Q1. Calculate the magnitude of the electrostatic force of attraction between an iron nucleus (26e)and its innermost electron if the distance between them is 1.5 x 10^-12 m

Q2. Three charges of 11 μC are place at the corners of an equilateral triangle of side length 15 cm.

Calculate the magnitude and direction of the force on each charge.

Q3. Calculate the electric field strength at the point A in the figure below

Q4. A system of two equal and opposite charges is shown below

The net flux through Gaussian surface 1 (GS1) is - Φ what is the net flux through,

(i) GS2 (iv) GS5

(ii) GS3 (v) GS6

(iii) GS4

Q5. There are six test charges shown in each figure below. On each figure draw a Gaussian surface which has the appropriate nett flux passing through it. Each surface must contain at least 3 charges.

Q6. The following diagram is to be used for Questions pattern in the vicinity of two point charges P and Q.

Q7. Which of the following describes the sign of the charges?

A. P and Q are both positive.

B. P and Q are both negative.

C. P is negative and Q is positive.

D. P is positive and Q is negative. it shows the electric lines of force