1. . Coulomb is the unit of which quantity?
(A) Force
(B) Permittivity
(C) Charge
(D) Field strength
2. . Coulomb law is employed in
(A) Electrostatics
(B) Magnetostatics
(C) Electromagnetics
(D) Maxwell Theory
3. . Find the force between 2C and -1C separated by a distance 1m in air (in newtons).
(A) 18 × 10⁹
(B) 18 × 10⁹
(C) 18 × 10⁻⁹
(D) 18 × 10⁻⁹
4. . The Coulomb law is an implication of which law?
(A) Ampere law
(B) Gauss law
(C) Lenz law
(D) Biot Savart law
5. . Which of the following correctly states Gauss law?
(A) Electric flux is equal to charge
(B) Electric flux per unit volume is equal to charge
(C) Electric field is equal to charge density
(D) Electric flux per unit volume is equal to volume charge density
6. . The electric flux density is the
(A) Product of permittivity and electric field intensity
(B) Product of number of flux lines and permittivity
(C) Product of permeability and electric field intensity
(D) Product of number of flux line and permeability
7. . A point charge 2nC is located at origin. What is the potential at (1,0,0)?
(A) 12
(B) 14
(C) 16
(D) 18
8. . The potential difference in an open circuit is
(A) Zero
(B) Unity
(C) Infinity
(D) All of above
9. . The potential due to a dipole at a point P from it is the
(A) Sum of potentials at the charges
(B) Difference of potentials at the charges
(C) Multiplication of potentials at the charges
(D) Ratio of potentials at the charges
10. . Dipoles in any electric field undergo
(A) Magnetism
(B) Electromagnetism
(C) Magnetization
(D) Polarization
11. . Equipotential surface is a
(A) Real surface
(B) Complex surface
(C) Imaginary surface
(D) Existing surface
12. . If the electric potential is given, which of the following cannot be calculated?
(A) Electrostatic energy
(B) Electric field intensity
(C) Electric flux density
(D) Permittivity