List of top Physics Questions on Faradays laws of induction asked in MHT CET

If the current in a coil changes from \(5\,\text{A}\) to \(2\,\text{A}\) in \(0.1\,\text{s}\) and an average emf of \(30\,\text{V}\) is induced, find the self-inductance.
A coil having ' \(N\) ' turns and resistance ' \(R \Omega\) ' is connected to a galvanometer of resistance ' \(6 \text{ R } \Omega\) '. The magnetic flux linked with this coil changes from \(\phi_1\) weber to \(\phi_2\) weber in time ' \(t\) ' second. The induced current in the circuit is
A coil of area \(3 \text{ m}^{2}\) is at right angles to a magnetic field of \(0.05 \text{ Wb/m}^{2}\). If the field is decreased to \(20%\) of its value in \(10 \text{ s}\) , the induced e.m.f. is.
A coil having ' \(N\) ' turns and resistance ' \(R \Omega\) ' is connected to a galvanometer of resistance ' \(6 \text{ R } \Omega\) '. The magnetic flux linked with this coil changes from \(\phi_1\) weber to \(\phi_2\) weber in time ' \(t\) ' second. The induced current in the circuit is
A coil of area \(3 \text{ m}^{2}\) is at right angles to a magnetic field of \(0.05 \text{ Wb/m}^{2}\). If the field is decreased to \(20%\) of its value in \(10 \text{ s}\) , the induced e.m.f. is.
A coil having ' \(N\) ' turns and resistance ' \(R \Omega\) ' is connected to a galvanometer of resistance ' \(6 \text{ R } \Omega\) '. The magnetic flux linked with this coil changes from \(\phi_1\) weber to \(\phi_2\) weber in time ' \(t\) ' second. The induced current in the circuit is
A coil of area \(3 \text{ m}^{2}\) is at right angles to a magnetic field of \(0.05 \text{ Wb/m}^{2}\). If the field is decreased to \(20%\) of its value in \(10 \text{ s}\) , the induced e.m.f. is.
A coil of area \( 12 \text{ cm}^2 \) has \( 250 \) turns. Magnetic field of \( 0.2 \text{ Wb/m}^2 \) is perpendicular to the plane of the coil. The field is reduced to \( 0.1 \text{ Wb/m}^2 \) in \( 0.1 \text{ second} \). The magnitude of induced e.m.f. in the coil is
The flux linked with the coil at any instant ' t ' is given by \( \phi = 12t^2 - 60t + 275 \). The magnitude of induced e.m.f. at \( t = 3 \text{ second} \) is
Self inductance of solenoid is
A conducting wire of length 2500 m is kept in east-west direction, at a height of 10 m from the ground. If it falls freely on the ground then the current induced in the wire is (Resistance of wire $= 25\sqrt{2} \;\Omega$, acceleration due to gravity $g=10\text{ m/s}^2$, $B_H=2\times10^{-5}\text{ T}$)
The magnetic flux through a loop of resistance 10 $\Omega$ varying according to the relation $\phi=6t^{2}+7t+1$, where $\phi$ is in milliweber, time is in second at time t=1 s the induced e.m.f. is
The self induction ($L$) produced by solenoid of length '$l$' having '$N$' number of turns and cross sectional area '$A$' is given by the formula ($\phi = \text{magnetic flux through one turn}, \mu_0 = \text{permeability of vacuum}$)}
A coil having effective area $A$, is held with its plane normal to magnetic field of induction $B$. The magnetic induction is quickly reduced by $25%$ of its initial value in $2$ second. Then the e.m.f. induced across the coil will be
A wire of length $1\ \text{m}$ is moving at a speed of $2\ \text{m/s}$ perpendicular to a homogeneous magnetic field of $0.5\ \text{T}$. If the ends of the wire are joined to a resistance of $6\ \Omega$, the rate at which work is being done to keep the wire moving at that speed is
A circular coil of radius $R$ has $N$ turns of a wire. The coefficient of self-induction of the coil will be ($\mu_0 = $ permeability of free space)
The magnetic flux (in weber) in a closed circuit of resistance $20\ \Omega$ varies with time $t$ second according to equation $\phi = 5t^2 - 6t + 9$. The magnitude of induced current at $t = 0.2$ second is
A magnetic field of $2 \times 10^{-2}\,\text{T}$ acts at right angles to a coil of area $100\,\text{cm}^2$ with 50 turns. The average e.m.f. induced in the coil is $0.1\,\text{V}$ when it is removed from the field in time $t$. The value of $t$ is
A horizontal wire of mass 'm', length 'l' and resistance 'R' is sliding on the vertical rails on which uniform magnetic field 'B' is directed perpendicular. The terminal speed of the wire as it falls under the force of gravity is ($g =$ acceleration due to gravity)