Magnetic Fields & Induction

The SI unit of magnetic induction is ...

The direction of the magnetic field around a straight current-carrying wire is determined by ...

An electric charge at rest inside a magnetic field ...

The SI unit of magnetic flux is ...

Faraday's law states that the induced EMF is proportional to ...

Lenz's law states that the induced current ...

The magnetic field strength at a distance of $0.1\text{m}$ from a straight wire carrying $5\text{A}$ is ... $({\mu }_0=4\pi \times 10^{-7}\text{T}\cdot \text{m/A})$

A $0.5\text{m}$ wire carrying $2\text{A}$ lies perpendicular to a $0.4\text{T}$ magnetic field. The Lorentz force on the wire is ...

A solenoid $0.5\text{m}$ long has $1,000$ turns and carries $2\text{A}$. The magnetic induction at its center is ...

A $2\mu \text{C}$ charge moves at $3\times 10^5\text{m/s}$ perpendicular to a $0.5\text{T}$ magnetic field. The Lorentz force on the charge is ...

A $0.5\text{T}$ magnetic field passes perpendicularly through an area of $0.02{\text{m}}^2$. The magnetic flux is ...

The magnetic flux through a coil changes by $0.02\text{Wb}$ in $0.1\text{s}$. The induced EMF is ...

An ideal transformer steps down voltage from $220\text{V}$ to $22\text{V}$. If the primary has $1,100$ turns, the number of secondary turns is ...

When the north pole of a magnet is brought near a coil, the side of the coil facing the magnet becomes a ... pole.

A $0.2\text{m}$ wire is moved perpendicular to a $0.5\text{T}$ magnetic field at $4\text{m/s}$. The induced EMF in the wire is ...

A $100$-turn coil of area $0.01{\text{m}}^2$ is in a magnetic field that changes by $0.2\text{T}$ in $0.05\text{s}$. The average induced EMF is ...

A $0.5\text{H}$ inductor carries $4\text{A}$. The energy stored in the inductor is ...

An ideal transformer has an output power of $5,000\text{W}$ and a secondary voltage of $250\text{V}$. The secondary current is ...

Two parallel wires carry $2\text{A}$ and $4\text{A}$ and are separated by $0.2\text{m}$. The force per unit length between them is ...

A $200$-turn coil of area $0.02{\text{m}}^2$ rotates at $50\text{rad/s}$ in a $0.1\text{T}$ magnetic field. The maximum EMF produced is ...