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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic torque & energyMedium2 minQB

PhysicsMediumsingle choice

The current sensitivity of a galvanometer can be increased by :
(A) decreasing the number of turns
(B) increasing the magnetic field
(C) decreasing the area of the coil
(D) decreasing the torsional constant of the spring

Choose the most appropriate answer from the options given below :

Options:

Answer:

Solution:

The current in the galvanometer is calculated by $i = (\frac{K}{N A B}) θ$ .
Therefore, the sensitivity of the galvanometer,
$\frac{d θ}{d i} = \frac{N A B}{K}$
Hence, only options B and D are correct.

Stream:JEESubject:PhysicsTopic:MagnetismSubtopic:Magnetic torque & energy

⏱ 2mℹ️ Source: QB

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