CUET · PHYSICS · PYQ PAPER 2025
What will be the emf induced in a square shaped coil of side 0.2 m having 200 turns, placed perpendicular to a magnetic field which is increasing at the rate of 0.5 T /s ?
- A 20 V
- B 2.0 V
- C 4.0 V
- D 1.6 V
Answer & Solution
Correct Answer
(C) 4.0 V
Step-by-step Solution
Detailed explanation
Area \( A = l^2 = (0.2 \text{ m})^2 = 0.04 \text{ m}^2 \) EMF induced \( \varepsilon = N \frac{d\Phi}{dt} = N A \frac{dB}{dt} \) \( \varepsilon = 200 \cdot 0.04 \text{ m}^2 \cdot 0.5 \text{ T/s} = 4.0 \text{ V} \)
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
- Ten capacitors each of \( 2 \mu \text{F} \) capacity were arranged in two rows such that first row contains 6 capacitors in series where as the rest were in second row. The equivalent capacitance of the network is :CUET 2023 Hard
- A rod AB moves with uniform velocity v in a uniform magnetic field as shown in the figure. Identify the correct statement(s) among the following:
(A) Rod becomes electrically charged.
(B) End A becomes positively charged.
(C) End B becomes positively charged.
(D) Rod becomes hot due to joule's heating.
Choose the correct answer from the options given below:CUET 2025 Hard - The wavelength of light from the spectral emission line of sodium is 662 nm.
The kinetic energy at which an electron would have the same de-Broglie wavelength would be:
(Given: \( h = 6.62 \times 10^{-34} \text{ J s}, m_e = 9 \times 10^{-31} \text{ kg} \))CUET 2023 Hard - The following table gives the lenght, diameter and appiled potential difference of four copper wires, A, B, C, D, across their ends. Arrange the wires in correct order of the increasing electric field.
Choose the correct answer from the options given below:Wire Length Diameter Potential difference (A) Wire A l 3d V (B) Wire B 2l d V (C) Wire C 3l 2d 2V (D) Wire D 3l 2d V CUET 2025 Easy - An external voltage is applied across a diode such that the n-side is positive and the p-side is negative. As a result,
(A) the barrier height decreases
(B) the barrier height increases
(C) the depletion region widens
(D) the depletion region width decreases
(E) no change in barrier height
Choose the correct answer from the options given below:CUET 2025 Easy - A magnet suspended freely at the Equator will set itself _______ to the surface of Earth, while one suspended at pole will stand ________.CUET 2023 Medium
More PYQs from CUET
- In the following examples, select the primary alkyl halide
(A). 1-Bromo-3-methylbutane
(B). 2-Bromo-2-methylbutane
(C). 3-Bromo propene
(D). Chlorophenyl methane
Choose the correct answer from the options given below:CUET 2025 Easy - Which of the following reactions has a positive \(\Delta S^{\circ}\) value?CUET 2023 Hard
- A vector of magnitude 9, which is perpendicular to both the vectors \((4 \hat{i}-\hat{j}+8 \hat{k})\) and \((-\hat{j}+\hat{k})\) isCUET 2025 Easy
- If limiting molar conductance of \(NaCl , K _3 PO _4\) and KCl are \(110.2,98.8\) and \(134.6 \Omega^{-1} cm^2 mol^{-1}\) respectively, the limiting molar conductance of \(Na _3 PO _4\) will be: \(\left(\Omega^{-1} cm^2 mol^{-1}\right)\)CUET 2023 Medium
- About linear programming problem (LPP), which of the following statements are correct ?
(A) In a LPP, the linear inequalities or restrictions on the variables are called linear constraints.
(B) If the feasible region for an LPP is unbounded, then the maximum or minimum value of the objective function \(Z=a x+b y\) never exists.
(C) The feasible region for an LPP is always conver.
(D) The common region determined by all the linear constraints of an LPP is called the feasible region.CUET 2025 Hard - The general solution of \(\frac{d y}{d x}=1+x^2+y^2+x^2 y^2\) is:
(given that \(C\) is the constant of integration)CUET 2023 Hard