Electricity and Magnetism Answers

Can a magnet with one pole be created?

What is difference between emf(electro motive force) and potential difference?

Find the potential at r1 = 40cm and r2 = 10cm from a charge Q = 2 X 10-4 µC and also the potential difference between these two points.

find the potential at r1=40cm and r2=10cm from a charge Q=2 x 10^-4 and also the potential difference between these two points.

A positive charge, q1, of 5 µC is 3 × 10–2 m west of a positive charge, q2, of 2 µC. What is the magnitude and direction of the electrical force, Fe, applied by q1 on q2?

Bob puts an iron toy car on an iron sheet. He then raises a bar magnet until it almost touches the iron sheet below the toy car. He then moves the magnet horizontally across the sheet. What will happen to the toy car?

Pls note this question includes a diagram that is not drawn to scale and no measurements of the toy car, iron sheet or the strength of the magnet are given.

Thank you.

electric dipole has opposite charge q 20 c distance 2.5 cm what is the magnitude of the electric field produced by point at distance 4cm

A series circuit consisting of an uncharged 42uF capacitor and 10M ohms resistor is connected to 100V power source. What are the current in the circuit and the charge on the capacitor after one time constant?

a magnet is parallel to a uniform magnetic field.if it is rotated by 60 degrees,the work done is 0.8 J. how much additional work is done in moving it further through 30 degrees from that position?