CUET · PHYSICS · PYQ PAPER 2025
A tightly wound 100 turn coil of radius 5 cm is carrying a certain amount of current. The magnitude of the magnetic field at the center of the coil is \( 2\pi \times 10^{-4} \, T \). The value of current flowing through the coil is
- A \(0.05A\)
- B \(0.1A\)
- C \(2A\)
- D \(0.5A\)
Answer & Solution
Correct Answer
(D) \(0.5A\)
Step-by-step Solution
Detailed explanation
\( B = \frac{\mu_0 N I}{2R} \) \( I = \frac{2RB}{\mu_0 N} \) \( I = \frac{2 \times 0.05 \, \text{m} \times 2\pi \times 10^{-4} \, \text{T}}{4\pi \times 10^{-7} \, \text{T} \cdot \text{m/A} \times 100} = 0.5 \, \text{A} \)
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
- A given p-n junction is forward biased. Which of the following statements is correct?CUET 2025 Easy
- A voltmeter of resistance \( 600 \text{ } \Omega \) is used to measure the potential drop across \( 300 \text{ } \Omega \) resistor. The measured value of potential drop will be
CUET 2025 Hard - In a Young's double slit experiment, the two parallel slits are 1 mm apart and a screen is placed 1 m away from the slits. When the light of wavelength 600 nm is used, the fringe width isCUET 2025 Easy
- In Young's double slit experiment, two slits \( d = 0.12 \text{ mm} \) apart are illuminated by monochromatic light of wavelength \( 480 \text{ nm} \). The screen is \( 1.0 \text{ m} \) away from the slits. The distance of the second bright fringe from the central maximum will beCUET 2025 Easy
- Which of the following has the maximum penetration power ?CUET 2023 Hard
- Two slits are kept 1 mm apart and the screen is placed 1.0 m away. What is the fringe separation when blue-green light of wavelength 500 nm is used ?CUET 2023 Medium
More PYQs from CUET
- Which of the following statements are correct?
(A) Direction ratios of the line \(\frac{x-1}{2}=\frac{y+2}{3}=\frac{z-3}{4}\) are 2, 3, 4
(B) Direction ratios of the line \(\frac{x-1}{2}=\frac{2-y}{7}=\frac{2 z-1}{6}\) are 2, -7, 3
(C) Direction cosines of z axis are 0, 1, 0
(D) Direction ratios of the line joining the point (1, 2, -3) and (4, 5, 6) are 1, 1, 3
(E) Direction cosines of a line which makes equal angles with the coordinate axes are \(\frac{1}{3}, \frac{-1}{3}, \frac{1}{3}\)
Choose the correct answer from the options given below:CUET 2023 Hard - The area (in sq. units) enclosed by the curve \(y=\frac{1}{2} x|x|\) and the line \(y=x\) is :CUET 2023 Hard
- Match List-I with List-II
Choose the correct answer from the options given below :List-I List-II (A) A square matrix P is said to be non-singular if (I) \(|P|=0\) (B) A square matrix P is said to be singular if (II) \(P P^T\) is symmetric (C) If a matrix P is both symmetric and skew-symmetric, then (III) \(|P| \neq 0\) (D) If P is a square matrix, then (IV) \(P\) is a null matrix CUET 2025 Hard - The value of \(a+b+c+d\) if \(\left[\begin{array}{ll}2 a+b & a+2 b \\ 2 c+d & c+2 d\end{array}\right]=\left[\begin{array}{ll}8 & 4 \\ 3 & 3\end{array}\right]\) is :CUET 2023 Easy
- The critical angle of a medium for a specific wavelength, if the medium has relative permittivity 3 and relative permeability \( \frac{4}{3} \) for this wavelength, will be :CUET 2023 Medium
- If \(f(x)=\left\{\begin{array}{ll}a x-1 & \text { if } x \geq 1 \\ 2 x+1 & \text { if } x<1\end{array}\right.\) is continuous at x = 1, then a equalsCUET 2025 Medium