Question
A rectangular coil of a moving coil galvanometer contains 50 turns each having area \(12 cm ^2\). It is suspended in radial magnetic field \(0.025 Wb / m ^2\) by a fibre of twist constant \(15 \times 10^{-10} N - m /\) degree. Calculate the sensitivity of the moving coil galvanometer.

Answer

Get the step-by-step solution for this question inside the Vidyadip app.

Get the answer in the app

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The tube of a mercury barometer is $1 \mathrm{~cm}$ in diameter. What correction due to capillarity is to be applied to the barometric reading if the surface tension of mercury is $435.5 \mathrm{dyn} / \mathrm{cm}$ and the angle of contact of mercury with glass is $140^{\circ}$ ? [Density of mercury $=13600 \mathrm{~kg} / \mathrm{m}^3$ ]
Two wires shown in the figure are connected in a series circuit and the same amount of current of $10\ A$ passes through both, but in apposite directions. Separation between the two wires is $8\ mm$ . The length $A B$ is $S =22 cm$. Obtain the direction and magnitude of the magnetic field due to current in wire $2$ on the section $A B$ of wire $1$ . Also obtain the magnitude and direction of the force on wire $1$. $\left[\mu_0=4 \pi \times 10^{-7} T . m / A \right]$

Image
A gas with adiabatic constant $\gamma=1.4$, expands adiabatically so that the final pressure becomes half the initial pressure. If the initial volume of the gas $1 \times 10^{-2} m ^3$, find the final volume.
A perfect blackbody, maintained at $27^{\circ} \mathrm{C}$, radiates energy at the rate of $551.1 \mathrm{~W}$. Find the surface area of the body.
How does the frequency of an SHM vary with
1. the force constant $k$
2. the mass of the particle performing SHM ?
The diffraction pattern of a single slit of width $0.5 cm$ is formed by a lens of focal length 40 $cm$. Calculate the distance between the first dark and the next bright fringe from the axis. The wavelength of light used is 4890 Å.
Distinguish between electric field intensity and electric potential.
A bar magnet is dropped vertically through a thick copper ring as shown. What is the direction of the force exerted by the coil on the magnet? Explain.
Image
Explain the working of a transistor as a switch.
A coil of self inductance $3 H$ and resistance $100 \Omega$ carries a steady current of $2 A$. (a) What is the energy stored in the magnetic field of the coil? (b) What is the energy per second dissipated in the resistance of the coil ?