WBJEE · Physics · Electromagnetic Induction
A metallic loop is placed in a uniform magnetic field \(\mathbf{B}\) with the planc of the loop perpendicular to \(\mathbf{B}\). Under which condition given an emf will be induced in the loop "If the loop is ....."
- A moved along the direction of \(\mathbf{B}\)
- B squeezed to a smaller area
- C rotated about its axis
- D rotated about one of its diameters
Answer & Solution
Correct Answer
(D) rotated about one of its diameters
Step-by-step Solution
Detailed explanation
According to the question. Given, A metallic loop is placed in uniform magnetic field B. Magnetic field \(\mathbf{B}\) and metallic loop are perpendicular to each other. Then, if metallic loop is moved along \(\mathbf{B}\) or rotated about its own axis. the net flux associated…
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
- The vectors are given by \(\dot{\mathbf{A}}=\hat{\mathbf{i}}+2 \hat{\mathbf{j}}+2 \hat{\mathbf{k}}\) and \(\mathbf{B}=3 \hat{\mathbf{i}}+6 \hat{\mathbf{j}}+2 \mathbf{k}\). Another vector \(\mathbf{C}\) has the same magnitude as \(\mathbf{B}\) but has the same direction as A. Then which of the following vectors represents C?WBJEE 2013 Easy
- A bullet on penetrating \(30 \mathrm{cm}\) into its target loses its velocity by \(50 \%\). What additional distance will it penetrate into the target before it comes to rest?WBJEE 2012 Medium
- If the half-life of a radioactive nucleus is 3 days, nearly what fraction of the initial number of nuclei will decay on the third day? (Given, \(\sqrt[3]{0.25} \approx 0.63)\)WBJEE 2018 Medium
- 1000 droplets of water having \(2 \mathrm{mm}\) diameter each coalesce to form a single drop. Given the surface tension of water is \(0.072 \mathrm{Nm}^{-1}\). The energy loss in the process isWBJEE 2016 Medium
- A current of 1 A is flowing along positive \(x\) -axis through a straight wire of length \(0.5 \mathrm{m}\) placed in a region of a magnetic field given by \(\mathbf{B}=(2 \mathbf{i}+4 \mathbf{j}) \mathrm{T} .\) The magnitude and the direction of the force experienced by the wire respectively areWBJEE 2013 Easy
- An electric cell of emf \(E\) is connected across a copper wire of diameter \(d\) and length \(l\). The drift velocity of electrons in the wire is \(v_{d}\). If the length of the wire is changed to \(2 l,\) the new drift velocity of electrons in the copper wire will beWBJEE 2013 Easy
More PYQs from WBJEE
- Anhydrous ferric chloride is prepared byWBJEE 2011 Easy
- Three concentric metallic shells A, B and C of radii \(a, b\) and \(c(a < b < c)\) have surface charge densities \(+\sigma,-\sigma\) and \(+\sigma\) respectively. The potential of shell B is
WBJEE 2022 Hard - Which of the following orders regarding ionization energy is correct?WBJEE 2010 Easy
-
A parallel beam of light is incident on a glass prism in the shape of a quarter cylinder of radius \(R=0.05 \mathrm{m}\) and refractive index \(n=1.5,\) placed on a horizontal table as shown in the figure. Beyond the cylinder, a patch of light is found whose the nearest distance \(x\) from the cylinder isWBJEE 2017 Medium - Which of the following statements(s) is/are true? "Internal energy of an ideal gas ..........."WBJEE 2018 Easy
- If \(\alpha, \beta\) are the roots of the quadratic equation \(x^{2}+a x+b=0,(b \neq 0),\) then the quadratic equation whose roots are \(\alpha-\frac{1}{\beta}, \beta-\frac{1}{\alpha},\) isWBJEE 2013 Medium