Electricity and Magnetism Answers

Two point charges are 50 m apart. Their combined value is 20 C . What are the magnitudes of the charges if one pepels other with a force of a) 75 N (b) 7.5N (c) 0.75 N

If the circuit I is in phase 0= 0, what is the name of this circuit?

Describe an electronmagnetic wave?

Two small charged spheres are 6.52cm apart. They are moved and the force each exerts on the other is found to have tripled. How far apart are they now?

Suppose that earth has a surface charge density of 1 electron/m*2.calculate earth's potential and electric field just outside earth's surface.Radius of earth 6400km.

A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength Of sound the bat makes, if bat's emit a chirp at a frequency of 6.00 × 10⁴ Hz, and if the speed of sound in air is 343m/s, what is the smallest insect a bat can detect?

Three equal positive charge of 10 statC are located at the vertices of an equilateral triangle of 2cm leg. What is the magnitude of the force acting on each charge.

How will the UK's electricity demand change in the future?

A beam consisting of a mixture of two positive ions of different masses pass rightward through a magnetic field pointing out of the plane of the page, and impinge on a screen placed to the right. The screen shows two dots placed one below the other. Which dot corresponds to the heavier ion and why?

3. The figure shows a charge +q and another charge -q fixed at points A and B separated by a distance of 10.0 cm. If q = 2 µC, calculate a. The electric potential at point P

b. The electric potential at point Q

c. The work done to bring a charge of 5 µC from P to Q.