CUET · PHYSICS · PYQ PAPER 2023
A plane electromagnetic wave of frequency 75 Hz travels in free space along the X -direction. At a particular point in space and time \(\vec{E}=9.6 \hat{j}\). What is \(\vec{B}\) at that point ?
( \(E=\) Electric field, \(B=\) Magnetic field)
- A \(3.2 \times 10^{-8} \hat{k} T\)
- B \(3.2 \times 10^{-8} \hat{j} T\)
- C \(3.2 \times 10^{-8} \hat{i} T\)
- D \(9.6 \hat{j} T\)
Answer & Solution
Correct Answer
(A) \(3.2 \times 10^{-8} \hat{k} T\)
Step-by-step Solution
Detailed explanation
\(B = \frac{E}{c}\) \(B = \frac{9.6}{3 \times 10^8}\) \(B = 3.2 \times 10^{-8} \text{ T}\) \(\vec{E} \times \vec{B}\) points in X-direction: \(\hat{j} \times \hat{k} = \hat{i}\) \(\vec{B} = 3.2 \times 10^{-8} \hat{k} \text{ T}\)
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
- Which one among the following shows particle nature of light?CUET 2023 Medium
- The resistance of a potentiometer wire of length 4 m is \( 10 \ \Omega \).
A resistance box and a 2 V accumulator are connected in series with it.
What resistance should be introduced in the box to have a potential drop of \( 1 \ \mu\text{V/mm} \) along the potentiometer wire?CUET 2023 Medium - What should be the size of an obstacle to observe diffraction?CUET 2023 Easy
- A short bar magnet placed with its axis at 30\(^\circ\) with an external field of 800G, experiences a torque of 0.016 Nm. Work done in moving it from its most stable to most unstable position is :CUET 2023 Hard
- An ammeter of resistance \( 0.54 \text{ } \Omega \) reads current unto 1 A. The value of the shunt required to increase the range to 10 A isCUET 2025 Easy
- An infinite plane sheet of charge density \(10^{-8} \text{ C m}^{-2}\) is held in air. In this situation, the distance between two equipotential surfaces, whose potential difference is 10 V, will be (Given: Permittivity of vacuum\(\epsilon_0 \approx 8.85 \times 10^{-12} F / m\))CUET 2025 Hard
More PYQs from CUET
- Read the given paragraph and answer the given question :
Parasitism has evolved in many taxonomic groups from plants to higher vertebrates. Many parasites have evolved to be host specific in such a way that both host and the parasite tend to co-evolve. In accordance with their life styles, parasite evolve special adaptations and complex life cycle.
Which are the intermediate hosts of human liver fluke?CUET 2023 Easy - Which of the following compounds can be prepared by Sandmeyer's reaction?
(A) Chlorobenzene
(B) Bromobenzene
(C) Cyanobenzene
(D) Fluorobenzene
Choose the correct answer from the options given below:CUET 2025 Medium - Which of the following is the correct relation between electric intensity E and electric potential V :CUET 2023 Easy
- If \(x_1, x_2, x_3,\)........,\(x_n\) are \(n\) observations in a sample then which of following is/are TRUE?
(A) The mean \(\bar{x}\) has \(n\) degree of freedom
(B) The mean \(\bar{x}\) has ( \(n-1\) ) degree of freedom
(C) The standard deviation of the sample has ( \(n-1\) ) degree of freedom
(D) The standard deviation of the sample has \(n\) degree of freedom
Choose the correct answer from the options given below :CUET 2025 Medium - If we plot graph for first order reaction involving reactant R, then it will be a straight line if plotted for :CUET 2023 Easy
- The feasible region of the constraints \(x \geq 0, x+y \leq 1\) and \(x-y \leq 1\) is situated in:CUET 2023 Easy