JEE Mains · Physics · STD 12 -6. Electromagnetic induction
The source of time varying magnetic field may be \((A)\) a permanent magnet \((B)\) an electric field changing linearly with time \((C)\) direct current \((D)\) a decelerating charge particle \((E)\) an antenna fed with a digital signal Choose the correct answer from the options given below:
- A \((D)\) only
- B \((C)\) and \((E)\) only
- C \((A)\) only
- D \((B)\) and \((D)\) only
Answer & Solution
Correct Answer
(A) \((D)\) only
Step-by-step Solution
Detailed explanation
Source of time varying magnetic field may be \(\rightarrow\) accelerated or retarded charge which produces varying electric and magnetic fields. \(\rightarrow\) An electric field varying linearly with time will not produce variable magnetic field as current will be constant
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 tub is filled with water and a wooden cube \(10\) cm \(\times\) \(10\) cm \(\times\) \(10\) cm is placed in the water. The wooden cube is found to float on the water with a part of it submerged in water. When a metal coin is placed on the wooden cube, the submerged part is increased by \(3.87\) cm. The mass of the metal coin is _______ gram.
(Take water density as \(1\) g/cm\(^3\) and density of wood as \(0.4\) g/cm\(^3\))JEE Mains 2026 Medium - Two identical particles of mass \(1\, {kg}\) each go round a circle of radius \({R}\), under the action of their mutual gravitational attraction. The angular speed of each particle is :JEE Mains 2021 Medium
- When two soap bubbles of radii \(a\) and \(b ( b > a )\) coalesce, the radius of curvature of common surface isJEE Mains 2021 Hard
- In the following circuit, the magnitude of current \(I _{ l }\), is \(............A\).
JEE Mains 2023 Hard - For designing a voltmeter of range \(50\,V\) and an ammeter of range \(10\,mA\) using a galvanometer which has a coil of resistance \(54\,\Omega\) showing a full scale deflection for \(1\,mA\) as in figure. \((A)\) for voltmeter \(R \approx 50\,k\Omega\) \((B)\) for ammeter \(r \approx 0.2\,\Omega\) \((C)\) for ammeter \(r \approx 6\,\Omega\) \((D)\) for voltmeter \(R \approx 5\,k \Omega\) \((E)\) for voltmeter \(R \approx 500 \Omega\) Choose the correct answer from the options given below
JEE Mains 2023 Medium - A particle is placed at the point \(\mathrm{A}\) of a frictionless track \(A B C\) as shown in figure. It is gently pushed toward right. The speed of the particle when it reaches the point \(B\) is _______. \(\left(\right.\) Take \(g=10 \mathrm{~m} / \mathrm{s}^2\) ).
JEE Mains 2024 Hard
More PYQs from JEE Mains
- Let \(\vec u\;\)be a vector coplanar with the vector \(\vec a = 2\hat i + 3\hat j - \hat k\) and \(\vec b = \hat j + \hat k\) . If \(\vec u\) is perpendicular to \(\vec a\) and \(\vec u \cdot \vec b = 24\) ,then \({\left| {\vec u} \right|^2} = \) . . . .JEE Mains 2018 Hard
- Let \(\alpha \beta \neq 0\) and \(A=\left[\begin{array}{ccc}\beta & \alpha & 3 \\ \alpha & \alpha & \beta \\ -\beta & \alpha & 2 \alpha\end{array}\right]\). If \(B=\left[\begin{array}{ccc}3 \alpha & -9 & 3 \alpha \\ -\alpha & 7 & -2 \alpha \\ -2 \alpha & 5 & -2 \beta\end{array}\right]\) is the matrix of cofactors of the elements of \(A\), then \(\operatorname{det}(A B)\) is equal to.JEE Mains 2024 Hard
- Let the foci of a hyperbola \(\mathrm{H}\) coincide with the foci of the ellipse \(E: \frac{(x-1)^2}{100}+\frac{(y-1)^2}{75}=1\) and the eccentricity of the hyperbola \(\mathrm{H}\) be the reciprocal of the eccentricity of the ellipse \(E\). If the length of the transverse axis of \(\mathrm{H}\) is \(\alpha\) and the length of its conjugate axis is \(\beta\), then \(3 \alpha^2+2 \beta^2\) is equal to :JEE Mains 2024 Hard
- If \(m\) is chosen in the quadratic equation \(\left( {{m^2} + 1} \right)\,{x^2} - 3x + {\left( {{m^2} + 1} \right)^2} = 0\) such that the sum of its roots is greatest, then the absolute difference of the cubes of its roots isJEE Mains 2019 Hard
- The sum of the infinite series \(1+\frac{2}{3}+\frac{7}{3^{2}}+\frac{12}{3^{3}}+\frac{17}{3^{4}}+\frac{22}{3^{5}}+\ldots\) is equal toJEE Mains 2021 Hard
- Let \(\mathrm{f}: \mathbb{R} \rightarrow \mathbb{R}\) be a thrice differentiable function such that \(f(0)=0, f(1)=1, f(2)=-1, f(3)=2\) and \(f(4)=-2\). Then, the minimum number of zeros of \(\left(3 f^{\prime} f^{\prime \prime}+f f^{\prime \prime \prime}\right)(x)\) is ...........JEE Mains 2024 Hard