Electromagnetism Electromagnetism Maxwell’s equations., Electromagnetic waves, Poynting vector, induced emf, Gauss’s Law for electric fields, magnetic field amplitude 1 / 10 The displacement current in Maxwell’s equations is associated with: Moving charges in conductors Changing electric fields Static electric fields Magnetic monopoles 2 / 10 Which of the following is not a property of electromagnetic waves? They are transverse in nature. The electric and magnetic fields are perpendicular to each other. They require a medium to propagate. They travel at the speed of light in a vacuum. 3 / 10 The Poynting vector represents: Magnetic flux Direction of electromagnetic wave propagation and energy flow Electric field intensity Charge density 4 / 10 What is the relationship between the electric field (E) and magnetic field (B) in an electromagnetic wave in free space? E = cB B = cE E = B E = √cB 5 / 10 The phenomenon of electromagnetic induction forms the basis of: Electric capacitors Transformers and generators Electromagnetic waves Superconductivity 6 / 10 A circular loop of radius (0.1 , ext{m}) is placed in a uniform magnetic field of (0.5 , ext{T}). If the field changes at a rate of (2 , ext{T/s}), what is the induced emf in the loop? 0.0157 V 0.0314 V 0.0628 V 0.1256 V 7 / 10 A solenoid with 500 turns and a length of (0.25 , ext{m}) carries a current of (4 , ext{A}). What is the magnetic field inside the solenoid? 1.3 T 0.01 T 0.008 T 0.0025 T 8 / 10 Which Maxwell equation corresponds to the statement: ‘The net electric flux through a closed surface is proportional to the enclosed charge’? Gauss’s Law for electric fields Gauss’s Law for magnetism Faraday’s Law of induction Ampere-Maxwell Law 9 / 10 If the frequency of an electromagnetic wave is doubled, what happens to its wavelength in a vacuum? Doubles Halves Remains the same Becomes one-fourth 10 / 10 An electromagnetic wave has an electric field amplitude of (300 , ext{V/m}) in free space. What is the magnetic field amplitude? 1.0 × 10^-6 T 1.0 × 10^-3 T 3.0 × 10^-6 T 3.0 × 10^-3 T Your score is By WordPress Quiz plugin
