Electricity and Magnetism Answers

A light ray incident on a plane mirror is at an angle 65° relative to the mirror surface. At what angle is the reflected ray relative to the surface?

A beam of light incident on a plane mirror is at an angle of 32° relative to the normal. What is the angle between the refelected rays and the surface of the mirror?

An electric charge q = +8.31 x 10^-7 C caused an electric field of magnitude E = 63.9 N/C at pt. P. (a) How far is the point P from the charge? (b) If the magnitude of the electric field at pt. P due to this charge is doubled, how far is the point from the charge?

What is the electric charge q when an electric field of 75.8 N/C directed toward the charge can be observed at pt. P which is at a distance of 14.7 m?

The magnitude of the self-induced electromotive force in solenoid is 0.03 V when the current is increasing at a rate of 0.064 A/s.

           a.) Find the inductance of the solenoid.

           b.) If the solenoid has 450 turns . What is the magnetic flux through each turn when the current is 0.73 A.

A person plugged in a 1350 W hair dryer and a 2600 W electric heater in the same 130 V outlet protected by a 8.5 A circuit breaker. Will the breaker trip?

A proton moving horizontally at 4.5 x 10 ⁴ m/s enters a uniform magnetic field of 0.075 T directed upward 45⁰ with the horizontal. Find the magnitude of the magnetic force acting on the proton.

A proton makes a (radius = 30.0 cm) circular orbit in a 2.5 T magnetic field. What is the velocity of the proton?

mass of proton = 1.67x10^-27 kg, e = 1.602x10^-19 C

A circular loop of wire of radius 0.25 cm is expected to an external

magnetic field that is perpendicular to the plane of the loop. For a time,

the magnetic field decreases at a rate of 0.0035 T/s. What is the

magnitude of the induced electromagnetic force in the loop?

calculate the energy stored in a magnetic field of solenoid of inductance 5 millinery when a maximum current 3 amp flows through it