Ques.1. When the separation between two charges is made four times, the force between them
Ques.2. The force per unit length between two stationary parallel wires carrying (steady) currents _____.
A. is inversely proportional to the separation of wires
B. is proportional to the magnitude of each current
C. satisfies Newton’s third law
Ques.3. If voltage applied on a capacitor is increased from V to 2V, choose the correct conclusion.
- Q remains the same, C is doubled
- Q is doubled, C doubled
- C remains same, Q doubled
- Both Q and C remain same
Ques.4. A dielectric material is placed in vacuum in a uniform electric field of E = 4 V/m. What is the electric field inside the material if the relative permittivity of dielectric material is 2?
- 4 V/m
- 2 V/m
- 8 V/m
Ques.5. Which of the following law states that “The total flux out of a closed surface is equal to the net charge within the surface”?
- Laplace’s law
- Gaussian’s Law
- Coulomb’s law
- Gauss’s law
Ques.6. The potential inside a charged hollow sphere is __________.
- Same as that on the surface
- Less than that on the surface
- None of these
Ques.7. What is the force of attraction between two electric charges of opposite polarity having 1 Coulomb each when placed at 1 m?
Ques.8. Two long parallel conductors are placed 10mm apart from each other carrying a current of 150 Amperes. What will be force per meter length of each one?
Ques.9. Which among the following statement is correct regarding an ideal conductor in a static electric field?
- Static electric field intensity inside conductor is non zero
- Static field intensity outside conductor is zero
- Static field intensity at the surface of conductor is directly normal to the surface
- Static field intensity at the surface of the conductor is directly parallel to the surface
Ques.10. Two charges of + 4 μC and -16 μC are separated from each other by a distance of 0.6 m. At what distance should a third charge of + 6 μC be placed from + 4 μC so that no force exerts on it will be zero?
- 0.4 m
- 0.6 m
- 1.2 m
- 0.3 m