Flashcards: Moving Charges and Magnetism — 10 cards

What is the formula for magnetic force on a charged particle?

$F=qvB\sin\theta$ where $\theta$ is the angle between velocity and magnetic field.

What is the radius formula for a charged particle in circular motion in a magnetic field?

$r=\frac{mv}{qB}$

What is the formula for force on a straight current-carrying conductor in a magnetic field?

$F=BIl\sin\theta$

How do parallel currents flowing in opposite directions interact?

They repel each other.

What is the formula for magnetic field from a long straight current conductor?

$B=\frac{\mu_0 I}{2\pi r}$

What formula expresses the magnetic dipole moment of a coil?

$M=NIA$

What is the formula for magnetic field at a circular loop's centre with N turns and radius R?

$B=\frac{\mu_0NI}{2R}$

What does Ampere's circuital law state about the line integral of magnetic field?

It equals $\mu_0I$ around a closed path.

What is the formula relating magnetic and restoring torque in a moving-coil galvanometer?

$NIAB=k\theta$

How is the parallel shunt resistance calculated to convert a galvanometer into an ammeter?

$S=\frac{I_gG}{I-I_g}$