IIT-JEE 2012 Paper 1 Offline

MCQ (More than One Correct Answer)

-2

Consider the motion of a positive point charge in a region, there are simultaneous uniform electric and magnetic fields $$\overrightarrow E = {E_0}\widehat j$$ and $$\overrightarrow B = {B_0}\widehat j$$. At time t = 0, this charge has velocity $$\overrightarrow v $$ in the xy-plane, making an angle $$\theta$$ with the x-axis. Which of the following option(s) is(are) correct for time t > 0 ?

If $$\theta$$ = 0$$^\circ$$, the charge moves in a circular path in the xy-plane.

If $$\theta$$ = 0$$^\circ$$, the charge undergoes helical motion with constant pitch along the y-axis.

If $$\theta$$ = 10$$^\circ$$, the charge undergoes helical motion with its pitch increasing with time, along the y-axis.

If $$\theta$$ = 90$$^\circ$$, the charge undergoes linear but accelerated motion along the y-axis.

IIT-JEE 2011 Paper 1 Offline

MCQ (More than One Correct Answer)

-2

An electron and a proton are moving on straight parallel paths with same velocity. They enter a semi-infinite region of uniform magnetic field perpendicular to the velocity. Which of the following statement(s) is/are true?

They will never come out of the magnetic field region.

They will come out travelling along parallel paths.

They will come out at the same time.

They will come out at different times.

IIT-JEE 2008 Paper 1 Offline

MCQ (More than One Correct Answer)

-2

A particle of mass m and charge q, moving with velocity v enters Region II normal to the boundary as shown in the figure. Region II has a uniform magnetic field B perpendicular to the plane of the paper. The length of the Region II is $$l$$. Choose the correct choice (s).

IIT-JEE 2008 Paper 1 Offline Physics - Magnetism Question 7 English

The particle enters Region III only if its velocity $$v > {{qlB} \over m}$$

The particle enters Region III only if its velocity $$v < {{qlB} \over m}$$

Path length of the particle in Region II is maximum when velocity $$v = {{qlB} \over m}$$

Time spent in Region II is same for any velocity v as long as the particle returns to Region I

JEE Advanced Subjects