AP EAMCET · PHYSICS · Alternating Current
The average power output of a point source of an electromagnetic radiation is \(1080 \mathrm{~W}\). The maximum value of the rms value of the electric field at a distance of \(3 \mathrm{~m}\) from the source is
- A \(20 \mathrm{Vm}^{-1}\)
- B \(40 \mathrm{Vm}^{-1}\)
- C \(60 \mathrm{Vm}^{-1}\)
- D \(90 \mathrm{Vm}^{-1}\)
Answer & Solution
Correct Answer
(C) \(60 \mathrm{Vm}^{-1}\)
Step-by-step Solution
Detailed explanation
\begin{aligned} & \text { Maximum emf, } \varepsilon_0=\sqrt{\frac{\mathrm{P}}{2 \pi \mathrm{R}^2 \mathrm{E}_0 \mathrm{c}}} \\ & =\sqrt{\frac{1080}{2 \times 3.14 \times 3^2 \times 8.85 \times 10^{-12} \times 3 \times 10^8}} \\ & =\sqrt{\frac{1080 \times 10^8}{54 \times 314…
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
- Three vectors each of magnitude \(3 \sqrt{1.5}\) units are acting at a point. If the angle between any two vectors is \(\frac{\pi}{3}\), then the magnitude of the resultant vector of the three vectors isAP EAMCET 2025 Medium
- The surface tension and vapour pressure of a liquid at \(25^{\circ} \mathrm{C}\) are \(8 \times 10^{-2} \mathrm{Nm}^{-1}\) and \(2.5 \times 10^3 \mathrm{~Pa}\) respectively. The radius of the smallest spherical water droplet which can from without evaporating at \(25^{\circ} \mathrm{C}\) isAP EAMCET 2022 Hard
- In the projectile motion of an object, the object reaches its maximum height where its speed is half of initial speed. Then the ratio between range and maximum height of projectile isAP EAMCET 2022 Easy
- The water on the surface of a lake is just about to freeze. The most likely temperature at the bottom of the lake isAP EAMCET 2021 Medium
- A rectangular slab consists of two cubes of copper and brass of equal sides having thermal conductivities in the ratio \(4: 1\). If the free face of brass is at \(0{ }^{\circ} \mathrm{C}\) and that of copper is at \(100^{\circ} \mathrm{C}\), then the temperature of their interface isAP EAMCET 2025 Hard
- The heat energy supplied to a diatomic gas at constant pressure is \(210 \mathrm{~J}\), then the work done by the gas isAP EAMCET 2023 Easy
More PYQs from AP EAMCET
- Which of the following models states that "In an atom, the positive charge is uniformly distributed and electorns are embedded into it't?AP EAMCET 2020 Easy
- Iron sulphide is heated in air to form \(A\) an oxide of sulphur. \(A\) is dissolved in water to give an acid. The basicity of this acid isAP EAMCET 2002 Easy
- Find the equation of the parabola which passes through , has its vertex at the origin and its axis along the axis.AP EAMCET 2021 Easy
- Two springs A and B fixed at the top and are stretched by \(8 \mathrm{~cm}\) and \(16 \mathrm{~cm}\) respectively, when loads of \(20 \mathrm{~N}\) and \(10 \mathrm{~N}\) are suspended at the lower ends. The ratio of the spring constants of the springs \(A\) and \(B\) isAP EAMCET 2023 Easy
- The de-Broglie wavelength of an electron moving with a velocity of \(1.5 \times 10^8 \mathrm{~m} / \mathrm{s}\) is equal to that of a photon. The ratio of kinetic energy of the electron to that of the photon \(\left(c=3 \times 10^8 \mathrm{~m} / \mathrm{s}\right)\)AP EAMCET 2012 Easy
- The triangle formed by the lines \(2 x^2+x y-6 y^2=0\) and \(x+y-1=0\) isAP EAMCET 2025 Medium