CBSE Class 12 Electromagnetic Waves — practice questions
24 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 Electromagnetic Waves in the app →In an EM wave travelling along the $+z$ direction with $\vec{E}$ along $+x$, the magnetic field $\vec{B}$ is aThe speed of an EM wave in vacuum equals:An FM radio broadcasts at $92.7$ MHz. The wavelength of the carrier in air is approximately:Which of the following EM waves has the shortest wavelength?Whose set of equations predicted electromagnetic waves?The extra term Maxwell added to Ampere's law is the:Electromagnetic waves are produced by charges that are:Who first demonstrated electromagnetic waves experimentally?Infrared waves are also referred to as:Radar systems used in aircraft navigation use:Most ultraviolet radiation from the Sun is absorbed in the:In an electromagnetic wave, E and B are:Electromagnetic waves travel at which speed in free space?Maxwell's calculation showed that light is:Radio waves are produced by accelerated charges in:Which radiation is trapped by carbon dioxide and water vapour?Household TV remote switches work using:X-rays are produced by bombarding a metal target with:The generalised form of Ampere's law is known as the:The total current in the Ampere Maxwell law is conduction current plus:Gamma rays are produced in which kind of process?X-rays are emitted from atoms that are:Compared with visible light, infrared waves have frequencies that are:Which band is used as a diagnostic tool in medicine?