Electricity and Magnetism Answers

A small charge q = 6.0 C is found in a uniform electric field E = 2.6 N/C. Determine the force on the charge

Find the pull on the plunger of an electromagnet when the total flux uniformly distributed is 0.8 mWb. The diameter of the plunger is 5 cm.

A power transformer has a core material with hysteresis coefficient of 120 J/m3. Its volume is 8000 cm3 and the maximum flux density is 1.1 T. Find the hysteresis loss if the frequency of the supply is 50 Hz.

A magnetomotive force is supplied by a current of 1 A through 100 turns. The magnetic circuit consists of a steel core of 1000 permeability, 10 cm long and 4 cm2 area and an air gap 1 cm long. Find the field intensity at the air gap in Oersted

A solenoid has a magnetic reluctance of 0.0022. It has 300 turns. If the current flowing is 0.5 A, find the total flux in max wells.

The primary coil of a transformer contains 24 turns of wire. The secondary coil of the transformer contains 1200 turns of wire. 

The primary coil is connected to an alternating potential difference of 6.0 V. Calculate the potential difference across the secondary coil. 

a 7.0 mm diameter copper wire carries a current of 0.7ua.what is the current density?

Two Zuc point changes are located on the x-axy. One is at x= Im and the other is at n=-1m.

(a). Determine the electric field on the y-axis at

y=0.5m

the search coil has 200 turns and a cross sectional area of 3.5 x 10^-5 m². the search coil is placed at x = 0.070 m. show that the magnetic flux linkage through the search coil is about 5x 10^-4Wb

Radio waves and gamma rays are parts of the electro magnetic spectrum. Which of the following is true about the energy carried by this waves

A. All electro magnetic waves carry the same energy

B. Radio waves carry the lowest energy since they have the lower frequency

C. Gamma rays carry the lowest energy since they have the lowest frequency

D. Radio waves carry the highest energy since they have the highest energy