Question
The current sensitivity of a tangent galvanometer is increased if(a) magnetic field increases(b) number of turns in the coil increases(c) number of turns in the coil decreases(d) the radius of the coil increases
Step 1
Step 1: The current through the tangent galvanometer is given by the equation $I = \frac{BHR}{K}$, where $B$ is the magnetic field, $H$ is the magnetic field strength, $R$ is the radius of the coil, and $K$ is a constant. Show more…
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A tangent galvanometer has a coil of 25 turns and a radius of $15 \mathrm{~cm}$. The horizontal component of the earth's magnetic field is $3 \times 10^{-5} \mathrm{~T}$. The current required to produce a deflection of $45^{\circ}$ in it is (a) $0.29 \mathrm{~A}$ (b) $0.14 \mathrm{~A}$ (c) $1.2 \overline{\mathrm{A}}$ (d) $3.6 \times 10^{-5} \mathrm{~A}$
Magnetostatics
Round 1
A bar magnet approaches a coil as shown. (a) In which direction does current flow through the galvanometer as the magnet approaches? (b) How does the magnitude of the current depend on the number of turns in the coil? (The resistance of the coil is negligible compared with the resistance of the galvanometer.) (c) How does the current depend on the speed of the magnet? (d) Would the experiment give similar results if the magnet remains stationary and the coil moves to the left instead? Explain.
If the current through a solenoid increases, the magnetic field strength of the solenoid (A) decreases (B) increases (C) remains the same
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