⇒ i ∝ θ

Therefore, if we double the current, the deflection also gets doubled.
However, in a tangent galvanometer, i ∝ tan θ;  that is, there is no direct relation between θ and current.
Hence, the correct option is (b).

Is there an error in this question or solution?

#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 14 Permanent Magnets
MCQ | Q 12 | Page 276