TS EAMCET · Physics · Electromagnetic Waves
The amplitude of the electric field associated with a light beam of intensity \(\frac{15}{\pi} \mathrm{Wm}^{-2}\) is
- A \(120 \mathrm{NC}^{-1}\)
- B \(15 \mathrm{NC}^{-1}\)
- C \(60 \mathrm{NC}^{-1}\)
- D \(30 \mathrm{NC}^{-1}\)
Answer & Solution
Correct Answer
(C) \(60 \mathrm{NC}^{-1}\)
Step-by-step Solution
Detailed explanation
\(E_0 = \sqrt{2IZ_0}\) \(E_0 = \sqrt{2 \times \frac{15}{\pi} \times 120\pi}\) \(E_0 = \sqrt{30 \times 120}\) \(E_0 = \sqrt{3600}\) \(E_0 = 60 \mathrm{NC}^{-1}\)
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 ratio of the centripetal accelerations of the electron in two successive orbits of hydrogen is \(81: 16\). Due to a transition between these two states, the angular momentum of the electron changes by ( \(h\) - Planck's constant)TS EAMCET 2024 Medium
- The position of a particle at time \(t\) is given by the equation \(x(t)=\frac{v_0}{A}\left(1-e^{A t}\right) v_o=\) constant and \(A>0\). Dimensions of \(v_o\) and A respectively areTS EAMCET 2004 Easy
- A block is placed on a parabolic shape ramp given by equation . If the coefficient of static friction is , then what is the maximum height above the ground at which the block can be placed without slipping?TS EAMCET 2022 Medium
- A hydraulic lift as shown in the figure is used to lift a mass of \(1000 \mathrm{~kg}\), which is placed on a piston \(\left(P_1\right)\) of area \(1 \mathrm{~m}^2\). If the cross-section area of the piston \(\left(P_2\right)\) at the other end is \(0.01 \mathrm{~m}^2\), then how much mass needs to be put on it to lift the \(1000 \mathrm{~kg}\) ?
TS EAMCET 2020 Easy - An alternating current is given by The R.M.S. current in amperes is,TS EAMCET 2021 Easy
- The root mean square (rms) velocity of an ideal gas at temperature \(T\) is \(v\). If the temperature is increased to \(4 T\), the rms velocity of the gas isTS EAMCET 2018 Easy
More PYQs from TS EAMCET
- Heat loss takes place from a body maintained at a temperature of \(400^{\circ} \mathrm{C}\) to the surrounding air at \(30^{\circ} \mathrm{C}\) by convection and to the surrounding surfaces at \(30^{\circ} \mathrm{C}\) by radiation. The Newton's cooling coefficient is \(20 \mathrm{~W} / \mathrm{m}^2 \mathrm{~K}\) and the Stefan-Boltzmann constant is \(5.67 \times 10^{-8}\) \(\mathrm{W} / \mathrm{m}^2 \mathrm{~K}^4\). If the rate of heat loss by convection is equal to the rate of heat loss by radiation, the emissivity of the body surface isTS EAMCET 2018 Medium
- The position vector of a particle moving in a plane is given by \(\mathbf{r}=a \cos \omega t \hat{\mathbf{i}}+b \sin \omega t \hat{\mathbf{j}}\), where \(\hat{\mathbf{i}}\) and \(\hat{\mathbf{j}}\) are the unit vectors along the rectangular axes \(X\) and \(Y ; a, b\) and \(\omega\) are constants and \(t\) is time. The acceleration of the particle is directed along the vectorTS EAMCET 2018 Easy
- A circular freeway entrance and exit are commonly banked to control a moving car at \(14 \mathrm{~m} / \mathrm{s}\). To design similar ramp for \(28 \mathrm{~m} / \mathrm{s}\) one shouldTS EAMCET 2020 Medium
- If a body is projected with an angle \(\theta\) to the horizontal, thenTS EAMCET 2008 Easy
- A deflection magnetometer is adjusted and a magnet of magnetic moment \(M\) is placed on it in the usual manner and the observed deflection is \(\theta\). The period of oscillation of the needle before settling of the deflection is \(T\). When the magnet is removed, the period of oscillation of the needle is \(T_0\) before settling to \(0^{\circ}-0^{\circ}\). If the earth's induced magnetic field is \(B_H\), the relation between \(T\) and \(T_0\) isTS EAMCET 2013 Hard
- In a nuclear reactor, the main purpose of the moderator is toTS EAMCET 2021 Medium