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 118easy
Medium wave radio signals may be received at far off distance at night because
Question 119easy
A plane electromagnetic wave travelling along +z-direction, has its electric field given by Ex = 2 cos(*t) and E = 2 cos (*t + 90). The wave is
Question 120easy
For a dipole antenna
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Question 121easy
An antenna, when radiating, has a highly directional radiation pattern. When the antenna is receiving, its radiation A 41 pattern
Question 122easy
The capacitance per unit length and the characteristic impedance of a lossless transmission line are C and Zo respectively. The velocity of a travelling wave on the transmission line is
Question 123easy
If v, w, q stand for voltage, energy and charge, then v can be expressed as dqdw
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Question 124easy
The time averaged poynting vector, in W/m2, for a wave with E = 24 OW + a Vim in free space is given
Question 125easy
The polarisation of wave with electric field vector E = E0ei()t+114 (ax + ay) is
Question 126easy
The maximum usable frequency of an ionospheric layer at 60? incidence and with 8 MHz critical frequency is