Question

Find electrostatic force in the centre of clock

Answer 1

Answer:

The magnitude of force on qo due to each of the 4 charges will be equal as they all have same magnitude and all are at same distance from qo . So let this force be Fq−q0 (magnitude of force due to each charge on qo)

Now lets see directions of all 4 forces on qo(positive)

due to cahrge at

a) 9 and 3 -- towards 9 (attractive and repulsive respectively)

b) 12 and 6 -- towards 6 (repulsive and attractive respectively)

so net force - towards 9 is 2Fq−q0 and towards 6 is also 2Fq−q0

now we are left with finding resultant of these to forces only

Explanation:

The magnitude of force on qo due to each of the 4 charges will be equal as they all have same magnitude and all are at same distance from qo . So let this force be Fq−q0 (magnitude of force due to each charge on qo)

Now lets see directions of all 4 forces on qo(positive)

due to cahrge at

a) 9 and 3 -- towards 9 (attractive and repulsive respectively)

b) 12 and 6 -- towards 6 (repulsive and attractive respectively)

so net force - towards 9 is 2Fq−q0 and towards 6 is also 2Fq−q0

now we are left with finding resultant of these to forces only