Electricity and Magnetism Answers

A square cost of resistance 4ohm ,50 turns and side length 5cm is places with it's plane making on amgle of 40° with a uniform field 2T.In 4.5 s the coil rotates until it's plane becomes parallel to the.magnetic field.Find the current induced in the coil.

A magnetic field of 3.2T is perpendicular to a square coil of 12 turns.The length of each side of the coil is 9cm.Find the magnetic flux through the coil if the magnetic field makes an angle of 30° with the normal to the plane of the coil.

True or false the number of coils and the number of batteries are factors that can affect the strength of an

Electromagnet

A copper wire is 2.50 m long and has a diameter of 2.5 mm. How much current will it draw when connected to a 3.0 V source?

1.  Three charged particles are arranged in a line as shown in figure below. Charge A = -5 μC, charge B = +10 μC and charge C = -12 μC.  

a.  Calculate the net electrostatic force on particle A due to the other two charges.

b.  Calculate the net electrostatic force on particle B due to the other two charges.

c.   Calculate the net electrostatic force on particle C due to the other two charges 

1. Compute for the amount of charge (q) of a 15 V battery with -45 J potential energy
2. A metal sphere has 5x10^-9C static charge. Compute the voltage if the radius is equal to 0.05m. (k=8.99 x 10^9 N.m^2/C^2
3. Find the Total capacitance of the three given capacitors in series connection, given their individual capacitances, 4.0 μF, 15.0 μF.
4. Find the net capacitance of the three given capacitors connected in parallel, given their individual capacitances, 2.0 μF, 5.0, μF, 8.0 μF.
5. A parallel plate capacitor was placed 0.002 m apart. Compute for the capacitance if the area each plate is equal to 0.025 m^2. (ε0 = 8.85x10^-12 F/m)

A spherical ball has a radius of 0.2 m and electric charge is 20uc in its center.Calculate the electric flux pass through the spherical ball.

A copper wire has a resistance of 15.0 at a temperature of 14 degrees * C . After a current passes through the windings, the resistance rose to 22.5 ohms. To what temperature was the wire heated?

Two small spheres spaced apart have equal charge. How many electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57 x 10^-21 N?

1. two charged spheres q1 = 2.00x10^11 C; and q2=-5.00x^-8C are held fixed at positions 0.0500m apart. Calculate the magnitude of each electrostatic force between two spheres
2. Determine the electric flux of an electric field E = 2000 N/C with an area of 10m^2 and 45 degree angle
3. compute for the amount of charge (q) that passes through a conductor in 10 seconds with the amount of current equal to 20 a.