Moving Charges and Magnetism Test

Result

Moving Charges and Magnetism Test - 38

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Weekly Quiz Competition

Question 1
4 / -1

An electron is moving along positive x–axis. To get it moving on an anticlockwise circular path in x–y plane, a magnetic field is applied

A
Along positive y–axis

B
Along positive z–axis

C
Along negative y–axis

D
Along negative z–axis

Solution
Question 2
4 / -1

A moving charge will gain energy due to the application of

A
Electric field

B
Magnetic field

C
Both of these

D
None of these
Question 3
4 / -1

A proton, a deutron and an α–particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. If r_p, r_d and r_α denote respectively the radii of the trajectories of these particles, then

A
r_α = r_pd

B
r_α>r_d>r_p

C
r_α = r_d>r_p

D
r_p = r_d = r_α

Solution
Question 4
4 / -1

When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then their

A
Energy decreases

B
Energy increases

C
Momentum increases

D
Momentum and energy remain unchanged
Question 5
4 / -1

A charge moves in a circle perpendicular to a magnetic field. The time period of revolution is independent of

A
Magnetic field

B
Charge

C
Mass of the particle

D
Velocity of the particle

Solution
Question 6
4 / -1

A proton of energy 200 MeV enters the magnetic field of 5 T. If direction of field is from south to north and motion is upward, the force acting on it will be

A
Zero

B
1.6 × 10^–10 N

C
3.2 × 10^–8 N

D
1.6 × 10^–6 N

Solution
Question 7
4 / -1

An electron enters a region where magnetic (B) and electric (E) fields are mutually perpendicular to one another, then

A
It will always move in the direction of B

B
It will always move in the direction of E

C
It always possess circular motion

D
It can go undeflected also
Question 8
4 / -1

A charge moving with velocity v in X-direction is subjected to a field of magnetic induction in the negative X-direction. As a result, the charge will

A
Remain unaffected

B
Start moving in a circular path in Y-Z plane

C
Retard along X-axis

D
Move along a helical path around X-axis

Solution
Question 9
4 / -1

A positively charged particle moving due east enters a region a uniform magnetic field directed vertically upwards. The particle will

A
Get deflected vertically upwards

B
Move in a circular orbit with its speed increased

C
Move in a circular orbit with its speed unchanged

D
Continue to move due east
Question 10
4 / -1

A particle moving in a magnetic field increases its velocity, then its radius of the circle

A
Decreases

B
Increases

C
Remains the same

D
Becomes half

Solution