Electricity and Magnetism Answers

Two parallel wires are separated by a distance of 0.05 m. Wire 1 carries a

carries current of 12.0 A. Wire 2 carries a current of 6.0 A flowing in the

opposite direction as shown in the illustration.

Find the

(a) magnitude and

direction of the magnetic field created by wire 1 at wire 2,

(b) force exerted

by wire 1 on the 2.0 m long section of wire 2, and

(c) force exerted by wire 2

on wire 1.

4.) Two parallel wires are separated by a distance of 0.05 m. Wire 1 carries a carries current of 12.0 A. Wire 2 carries a current of 6.0 A flowing in the opposite direction as shown in the illustration. Find the (a) magnitude and direction of the magnetic field created by wire 1 at wire 2, (b) force exerted by wire 1 on the 2.0 m long section of wire 2, and (c) force exerted by wire 2 on wire 1.

5.) What should be the length of an ideal solenoid consisting of 1250 turns for the magnetic field in its interior to be 0.025 T? A current of 2.0 A is flowing through the solenoid.

1.) A proton moves through a uniform magnetic field of magnitude 2.0 µT=2.0 x 10^6 T at a speed of 5.00 x 10^6 m/s. (a) What is the magnitude of maximum magnetic force it can experience?

(b) If the proton is replaced by an electron, will it experience the same maximum force?

2.) A 55.0 m wire carries a current of 2.25 A in a location where Earth's magnetic field is 4.5 x 10^3 T. The wire experiences a force of 0.15 N. Find the angle between the wire and the magnetic field.

3.) A long straight wire carries a current of 1.0 A.

(a) At what distance from the wire is the magnitude of the magnetic field equal to 2.5 x 10^-5 T?

(b) What is the magnitude of the magnetic force that this wire will exert on a 3.0 nC particle moving at 4.2 x 10^4 m/s perpendicular to the field at that distance?

Radiation with a frequency of 7.52 × 1014 Hz illuminates a photoelectric surface in a photoelectric cell. If the work function of this surface is 2.20 eV, what is the maximum kinetic energy of the emitted electrons, and what stopping voltage would be required to reduce the current through this cell to zero?

Two-point charges, q1, which has a charge of -76.11 uC and q2, which has a charge of 13.33 uC, are separated by a distance of 24.67 cm. Identify the field's magnitude at point A between the two charges if A is 10.39 cm away from the negative charge.

Two charges are on the x-axis. Charge q 1= +35 nC is at x = 3.00 cm while charge q 2= -65nC is at x = 6.00 cm. Find the magnitude and direction of

a) the electric force that q 1 exerts on q2 ; and

b) the electric force the q 2 exerts on q1 .

2. A positive charge of 10 -8 coulombs (C) experiences a force of 0.95 N when located at a certain point in an electric field. Find the intensity (magnitude) of the electric field at that point.

protons in uniform magnetic field of .3T follow a circular trajectory with 20cm radius. Determine the speed of the protons. (q=1.6×10 -¹⁹ C and m=1.673×10 -²⁷ kg)

protons in uniform magnetic field of .3T follow a circular trajectory with 20cm radius. Determine the speed of the protons. (q=1.6×10 -¹⁹ C and

m=1.673×10 -²⁷ kg)

A closely wound 0.20m x 0.20m square coil of 100 turns is exposed to an external magnetic field of 0.74T that is perpendicular to the plane of the coil. The coil is then rotated for 10s until it makes 60 ̊ with the magnetic field. Find the average induced electromotive force during the 10s interval.

Two particles A and B are released from rest, having equal charges of -8x10^-6 C and initially separated from each other by 0.025 m. The masses of particle A and B are 6.25x10^-6 kg and 3.75x10^-6 kg respectively. Find the magnitude and initial accelerations of particle A and B.