AP EAMCET · PHYSICS · Electromagnetic Waves
The ratio of the magnitudes of the electric field and \(10^8\) times the magnetic field of a plane electromagnetic wave is
- A \(1: 3\)
- B \(3: 1\)
- C \(1: 1\)
- D \(1: \sqrt{3}\)
Answer & Solution
Correct Answer
(B) \(3: 1\)
Step-by-step Solution
Detailed explanation
\(E = cB\) Ratio \( = \frac{E}{10^8 B} = \frac{cB}{10^8 B} = \frac{c}{10^8}\) Ratio \( = \frac{3 \times 10^8 \text{ m/s}}{10^8} = 3\) Ratio \( = 3:1\)
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 electric field associated with a mono chromatic light wave is given by \(E=E_0 \sin \left[\left(1.57 \times 10^7 \mathrm{~m}^{-1}\right](x-c t)\right]\) then the stopping potential when this light is used in a photoelectric experiment with the metal having work function \(1.9 \mathrm{eV}\) is.
[Planck's constant, \(h=6.64 \times 10^{-34} \mathrm{~J}-\mathrm{s}\) ]AP EAMCET 2022 Medium - The SI unit of length is 'metre'. Suppose we adopt a new unit of length which equals \(x\) metre. Then, the area of \(1 \mathrm{~m}^2\) expressed in terms of new unit has a magnitudeAP EAMCET 2020 Easy
- A metallic wire loop of side \((l) 0.1 \mathrm{~m}\) and resistance of \(1 \Omega\) is moved with a constant velocity in a uniform magnetic field of \(2 \mathrm{Wm}^{-2}\) as shown in the figure. The magnetic field is perpendicular to the plane of the loop. The loop is connected to a network of resistors. The velocity of loop so as to have a steady current of 1 mA in loop is
AP EAMCET 2024 Easy - In a transistor if \(\frac{I_C}{I_E}=\alpha\) and \(\frac{I_C}{I_B}=\beta\). If \(\alpha\) varies between \(\frac{20}{21}\) and \(\frac{100}{101}\), then the value of \(\beta\) lies betweenAP EAMCET 2012 Easy
- If the earth stops rotating in its orbit about the sun, there will be variation in the weight of our bodies atAP EAMCET 2021 Easy
- Which of the following is the fundamental force in nature?AP EAMCET 2022 Easy
More PYQs from AP EAMCET
- A monochromatic light of wavelength \(6000 Å\) coming from a star is detected in a 100 inch telescope. The limit of resolution of the telescope is approximatelyAP EAMCET 2022 Easy
- A long curved conductor carries a current I (I is a vector). A small current element of length \(\mathbf{d} l\), on the wire induces a magnetic field at a point, away from the current element. If the position vector between the current element and the point is \(\mathbf{r}\), making an angle with current element then, the induced magnetic field density; \(\mathbf{d B}\) (vector) at the point is ( \(\mu_0=\) permeability of free space)AP EAMCET 2012 Easy
- For two given vectors \(\bar{a}\) and \(\bar{b}\) if the vectors \(\overline{\mathrm{A}}, \overline{\mathrm{B}}\) are such that \(\overline{\mathrm{A}}+\overline{\mathrm{B}}=\bar{a}, \overline{\mathrm{A}} \times \overline{\mathrm{B}}=\bar{b}\) and \(\overline{\mathrm{A}} \cdot \bar{a}=1\), then \(\overline{\mathrm{A}}=\)AP EAMCET 2017 Medium
- What is the reduction electrode potential (in volts) of copper electrode when \(\left[\mathrm{Cu}^{2+}\right]=0.01 \mathrm{M}\) is in a solution at \(25^{\circ} \mathrm{C}\) ?
\(\left(E^{\circ}\right.\) of \(\mathrm{Cu}^{2+} / \mathrm{Cu}\) electrode is \(\left.+0.34 \mathrm{~V}\right)\)AP EAMCET 2002 Easy - For \(|x| < \frac{1}{5}\), the coefficient of \(x^3\) in the expansion of \(\frac{1}{(1-5 x)(1-4 x)}\) isAP EAMCET 2010 Medium
- Which one of the following is an anionic detergent?AP EAMCET 2017 Easy