Electromagnetism Test. 6

Similar to resistors in series, inductances in series add up (assuming no mutual inductance).

This branch of physics deals with the phenomena and properties of stationary or slow-moving electric charges with no acceleration.

Lenz's Law is specifically used to determine the direction of the induced current by stating that it will flow in a direction that opposes the change in flux that created it.

Using E = 1/2 LI². E = 0.5 * (80 x 10⁻³ H) * (5 A)² = 0.5 * 0.08 * 25 = 1.0 J.

Using Φ = BAcos(θ). Since the field is perpendicular to the surface, the angle θ with the normal is 0°, and cos(0°)=1. So, Φ = (0.5 T) * (0.2 m²) = 0.1 Wb.

This condition ensures that the magnetic field inside is strong and uniform, and the field outside is negligible, which is the definition of an ideal solenoid.

The radius of the circular path is given by r = mv/qB. Therefore, for a given velocity, field, and charge, the radius is directly proportional to the mass. This allows separation of isotopes.

Due to the commutator action, the output voltage rises from zero to a maximum and back to zero, but always with the same polarity. This creates a pulsating DC.

The force is given by F=qvBsin(θ). The sine function is maximum (value of 1) when the angle θ is 90 degrees.

Cutting a magnet simply creates two smaller magnets, each complete with its own north and south pole.