1
JEE Advanced 2020 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1
A light disc made of aluminium (a nonmagnetic material) is kept horizontally and is free to rotate
about its axis as shown in the figure. A strong magnet is held vertically at a point above the disc away
from its axis. On revolving the magnet about the axis of the disc, the disc will (figure is schematic
and not drawn to scale)
2
JEE Advanced 2017 Paper 2 Offline
MCQ (Single Correct Answer)
+3
-0.75
A symmetric star shaped conducting wire loop is carrying a steady state current $${\rm I}$$ as shown in the figure. The distance between the diametrically opposite vertices of the star is $$4a.$$ The magnitude of the magnetic field at the center of the loop is
3
JEE Advanced 2017 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-0.75
A charged particle (electron or proton) is introduced at the origin (x=0,y=0,z=0) with a given initial velocity $$\overrightarrow v .$$ A uniform electric field $$\overrightarrow E $$ and a uniform magnetic field $$\overrightarrow B $$ exist everywhere. The velocity $$\overrightarrow v ,$$ electric field $$\overrightarrow E $$ and magnetic field $$\overrightarrow B $$ are given in column $$1,2$$ and $$3,$$ respectively. The quantities $${E_0},{B_0}$$ are positive in magnitude.
Column 1 | Column 2 | Column 3 | |||
---|---|---|---|---|---|
(I) | Electron with $$\overrightarrow v = 2{{{E_0}} \over {{B_0}}}\widehat x$$ | (i) | $$\overrightarrow E = {E_0}\widehat z$$ | (P) | $$\overrightarrow B = - {B_0}\widehat x$$ |
(II) | Electron with $$\overrightarrow v = {{{E_0}} \over {{B_0}}}\widehat y$$ | (ii) | $$\overrightarrow E = - {E_0}\widehat y$$ | (Q) | $$\overrightarrow B = {B_0}\widehat x$$ |
(III) | Proton with $$\overrightarrow v = 0$$ | (iii) | $$\overrightarrow E = - {E_0}\widehat x$$ | (R) | $$\overrightarrow B = {B_0}\widehat y$$ |
(IV) | Proton with $$\overrightarrow v = 2{{{E_0}} \over {{B_0}}}\widehat x$$ | (iv) | $$\overrightarrow E = {E_0}\widehat x$$ | (S) | $$\overrightarrow B = {B_0}\widehat z$$ |
In which case will the particle move in a straight line with constant velocity?
4
JEE Advanced 2017 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-0.75
A charged particle (electron or proton) is introduced at the origin (x=0,y=0,z=0) with a given initial velocity $$\overrightarrow v .$$ A uniform electric field $$\overrightarrow E $$ and a uniform magnetic field $$\overrightarrow B $$ exist everywhere. The velocity $$\overrightarrow v ,$$ electric field $$\overrightarrow E $$ and magnetic field $$\overrightarrow B $$ are given in column $$1,2$$ and $$3,$$ respectively. The quantities $${E_0},{B_0}$$ are positive in magnitude.
Column 1 | Column 2 | Column 3 | |||
---|---|---|---|---|---|
(I) | Electron with $$\overrightarrow v = 2{{{E_0}} \over {{B_0}}}\widehat x$$ | (i) | $$\overrightarrow E = {E_0}\widehat z$$ | (P) | $$\overrightarrow B = - {B_0}\widehat x$$ |
(II) | Electron with $$\overrightarrow v = {{{E_0}} \over {{B_0}}}\widehat y$$ | (ii) | $$\overrightarrow E = - {E_0}\widehat y$$ | (Q) | $$\overrightarrow B = {B_0}\widehat x$$ |
(III) | Proton with $$\overrightarrow v = 0$$ | (iii) | $$\overrightarrow E = - {E_0}\widehat x$$ | (R) | $$\overrightarrow B = {B_0}\widehat y$$ |
(IV) | Proton with $$\overrightarrow v = 2{{{E_0}} \over {{B_0}}}\widehat x$$ | (iv) | $$\overrightarrow E = {E_0}\widehat x$$ | (S) | $$\overrightarrow B = {B_0}\widehat z$$ |
In which case will the particle describe a helical path with axis along the positive $$z$$ direction?
Questions Asked from Magnetism (MCQ (Single Correct Answer))
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