Download App

Electromagnetic Induction — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Induction1 Mark
MCQ
A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B. At the position MNQ, the speed of the ring is V and the potential difference developed across the ring is
  • A
    Zero
  • ✓
    Bv$\mathrm{R}^2 / 2$ and M is at higher potential
  • C
    πRBV and Q is at higher potential
  • D
    2RBV and Q is at higher potential
✓

Answer

Correct option: B.
Bv$\mathrm{R}^2 / 2$ and M is at higher potential
(b) Bv$\mathrm{R}^2 / 2$ and M is at higher potential

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Electromagnetic Induction→Electromagnetic Induction — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

A battery of $e.m.f.$ $10\, V$ is connected to resistance as shown in figure. The potential difference ${V_A} - {V_B}$ between the points $A$ and $B$ is .................... $V$
→
A 10 ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
→
A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringes on either side of the central bright fringe is
→
Two charged thin infinite plane sheets of uniform surface charge density $\sigma_{+}$ and $\sigma_{-}$ where $\left|\sigma_{+}\right|>\left|\sigma_{-}\right|$ intersect at right angle. Which of the following best represents the electric field lines for this system
→
20 μA current flows for 30 seconds in a wire, transfer of charge will be
→
Find out the minimum energy required to take out the only one electron from the ground state of $Li^+$?
→
Electric field in a region is uniform and is given by $\vec{E}=a \hat{i}+b \hat{j}+c \hat{k}$. Electric flux associated with a surface of area $\vec{A}=\pi R^2 \hat{i}$ is
→
Two long plane mirrors $M_1$ and $M_2$ are kept inclined to each other. The angle between reflecting surfaces is $40^o$. The maximum number of reflections , the ray will undergo is
→
According to Bohr's theory the moment of momentum of an electron revolving in second orbit of hydrogen atom will be
→
When forward bias is applied to a $P - N$ junction, then what happens to the potential barrier $V _{ B }$, and the width of charge depleted region $x$
→