CAIE A-Level Physics A2 18.5.1 Electric Potential At a Point As the Work Done Per Unit Positive Charge in Topic Practice

work done per unit charge
work (done) moving positive charge from infinity (to the point)
Any three points from:

Up to 2 points from:

- radius of sphere X is 0.30 m

- radius of sphere Y is 0.10 m

- radius of X is treble the radius of Y

Up to 2 points from:

- charge on X is positive

- charge on Y is positive

- spheres X and Y carry charges of the same sign

Up to 1 point from:

- (magnitudes of) charges on the spheres are equal

- charges on the spheres have the same magnitude