Electromagnetic Theory | True-False Questions

Q. Coulomb’s law for the force between electric charges most closely resembles with Newton’s law of gravitation.

Answer
True

Q. Dielectric constant and permittivity are same.

Answer
True

Q. Potential of every point inside a hollow charged sphere is same.

Answer
True

Q. In electrostatic field A x E = 0.

Answer
True

Q. The charge in a capacitor is stored in dielectric field.

Answer
True

Q. A capacitor is sort of open circuit to dc.

Answer
True

Q. The current through a capacitor is zero if the voltage across it is not changing with time.

Answer
True

Q. The capacitor never dissipates energy but only stores it.

Answer
True

Q. The unit of polarization is same as that of electric field density.

Answer
True

Q. Electric field line and equipotential line are never orthogonal.

Answer
False

Q. The charge on an isolated conductor resides inside the conductor.

Answer
False

Q. The operator ‘del’ (∇) is a scalar space function.

Answer
False

Q. Electrostatic field is solenoidal.

Answer
False

Q. Tangential component of the electric field on a perfect conductor will be infinite.

Answer
False

Q. In free space, if ρ = 0, the Poisson’s equation becomes Laplacian equation ∇2∇ = 0.

Answer
True

Q. Laplace’s equation is nonlinear but Poisson’s equation is linear.

Answer
False

Q. The polarity of a solenoid can be determined by Corkscrew rule.

Answer
False

Q. The Biot Savart’s law is a general modification of Ampere law.

Answer
True

Q. An electromagnetic field is said to be conservative when divergence of the field is zero.

Answer
False

Q. MMF is analogous to electromotive force.

Answer
True

Q. The reluctance of a material is defined as its ability to conduct magnetic flux.

Answer
True

Q. A minus sign is required to be placed before the right hand side of the expression for emf induced just to indicate the phenomenon explained by Lenz.

Answer
True
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