Electromagnetic Induction

The variation of EMF with time for four types of generators are shown in the figures. Which amongst them can be called AC? (a) (b) (c) (d)

Two conducting circular loops of radii $R_{1}$ and $R_{2}$ are placed in the same plane with their centres coinciding. If $R_{1}\gg\,R_{2}$, the mutual inductance $M$ between them will be directly proportional to:

A conducting bar of length $L$ is free to slide on two parallel conducting rails as shown in the figure Two resistors $R_{1}$ and $R_{2}$ are connected across the ends of the rails. There is a uniform magnetic field…

A $10m$ long horizontal wire extends from North East to South West. It is falling with a speed of $5.0ms^{-1},$ at right angles to the horizontal component of the earth's magnetic field of…

A square loop of side $20\mathrm{cm}$ and resistance $1\Omega\,$ is moved towards right with a constant speed $v_{0}.$The right arm of the loop is in a uniform magnetic field of $5T.$The field is perpendicular to the…

An insulated copper wire of $100$turns is wrapped around a wooden cylindrical core of the cross-sectional area $24\mathrm{cm}^{2}$. The two ends of the wire are connected to a resistor. The total resistance in the…

A square shaped coil of area $70\mathrm{cm}^{2}$having $600$ turns rotates in a magnetic field of $0.4\mathrm{Wb}m^{-2}$, about an axis which is parallel to one of the side of the coil and perpendicular to the direction…

Two concentric circular coils with radii$1\mathrm{cm}$ and $1000\mathrm{cm}$ and number of turns $10$ and $200$respectively are placed coaxially with centers coinciding. The mutual inductance of this arrangement will be…

A coil of $200$turns and area $0.20m^{2}$is rotated at half a revolution per second and is placed in uniform magnetic field of $0.01T$ perpendicular to axis of rotation of the coil. The maximum voltage generated in the…

The inductance between A and D is

Two coils of self inductance$L_{1}$ and$L_{2}$are connected in series combination having mutual inductance of the coils as$M$. The equivalent self inductance of the combination will be

A conducting square loop of side $L$ and resistance $R$ moves in its plane with a uniform velocity $v$ perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and…