What is the correct integral for the electric potential V at x­0 on the positive x-axis due to a uniform linear charge density λ{“version”:”1.1″,”math”:”λ”} on the y-axis between y = 0 and y = L?

The diagram shows a point charge q to the right of a charged conducting sphere with net charge Q.  Where is the magnitude of E larger, point A or point B?

The diagram shows a point charge q to the right of a charged conducting sphere with net charge Q. What is the sign of the total charge Q+q ? 

A-50 μC{“version”:”1.1″,”math”:”-50 μC”} charge is at (0, -2m). and an 80 μC{“version”:”1.1″,”math”:”80 μC”} charge is at (3m, 0). What is the magnitude of the electric field at the origin?

In a uniform electric field of a,b,0{“version”:”1.1″,”math”:”a,b,0″}, what is the flux through an L by L square surface, (a) if it sits in the xy-plane and (b) if it sits in the yz-plane? 

What is the correct integral for the electric potential V at x­0 on the positive x-axis due to a uniform linear charge density λ{“version”:”1.1″,”math”:”λ”} on the y-axis between y = 0 and y = L?

A uniform ring of charge sits in the yz-plane with it center on the origin. The ring has a 16 cm radius and an 80 μC{“version”:”1.1″,”math”:”80 μC”} charge. What is the force on a -30 μC{“version”:”1.1″,”math”:”-30 μC”} point charge at (25 cm, 0, 0) due to the ring?

Two identical particles have the same mass m and charge q and are initially separated by a distance a. If they are both released from rest, what is their speed when a long distance apart? Both particles will have the same speed.

The diagram shows a point charge q to the right of a charged conducting sphere with net charge Q.  Which is at higher potential, point A or point B?

A uniform ring of charge sits in the yz-plane with it center on the origin. The ring has a 16 cm radius and an 80 μC{“version”:”1.1″,”math”:”80 μC”} charge. What is the force on a -30 μC{“version”:”1.1″,”math”:”-30 μC”} point charge at (25 cm, 0, 0) due to the ring?