Moving Charges and Magnetism Test

Result

Moving Charges and Magnetism Test - 56

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

H⁺, He⁺ and O⁺⁺ ions having same kinetic energy pass through a region of space filled with uniform magnetic field B directed perpendicular to the velocity of ions. The masses of the ions H⁺, He⁺ and O⁺⁺ are respectively in the ratio 1 : 4 : 16. As a result

A
H⁺ ions will be deflected most

B
O⁺⁺ ions will be deflected least

C
He⁺ and O⁺⁺ ions will suffer same deflection

D
All ions will suffer the same deflection

Solution
Question 2
4 / -1

A

B

C
Rate of work done by electric field at P is zero

D
Rate of work done by both the fields at Q is zero

Solution
Question 3
4 / -1

A
E = 0, B = 0

B
E = 0, B ≠ 0

C
E ≠ 0, B = 0

D
E ≠ 0,B ≠ 0

Solution
Question 4
4 / -1

The radius of curvature of the path of a charged particle moving in static uniform magnetic field is

A
Directly proportional to the magnitude of the charge on the particle

B
Directly proportional to the magnitude of the linear momentum of the particle

C
Directly proportional to the kinetic energy of the particle

D
Inversely proportional to the magnitude of the magnetic field

Solution
Question 5
4 / -1

Two coaxial solenoids 1 and 2 of the same length are set so that one is inside the other. The number of turns per unit length are n₁ and n₂. The currents i₁ and i₂ are flowing in opposite directions. The magnetic field inside the inner coil is zero. This is possible when

A
i₁ ≠ i₂ and n₁ = n₁

B
i₁ = i₂ and n₁ ≠ n₁

C
i₁ = i₂ and n₁ = n₁

D
i₁n₁ = i₂n₂

Solution
Question 6
4 / -1

The current sensitivity of a moving coil galvanometer can be increased by

A
Increasing the magnetic field of the permanent magnet

B
Increasing the area of the deflecting coil

C
Increasing the number of turns in the coil

D
Increasing the restoring couple of the coil

Solution
Question 7
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 traveling along parallel paths

C
They will come out at the same time

D
They will come out at different times

Solution
Question 8
4 / -1

A
If θ = 0°, the charge moves in a circular path in the x–z plane

B
If θ = 0°, the charge undergoes helical motion with constant pitch along the y–axis

C
If θ = 10°, the charge undergoes helical motion with its pitch increasing with time, along the y–axis

D
If θ = 90°, the charge undergoes linear but accelerated motion along the y–axis

Solution
Question 9
4 / -1

Statement-I The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil.
Statement-II Soft iron has a high magnetic permeability and cannot be easily magnetized or demagnetized.

A
Statement I is true, statement II is true; statement II is a correct explanation for statement I

B
Statement I is true, statement II is true; statement II is not a correct explanation for statement I

C
Statement I is true, statement II is false

D
Statement I is false, statement II is true

Solution
Question 10
4 / -1

Advanced countries are making use of powerful electromagnets to move trains at very high speed. These trains are called maglev trains (abbreviated form magnetic levitation). These trains float on a guideway and do not run on steel tail tracks.
Instead of using an engine based on fossil fuels, they make use of magnetic field forces. The magnetized coils are arranged in the guideway which repel the strong magnets placed in the train\'s under carriage. This helps train move over the guideway, a technique called electrodynamic suspension. When current passes in the coils of guideway, a typical magnetic field is set up between the undercarriage of train and guideway which pushes and pulls the train along the guideway depending on the requirement.
The lack of friction and its aerodynamic style allows the train to move at very high speed
The force which makes maglev move is

A
Gravitational

B
Magnetic

C
Nuclear forces

D
Air drag