JEE Mains · Physics · STD 12 - 8. Electromagnetic waves
A plane electromagnetic wave travels in free space along the \(x -\) direction. The electric field component of the wave at a particular point of space and time is \(E =6\; Vm^{-1}\) along \(y -\) direction. Its corresponding magnetic filed component, \(B\) would be
- A \(2 \times {10^{ - 8}}\,T\) along \(z -\) direction
- B \(6 \times {10^{ - 8}}\,T\) along \(x -\) direction
- C \(6 \times {10^{ - 8}}\,T\) along \(z -\) direction
- D \(2 \times {10^{ - 8}}\,T\) along \(y -\) direction
Answer & Solution
Correct Answer
(A) \(2 \times {10^{ - 8}}\,T\) along \(z -\) direction
Step-by-step Solution
Detailed explanation
The direction of propagation of an \(EM\) wave is direction of \(\overrightarrow{\mathrm{E}} \times \overrightarrow{\mathrm{B}}\) \(\hat{\mathrm{i}}=\hat{\mathrm{j}} \times \hat{\mathrm{B}}\) \(\Rightarrow \hat{\mathrm{B}}=\hat{\mathrm{k}}\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The frequency of oscillation of a mass \(m\) suspended by a spring is \(v_1\). If the length of the spring is cut to half, the same mass oscillates with frequency \(v_2\). The value of \(v_2/v_1\) is ________.JEE Mains 2026 Medium
- A 4 kg mass moves under the influence of a force \(\vec{F}=\left(4 t^3 \hat{i}-3 t \hat{j}\right) N\) where \(t\) is the time in second. If mass starts from origin at \(t=0\), the velocity and position after \(t=2 s\) will be :JEE Mains 2026 Medium
- The reading in the ideal voltmeter \((V)\) shown in the given circuit diagram is _______.
JEE Mains 2024 Hard - Arrange the following in the ascending order of wavelength : \((A)\) Gamma rays \(\left(\lambda_1\right)\) \((B)\) x-ray \(\left(\lambda_2\right)\) \((C)\) Infrared waves \(\left(\lambda_3\right)\) \((D)\) Microwaves \(\left(\lambda_4\right)\) Choose the most appropriate answer from the options given below :JEE Mains 2024 Hard
- Given below are two statements:
Statement I: For a mechanical system of many particles total kinetic energy is the sum of kinetic energies of all the particles.
Statement II: The total kinetic energy can be the sum of kinetic energy of the center of mass w.r.t. to the origin and the kinetic energy of all the particles w.r.t. the center of mass as the reference.
In the light of the above statements,choose the correct answer from the options given below:JEE Mains 2026 Hard - A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. If the refractive index of the material of the prism is \(\sqrt 3\) , then the angle of incidence....\(^o\)JEE Mains 2019 Medium
More PYQs from JEE Mains
- Let \({f_k}\,(x)\, = \frac{1}{k}({\sin ^k}\,x\, + \,{\cos ^k}\,x)\) for \(k=1,2,3,...\) Then for all \(x \in R,\) the value of \(f_4(x) - f_6 (x)\) is equal toJEE Mains 2019 Hard
- A galvanometer of resistance \(G\) is converted into a voltmeter of range \(0-1\, V\) by connecting a resistance \(R _{1}\) in series with it. The additional resistance that should be connected in series with \(R _{1}\) to increase the range of the voltmeter to \(0-2\, V\) will beJEE Mains 2020 Hard
- The resistance of a galvanometer is \(50\, ohm\) and the maximum current which can be passed through it is \(0.002\, A\). What resistance must be connected to it in order to convert it into an ammeter of range \(0 -0.5\, A\) ?....\(ohm\)JEE Mains 2019 Medium
- The distance of the point \((1,-5, 9)\) from the plane \(x - y + z = 5\) measured along the line \(x = y = z\) isJEE Mains 2016 Hard
- A convex lens of focal length 30 cm is placed in contact with a concave lens of focal length 20 cm. An object is placed at 20 cm to the left of this lens system. The distance of the image from the lens in cm is ________JEE Mains 2025 Easy
- A tennis ball (treated as hollow spherical shell) starting from \(O\) rolls down a hill. At point \(A\) the ball becomes air borne leaving at an angle of \(30^o\) with the horizontal. The ball strikes the ground at \(B\). What is the value of the distance \(AB\) ? (Moment of inertia of a spherical shell of mass \(m\) and radius \(R\) about its diameter .......... \(m\). \(= \frac {2}{3}\,mR^2\))
JEE Mains 2013 Hard