Electromagnetism MCQs
Practice free Electromagnetism multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 221 questions — no login required.
Question 127easy
The velocity of a travelling electromagnetic wave in free spece is given by 2.4a z
Question 128easy
Consider the following statements regarding Maxwell's equations in differential form (symbols have the usual meanings)1. For free space V x H = (a+ jw E 2. For free space V . D = p 3. For steady current VxH=J 4. For static electric field V D = p Of these statements :
Question 129easy
The expression for B, given that in free Space E = 15 cos (67t x 108 t - 2itz) ix V/m is
Advertisement
Question 130easy
An air filled rectangular waveguide has dimensions 6cm x 4cm. The cut off frequency for TEio is
Question 131easy
Sparking occurs when a load is switched off because the circuit has high
Question 132easy
According to Lenz's law, the direction of induced emf and hence current
Advertisement
Question 133easy
When electromagnetic waves are reflected at an angle from a wall, their wavelength along the wall is
Question 134easy
Transmission of power to a load over a transmission line achieves optimum value when standing-wave ratio (SWR) becomes
Question 135easy
The relationship between SWR and of a transmission line isKr + 1