JEE Mains · Physics · STD 12 -6. Electromagnetic induction
A coil is placed in magnetic field such that plane of coil is perpendicular to the direction of magnetic field. The magnetic flux through a coil can be changed: \(A.\) By changing the magnitude of the magnetic field within the coil. \(B.\) By changing the area of coil within the magnetic field. \(C.\) By changing the angle between the direction of magnetic field and the plane of the coil. \(D.\) By reversing the magnetic field direction abruptly without changing its magnitude. Choose the most appropriate answer from the options given below
- A \(A\) and \(B\) only
- B \(A, B\) and \(C\) only
- C \(A, B\) and \(D\) only
- D \(A\) and \(C\) only
Answer & Solution
Correct Answer
(B) \(A, B\) and \(C\) only
Step-by-step Solution
Detailed explanation
\(\phi=\vec{B} \cdot \vec{A}\) \(= BA \cos \theta\) Most suitable ans is \(2\) [Otherwise \(ABCD\) ]
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
- Match the LIST-I with LIST-II
Choose the correct answer from the options given below :LIST-I LIST-II (A) Gravitational constant (I) \(\left[\mathrm{LT}^{-2}\right]\) (B) Gravitational potential energy (II) \(\left[\mathrm{L}^2 \mathrm{~T}^{-2}\right]\) (C) Gravitational potential (III) \(\left[\mathrm{ML}^2 \mathrm{~T}^{-2}\right]\) (D) Acceleration due to gravity (IV) \(\left[\mathrm{M}^{-1} \mathrm{~L}^3 \mathrm{~T}^{-2}\right]\) JEE Mains 2025 Medium - A sub-atomic particle of mass \(10^{-30} \mathrm{~kg}\) is moving with a velocity \(2.21 \times 10^6 \mathrm{~m} / \mathrm{s}\). Under the matter wave consideration, the particle will behave closely like _______. \(\left(\mathrm{h}=6.63 \times 10^{-34} \mathrm{~J} . \mathrm{s}\right)\)JEE Mains 2025 Easy
- The dimensional formula of angular impulse is _______.JEE Mains 2024 Hard
- For an ideal heat engine, the temperature of the source is \(127\,^{\circ} C\). In order to have \(60\, \%\) efficiency the temperature of the sink should be \(........\,{ }^{\circ} C\). (Round off to the Nearest Integer)JEE Mains 2021 Medium
- The energy levels of an hydrogen atom are shown below. The transition corresponding to emission of shortest wavelength is
JEE Mains 2023 Medium - An atom absorbs a photon of wavelength \(500\,nm\) and emits another photon of wavelength \(600\,nm\). The net energy absorbed by the atom in this process is \(n \times 10^{-4}\,eV\). The value of \(n\) is ............ [Assume the atom to be stationary during the absorption and emission process] \(\left(\right.\)Take \(h =6.6 \times 10^{-34}\,Js\) and \(\left.c =3 \times 10^8\,m / s \right)\)JEE Mains 2023 Medium
More PYQs from JEE Mains
- If \(A\) and \(B\) are the points of intersection of the circle \(x^2+y^2-8 x=0\) and the hyperbola \(\frac{x^2}{9}-\frac{y^2}{4}=1\) and a point P moves on the line \(2 x-3 y+4=0\), then the centroid of \(\triangle \mathrm{PAB}\) lies on the line :JEE Mains 2025 Hard
- The equivalent resistance between points \(A\) and \(B\) in the given network is ............ \(\Omega\)
JEE Mains 2022 Medium - Let a curve \(y=f(x)\) pass through the points \((0,5)\) and \(\left(\log _e 2, k\right)\). If the curve satisfies the differential equation \(2(3+y) e^{2 x} d x-\left(7+e^{2 x}\right) d y=0\), then \(k\) is equal toJEE Mains 2025 Medium
- A solid circular disc of mass \(50 \mathrm{~kg}\) rolls along a horizontal floor so that its center of mass has a speed of \(0.4 \mathrm{~m} / \mathrm{s}\). The absolute value of work done on the disc to stop it is _______ \(\mathrm{J}\).JEE Mains 2024 Hard
- Two electric dipoles \(A, B\) with respective dipole moments \(\overrightarrow {{d_A}} = - 4\,qa\,\hat i\) and \(\overrightarrow {{d_B}} = 2\,qa\,\hat i\) are placed on the \(x-\) axis with a separation \(R\), as shown in the figure. The distance from \(A\) at which both of them produce the same potential is
JEE Mains 2019 Hard - In a triangle, the sum of lengths of two sides is \(x\) and the product of the lengths of the same two sides is \(y.\) If \(x^2 - c^2 = y ,\) where \(c\) is the length of the third side of the triangle, then the circumradius of the triangle isJEE Mains 2019 Hard