Moving Charges and Magnetism Test

Result

Moving Charges and Magnetism Test - 40

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Weekly Quiz Competition

Question 1
4 / -1

Two particles A and B of masses m_A and m_Brespectively and having the same charge are moving in a plane. A uniform magnetic field exists perpendicular to this plane. The speeds of the particles are v_A and v_Brespectively, and the trajectories are as shown in the figure. Then

A
m_Av_A< m_Bv_A

B
m_Av_A> m_Bv_B

C
m_A< m_B and v_A< v_B

D
m_A = m_B and v_A = v_B

Solution
Question 2
4 / -1

A
1

B
1/2

C
2

D
1/4

Solution
Question 3
4 / -1

A particle of mass 0.6 g and having charge of 25 nC is moving horizontally with a uniform velocity 1.2 × 10⁴ ms^–1 in a uniform magnetic field, then the value of the magnetic induction is (g = 10 ms^–2)

A
Zero

B
10 T

C
20 T

D
200 T

Solution
Question 4
4 / -1

Motion of a moving electron is not affected by

A
An electric field applied in the direction of motion

B
Magnetic field applied in the direction of motion

C
Electric field applied perpendicular to the direction of motion

D
Magnetic field applied perpendicular to the direction of motion
Question 5
4 / -1

At a specific instant emission of radioactive compound is deflected in a magnetic field. The compound can emit
(i) Electrons
(ii) Protons
(iii) He⁺²
(iv) Neutrons
The emission at the instant can be

A
i, ii, iii

B
i, ii, iii, iv

C
iv

D
ii, iii
Question 6
4 / -1

Which particles will have minimum frequency of revolution when projected with the same velocity perpendicular to a magnetic field

A
Li⁺

B
Electron

C
Proton

D
He⁺

Solution
Question 7
4 / -1

Mixed He⁺ and O²⁺ ions (mass of He⁺= 4 amu and that of O²⁺= 16 amu) beam passes a region of constant perpendicular magnetic field. If kinetic energy of all the ions is same then

A
He⁺ ions will be deflected more than those of O²⁺

B
He⁺ ions will be deflected less than those of O²⁺

C
All the ions will be deflected equally

D
No ions will be deflected

Solution
Question 8
4 / -1

A

B

C
Zero

D

Solution
Question 9
4 / -1

A particle of charge –16 × 10^–18 coulomb moving with velocity 10ms^–1 along the x–axis enters a region where a magnetic field of induction B is along the y–axis, and an electric field of magnitude 10⁴ V/m is along the negative z–axis. If the charged particles continues moving along the x-axis, the magnitude of B is

A
10^–3 Wb/m²

B
10³ Wb/m²

C
10⁵ Wb/m²

D
10¹⁶ Wb/m²

Solution
Question 10
4 / -1

An electron and a proton have equal kinetic energies. They enter a magnetic field perpendicularly, then

A
Both will follow a circular path with same radius

B
Both will follow a helical path

C
Both will follow a parabolic path

D
All the statements are false