Moving Charges and Magnetism Test

Result

Moving Charges and Magnetism Test - 5

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Weekly Quiz Competition

Question 1
4 / -1

An electrically charged particle enters into a uniform magnetic induction field in a direction perpendicular to the field with a velocity v. Then, it travels

A
in a straight line without acceleration

B
with force in the direction of the field

C
in a circular path with a radius directly proportional to v²

D
in a circular path with a radius directly proportional to its velocity

Solution
Question 2
4 / -1

A beam of protons is moving horizontally towards you. As it approaches you, it passes through a magnetic field which is directed upwards. As you see it, the magnetic field will deflect the beam to the

A
right

B
left

C
top

D
bottom

Solution
Question 3
4 / -1

An α-particle and a proton moving with the same kinetic energy enter a region of uniform magnetic field at right angles to the field. The ratio of the radii of the paths of a-particle to that of the proton is

A
1 : 8

B
2 : 1

C
1 : 2

D
1 : 4

Solution
Question 4
4 / -1

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?

A
They will never come out of the magnetic field region.

B
They will come out travelling along paths.

C
They will come out at the same time.

D
They will come out at different times.

Solution
Question 5
4 / -1

A particle of charge e and mass m moves with a velocity v in a magnetic field B applied perpendicular to the motion of the particle. The radius r of its path in the field is

A

B

C

D

Solution
Question 6
4 / -1

A neutron, a proton, an electron and an α - particle enter a region of uniform magnetic field with the same velocities. The magnetic field is perpendicular and directed into the plane of the paper. The tracks of the particles are labelled in the figure. The electron follows the track

A
D

B
C

C
B

D
A

Solution
Question 7
4 / -1

A charge + Q is moving upwards vertically. It enters a magnetic field directed to North. The force on the charge will be towards

A
North

B
South

C
East

D
West
Question 8
4 / -1

An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B at the centre of the circle. The radius of the circle is proportional to

A

B

C

D

Solution
Question 9
4 / -1

Two charged particles are projected into a region in which a magnetic field is perpendicular to their velocities. After they enter the magnetic field, you can conclude that

A
the charges are deflected in opposite directions

B
the charges continue to move in a straight line

C
the charges move in circular paths

D
the charges move in circular paths but in opposite directions
Question 10
4 / -1

Which of the following particles will describe the smallest circle when projected with the same velocity perpendicular to the magnetic field?

A
Electron

B
Proton

C
α - particle

D
Deuteron

Solution