# Assignment1 ```Review of Syllabus: Assignment -1
Q1. What are conductors, insulators and semiconductors? Give example.
Q2. State and prove Coulomb’s law. Or prove that
𝐪𝟏 . 𝐪𝟐
𝐅=𝐤
𝐫𝟐
q1
q2
r
Q3. Derive an expression for electric field of a point (test) charge q0 separated at a distance r.
Q4. List the properties of electric lines of forces.
Q5. Write any two differences between the given figure: 1 and figure: 2
Q6. List the observations in related to the electric lines of force between two charges as shown in
figure 1 and 2.
Q7. Where are you safe during a thunderstorm?
A. In a car
or
B. Outdoors
Q8. Why can you not get radio reception in a tunnel or in a steel bridge?
Q10. Is mass of a body affected on charging?
A. Yes
B. no
Q11. If the test charge q0 moves away from the central charge Q, the electric field on a test
charge?
A. Decreases
B. Increases
Q12. Does Coulomb’s law of electric force obey Newton’s third law of motion?
A. Yes
B. No
Q13. Does motion of a body affect its charge?
A. Yes
B. No
Q14. The electric field intensity E is a vector quantity. Give your answer.
Q15. Write the SI unit of electric field intensity E.
Q16. Calculate force on an electron in a uniform electric field of 5Χ 10 4 N / C due north.
Q17. A charge of 3&micro;C is used to test the electric field of a central charge of 6C that causes a
force of 800N. What is the magnitude of the electric field?
Q18.The value of dielectric constant Ke ----------------------
```