Question

True or false: When a water droplet is negatively charged, in order to suspend it in air against its gravity, we should apply an E field in the upward direction.

True or false: In order to find the E field due to MULTIPLE POINT charges, we can first find the E field at that location due to each charge separately and then add their magnitude directly to find the total E field .

True or false: In order to find the E field due to MULTIPLE POINT charges, we can first find the E field at that location due to each charge separately and we must add them as Vectors to find the total E field.

How is Gravity field defined? (How is the g field related to the gravity force and test mass m?)

How is Electric field defined? (How is the E field related to the electric force on the test charge?)

Is the electric field is always in the same direction as the electric force?.

Answer 1

(1)

When a water droplet is negatively charged, in order to suspend it in air against its gravity, we should apply an E field in the

upward direction - FALSE

we should apply E in downward direction. so, it creates a electric force upwards and balance the gravity.

(2)

In order to find the E field due to multiple point charges, we can first find the E field at that location due to each charge

separately and then add their magnitude directly to find the total E field - FALSE

(3)

In order to find the E field due to multiple point charges, we can first find the E field at that location due to each charge

separately and we must add them as Vectors to find the total E field - TRUE

(4)

gravity force = gravity field * test mass

(5)

electric force = test charge * electric field

(6)

Is the electric field is always in the same direction as the electric force-

No, force is in opposite direction for negative charge.