A coil with an area of 500 cm^2 and 1000 tur | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The induced $emf$ is given by Faraday's law: $e = -N \frac{d\phi}{dt} = -N \frac{\phi_2 - \phi_1}{\Delta t}$.Here,$\phi = BA \cos 	heta$.Initial

Vedclass · Accepted Answer

$10$

Vedclass · Answer

(B) The induced $emf$ is given by Faraday's law: $e = -N \frac{d\phi}{dt} = -N \frac{\phi_2 - \phi_1}{\Delta t}$.Here,$\phi = BA \cos 	heta$.Initial flux $\phi_1 = BA \cos 0^o = BA$.Final flux $\phi_2 = BA \cos 180^o = -BA$.Change in flux $\Delta \phi = \phi_2 - \phi_1 = -2BA$.Given: $N = 1000$,$A = 500 \ cm^2 = 500 	imes 10^{-4} \ m^2 = 0.05 \ m^2$,$B = 2 	imes 10^{-5} \ Wb/m^2$,$\Delta t = 0.2 \ s$.$e = -N \frac{-2BA}{\Delta t} = \frac{2NBA}{\Delta t}$.$e = \frac{2 	imes 1000 	imes 2 	imes 10^{-5} 	imes 0.05}{0.2} = \frac{0.002}{0.2} = 0.01 \ V$.$0.01 \ V = 10 \ mV$.

$A$ coil with an area of $500 \ cm^2$ and $1000$ turns is placed in a magnetic field of $2 \times 10^{-5} \ Wb/m^2$ perpendicular to its plane. If the coil is rotated by $180^o$ in $0.2 \ s$,the induced $emf$ in $milli-volts$ is:

Similar Questions

Which scientist showed that by changing magnetic field an electric field can be obtained?

In a closed circuit, there is only a coil of inductance $L$ and resistance $100 \Omega$. The coil is situated in a uniform magnetic field. Suddenly, the magnetic flux linked with the circuit changes by $5 \text{ Wb}$. What amount of charge will flow in the circuit as a result?

The magnetic flux linked with a coil,in webers,is given by the equation $\phi = 3t^2 + 4t + 9$. The magnitude of the induced $e.m.f.$ at $t = 2 \ s$ will be $...... \ V$.

When a conducting wire $XY$ is moved towards the right,a current flows in the anti-clockwise direction in the loop. The direction of the magnetic field at point $O$ is

If a coil of $40$ turns and area $4 \, cm^2$ is suddenly removed from a magnetic field,it is observed that a charge of $2 \times 10^{-4} \, C$ flows through the coil. If the resistance of the coil is $80 \, \Omega$,the magnetic flux density in $Wb \, m^{-2}$ is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module