Electricity and Magnetism Answers

Solve for the magnetic flux through a loop with an area of 8.5 ✕ 10 -4 m2 found perpendicular to a magnetic field with magnitude 0.75 T.

can An object that is negatively charged could contain only electrons and no protons or neutrons

1. Two small spheres, each of mass 2.00g, are suspended by light strings 10.0 cm in length Fig. A uniform electric field is applied in the x direction. The spheres have charges equal to -5.00 * 10-8 C and +5.00 * 10-8 C. Determine the electric field that enables the spheres to be in equilibrium at an angle =10.0°.

1. At each corner of a square of side L there are point charges of magnitudes Q, 2Q, 3Q, and 4Q. Determine the magnitude and direction of the force on the charge 2Q. 

A charge q = 1μC moves with velocity v = 3.0m/s in a direction which forms an angle of 45 degrees with respect to a magnetic field B = 0.15T .

Compute the intensity and the direction of the force acting on the charge.

A 120-V house circuit has the following light bulbs turned on: 40,60 and 75 W. Find the equivalent resistance of these lights.

1. An electron is shot at 10 m/s⁶ between two parallel charged plates. If the field intensity E between the plates is 1 KN/C, where will the electron strike the upper plate? Assume vacuum conditions.
2. Figure 2 below shows a triangular array of three point charges, Q₁ = 1.0 x10^-6 c, Q₂ = -2.0 x10^-6 c and Q₃ = 3.0 x 10^-6 c. The height of the triangle is 0.300 m and the length of the base is 0.400 m. Find the electric potential V of these source at the midpoint P of the base of the triangle.

A current-carrying circular plate with A= 32.2 m2 is inclined at 34° with the Earth’s field direction. If the magnitude of the magnetic field is 48 125 nT, solve for the (a) angle between the normal to the surface and the B vector, and the (b) magnetic flux through the antenna 

2.0 Figure 2 below shows a triangular array of three point charges. Find the electric [5]

potential V of these source charges at the midpoint P of the base of the triangle.

Q2 = -2.0 x 10-6c

Q3 = +3.0 x 10-6c

Q1 = +1.0 x 10-6c

P

0.200 m 0.200 m

0.300 m

1.0 An electron is shot at 106 m/s between two parallel charged plates, as shown in [5]

figure 1, below. If the field intensity E between the plates is 1KN/C, where will the

electron strike the upper plate? Assume Vacuum conditions.

Take e = 1.6 x 10-19c, m = 9.1 x 10-31kg,

+| + + + + + + + + + + + + + + + +| + + + + + + + + + + + + +

+

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

0.5 cm

x

106 m/s