enEnglishguગુજરાતી
GUJCET · Physics · Electromagnetic Induction
A wheel of radius 2 m having 8 conducting concentric spokes is rotating about its geometrical axis with an angular velocity of \(10 rad s ^{-1}\) in a uniform magnetic field 0 to 0.2 T . perpendicular to its plane. The value of induced emf between the rim of the wheel and centre is _________ V.
- A 4
- B 2
- C 6
- D 8
Answer & Solution
Correct Answer
(A) 4
Step-by-step Solution
Detailed explanation
A
induced \(\varepsilon=\frac{1}{2} B \omega R ^2\)
\(\begin{array}{l}\varepsilon=\frac{1}{2} \times 0.2 \times 10 \times(2)^2 \\ \varepsilon=4 V\end{array}\)
induced \(\varepsilon=\frac{1}{2} B \omega R ^2\)
\(\begin{array}{l}\varepsilon=\frac{1}{2} \times 0.2 \times 10 \times(2)^2 \\ \varepsilon=4 V\end{array}\)
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 solenoid of length 0.5 m has a radius of 1 cm and is made up of 1000 turns. It carries a current of 10 A . What is the magnitude of the magnetic field inside the solenoid ?GUJCET 2021 Easy
- When \(10 \mu C\) charge is enclosed by a closed surface, the flux passing through the surface is \(\phi\). Now another \(10 \mu C\) charge is placed inside the r closed surface, then the flux passing through the surface is _________.GUJCET 2018 Easy
- An electron and a proton of equal linear momentum enter in the direction perpendicular to uniform magnetic field. If the radii of their circular paths be \(r_e\) and \(r_p\) respectively, then
\(\frac{r_e}{r_p}\) is equal to \(\qquad\) -
(mass of electron \(=m_e\), mass of proton \(=m_p\)GUJCET 2009 Hard - What is the equivalent resistance between A and B in the given circuit ?
GUJCET 2010 Hard - A \(50 \mu \mathrm{~F}\) capacitor is connected to a \(110 \mathrm{~V}, 60 \mathrm{~Hz}\) AC supply. Determine the rms value of the current in the circuit.GUJCET 2021 Hard
- In Young's double slit experiment, the slits are separated by 0.54 mm and the screen is placed 1.8 m away. The distance between central bright fringe and sixth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in the experiment.GUJCET 2025 Hard
More PYQs from GUJCET
- If inverse matrix of \(A = \begin{bmatrix} 2 & 3 \\ 1 & -4 \end{bmatrix}\) is \(\mathrm{A}^{-1}=\left[\begin{array}{cc}a & \frac{3}{11} \\ \frac{1}{11} & b\end{array}\right]\), then \(a+b=\) ___________.GUJCET 2026 Medium
- As shown in circuit diagram, find the value of I= ________.
GUJCET 2024 Hard - For given chart, Choose correct option for 'X', 'Y' and 'Z'
X Y Z (A) Parthenogenesis Mitosis Meiosis (B) Mitosis meiosis Parthenogenesis (C) Parthenogenesis Meiosis Mitosis (D) Meiosis Mitosis Parthenogenesis GUJCET 2021 Hard - Minimize objective function \(Z=3 x+2 y\) subject to the constrains:
\(x+y \geq 8, x+y \leq 5, x \geq 0, y \geq 0\) is _________ . .GUJCET 2023 Hard - Which of the following statement is incorrect for the structure of Nucleic acids ?GUJCET 2024 Easy
- How many electrons are present in 3d orbital of tetrahedral \(K _2\left[ NiCl _4\right]\) complex.GUJCET 2009 Hard