AP EAMCET · PHYSICS · Electromagnetic Waves
The magnetic field of a plane electromagnetic wave is given by Average energy density corresponding to the electric field is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Average energy density, Uavg=B022μ0 ⇒Uavg=400×10-622×4π×10-7 ⇒Uavg=16×10-88π×10-7 ⇒Uavg=63.66×10-3 Average energy density corresponding to electric field, U=Uavg2=63.66×10-32 ⇒U=31.8×10-3 J.m-3
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
- In an oscillating \(L C\) circuit, the maximum charge on the capacitor is \(Q\). The charge on the capacitor when the energy is stored equally between the electric and magnetic fields isAP EAMCET 2019 Easy
- Two uniform stretched strings \(A\) and \(B\), made of steel, are vibrating under the same tension. If the first overtone of \(A\) is equal to the second overtone of \(B\) and if the radius of \(A\) is twice that of \(B\), the ratio of the lengths of the strings isAP EAMCET 2011 Medium
- A particle is moving along a horizontal circle of radius ' \(r\) ' under a centripetal force \(\frac{-c}{r^2}\) where ' \(c\) ' is a constant. Then, the total energy of the particle isAP EAMCET 2017 Easy
- A toy of mass \(20 \mathrm{~g}\) at rest acquires a velocity \((3 \hat{\mathrm{i}}-2 \hat{\mathrm{j}}) \mathrm{ms}^{-1}\) in 2 seconds. Then the power of the toy isAP EAMCET 2023 Medium
- A metallic disc of radius 0.3 m is rotating with a constant angular speed of \(60 \mathrm{rad} \mathrm{s}^{-1}\) in a plane perpendicular to a uniform magnetic field of \(5 \times 10^{-2} \mathrm{~T}\). The emf induced between a point on the rim and centre of the disc isAP EAMCET 2025 Medium
- The deflection produced in a tangent galvanometer, whose coil has a resistance of \(9 \Omega\) is \(30^{\circ}\). The potential difference across the coil is \(4.5 \mathrm{~V}\). If the number of turns in the coil is 10 , the radius of the coil is (Given, \(B_{\mathrm{H}}=3.14 \times 10^{-5} \mathrm{~T}\) )AP EAMCET 2020 Hard
More PYQs from AP EAMCET
- Equation of the perpendicular bisector of the line joining the points whose position vectors are \(\mathbf{a}\) and \(\mathbf{b}\) respectively isAP EAMCET 2020 Easy
- If \(\alpha\) and \(\beta\) are the roots of the equation \(a x^2+b x+c=0\), then \(\lim _{x \rightarrow \alpha} \frac{1-\cos \left(a x^2+b x+c\right)}{(x-\alpha)^2}=\)AP EAMCET 2018 Easy
- The equation of the plane passing through the point \(\hat{\mathbf{i}}+2 \hat{\mathbf{j}}-\hat{\mathbf{k}}\) and perpendicular to the line of intersection of the planes \(\mathbf{r} \cdot(3 \hat{\mathbf{i}}-\hat{\mathbf{j}}+\hat{\mathbf{k}})=1\) and \(\mathbf{r} \cdot(\hat{\mathbf{i}}+4 \hat{\mathbf{j}}-2 \hat{\mathbf{k}})=2\), isAP EAMCET 2019 Medium
- If \(\alpha \neq 0\) and the mean deviation of the observations \(\{k \alpha\}\), for \(k=1,2, \ldots \ldots, 50\) about its median is 50 , then \(|\alpha|=\)AP EAMCET 2017 Medium
- The wavelength associated with the electron moving in the first orbit of hydrogen atom with velocity \(2.2 \times 10^6 \mathrm{~ms}^{-1}\) (in nm) is
\(\left(m_e=9.0 \times 10^{-31} \mathrm{~kg}, h=6.6 \times 10^{-34} \mathrm{Js}\right)\)AP EAMCET 2022 Easy - The energy (in J) released when an excited electron of \(5^{\text {th }}\) orbit of hydrogen atom returns to its ground state isAP EAMCET 2023 Medium