Electric force

A electric force is much stronger than the gravitational forceB gravitational force is much stronger that the electric forceC electric force is shorter range than the gravitational forceD... more

In a helium atom, two electrons orbit the nucleus that consists of 2 protons and 2 neutrons. If the atomic radius of helium is 3.1x10^-11 m, what is the average kinetic energy of the electrons?... more

A charged object of mass 0.004 kg is suspended by a string in a uniform electric field of magnitude 540000 N/C. The electric field, angled 42º above the horizontal, causes the object to be in... more

A charge of -6.4 μC is fixed on the x axis at the x=-4.0 m, while a charge of +1.6 μC is fixed at the origin   Which points on the x axis at which the net electric field is zero?

An annulus is a circular disk with a hole through the center. Suppose an annulus with an outer radius of 9 cm and inner radius of 5 cm is placed horizontally and bears a uniform surface charge... more

What would the force on a proton be at (0,0)m be if 6 electrons were arranged in a regularhexagon centred on (0,0)m?   I was thinking along the lines of finding the electric field at the centre.... more

Calculate the electric force that exists between two objects that are 7.3 × 10–2 m apart and carry charges of 4.5 × 10–6 C and –7.2 × 10–6 C. Is this force attractive or repulsive?

A charge Q is placed at each of the opposite corners of a square . A charge q is placed at each of the other 2 corners . if net electrical force on Q is 0(zero) . then Q/q equals    -2... more

Four fixed charges are arranged in a rectangle each charge are in the corner of the rectangle charges are ( -16 micro c,25 micro c,-7 micro c ,+9 micro c) respectively ….find the electric force on... more