List of top Physics Questions on Faradays laws of induction

List-I contains four conducting loops lying in the \(XY\) plane, as shown in the figures. The loops are rotating about \(Z\)-axis passing through the point \(O\) with time period \(T\) in clockwise direction. The region \(x>0\) contains a uniform magnetic field \(B\) in the \(+z\) direction. List-II contains the qualitative variation of the induced current \(i(t)\) for each of these loops. Choose the option which describes the correct match between the entries in List-I to those in List-II.
A uniform but time varying magnetic field is present in a circular region of radius 'R'. The magnetic field is perpendicular and into the plane of loop and the magnitude of field is increasing at a constant rate \( \alpha \). There is a straight conducting rod of length 2R placed as shown in figure. The magnitude of induced emf across the rod is

A metallic circular loop is placed with its plane perpendicular to a uniform magnetic field of $3\text{ T}$. If the radius of the loop decreases at a constant rate of $2\text{ mm s}^{-1}$, what will be the induced emf in the loop when the radius of the loop becomes $5\text{ cm}$?
According to Faraday's law, the induced E.M.F generated in a closed loop is equal to the \dots
The SI unit of self-inductance is:
If the current in a coil changes from \(2\,\text{A}\) to \(4\,\text{A}\) in \(0.1\,\text{s}\), inducing an EMF of \(20\,\text{V}\), find the self-inductance.
A coil has a self-inductance of \(2H\); find the induced EMF if the current changes from \(5A\) to \(2A\) in \(0.1\) seconds.
If the current in a coil changes from \(2A\) to \(4A\) in \(0.1\,s\), inducing an EMF of \(20V\), find the self-inductance.
If the current in a coil of inductance $10,mH$ is increased from $1,A$ to $5,A$ in $0.2,s$, then the emf produced in it is
If an emf of 2 V is induced in a coil in 6 s, then the change of flux (in Wb) in the coil during the time is
The law that is a symmetrical counterpart of Faraday’s law of electromagnetic induction is
A circular coil of radius 10cm with 200 turns is placed $\perp$r to uniform magnetic field of 1.4T. IF magnetic field reduced to zero in 0.2s, what is the average induced emf
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.
The power required to push the arm of a rectangular conductor with a constant speed \(v\) in a motor is directly proportional to
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.
The self-inductance of an air core solenoid is \( L \). If the number of turns in the solenoid is doubled, keeping all other factors constant, then its self-inductance will be
A rectangular coil of 250 turns has an average area of \( 20 \, cm \times 15 \, cm \). The coil rotates with a speed of 60 cycles per second in a uniform magnetic field of \( 2 \times 10^{-2} \, T \) about an axis perpendicular to the field. The peak value of the induced emf is:
A current of 2 A is passed through the primary coil. The total flux linked with the secondary coil, which is closely wound over the primary is \( 2000 \times 10^{-6} \, \text{weber} \). What is the induced emf in the secondary if the current through the primary increases at a rate of \( 0.2 \, \text{A s}^{-1} \)?
A circular coil of area \( 2\sqrt{2} \, \text{cm}^2 \) and resistance \( 2\Omega \) is arranged vertically in the east-west direction. A uniform magnetic field \( 0.2 \, \text{T} \) is set up across the plane in the north to east direction. Now the magnetic field is removed at a steady rate in \( 0.4 \, \text{s} \). What is the current developed in the coil?
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.
The mismatched pair regarding the induced emf is