Electricity and Magnetism Answers

Check the validity of the following two equations to express an

electromagnetic wave.

E = k Eosin(ky+ wt) ;B = i Bosin(ky + wt)

Find the volume charge density associated with a field given by D= (xy²)i + (yx²)j + (z) C/m²

The sound of the explosion is heard 1920 metres away 6.0 seconds after the explosion has happened.

Calculate the speed of sound in this air.

Josh stored an electric potential energy of 2.5j in a vacuum of 1.00m3 by a field E. If the field is reduced to 0.25 of its initial value, how much energy is stored per cubic meter?

if an object has a surface area of 1020 square decimeter where a magnitude of 175Nm^2/C electric flux hits it in an angle of 152 degree less of a straight angle.

A proton moves at 4.45 × 10⁷ m/s perpendicular to a magnetic field. The field causes the proton to travel in a circular path of radius of 0.09 m. What is the field strength? (m_proton = 1.6726 × 10^-27 kgs and q=1.602×10⁻¹⁹ C)

A solenoid is 0.30 m long with 103 turns per meter and carries a current of 5.0 A. what is

the magnitude of the magnetic field at the center of this solenoid?

A 9 V battery is connected in series with a 10 resistor. What is the current in the circuit, to the nearest tenth of an ampere?

A toroid of inner radius 15cm and an outer radius 18cm carries an electric current of 5A. How many times must the wire be wound about it such that the toroid will yield a magnetic field of 8x10-3 T at its center?

A car headlight filament is made of tungsten and has a cold resistance of 0.451 ohms. If the filament is cylindrical in nature and is 3.6m long. What is its cross-sectional area?