## Question

### Solution

Correct option is Charge of -particle = 2e, mass of -particle = 4m, where e is charge of a proton and m its mass. . Therefore, r will be same if is the same for both particles, i.e. Which gives #### SIMILAR QUESTIONS

Q1

An electron is projected in a uniform electric field in a direction at right angles to the field. The trajectory of the electron will be

Q2

An electron and a proton are projected in a uniform magnetic field with equal initial linear momenta in a direction perpendicular to the field. Then

Q3

An electron and a proton are projected in a uniform magnetic field with equal kinetic energies in a direction perpendicular to the field. Then

Q4

A beam of electrons is projected with a velocity in a region of crossed electric and magnetic fields E and B. If E = 800 Vm–1, the magnitude of B for electron beam to pass through the fields undeviated will be

Q5

A proton (mass m, charge e), projected with a velocity v passes undeviated through a region of crossed electric and magnetic fields. With what velocity should an alpha-particle (mass 4 m, charge 2e) be projected so that it passes undeviated through the same region?

Q6

Two electron beams having velocities in the ratio of 1 : 2 are subjected separately to identical magnetic fields. The ratio of deflections produced is

Q7

A uniform magnetic field is present in the vertically downward direction in a given region. When an electron is projected in a horizontal direction to the right, it will be moving in a circular path with constant speed

Q8

In a cathode ray tube, the electrons are subjected to a potential difference of 182 V. The maximum speed acquired by the electrons is

Q9

Electrons are projected with a velocity of at right angles to a magnetic field of . If the radius of the circular path of electrons is 1 cm, what is the specific charge (charge to mass ratio) of electrons?

Q10

A proton projected with kinetic energy K describes a circle of radius r in a uniform magnetic field. With what kinetic energy should an -particle be projected in the same magnetic field so that it describes a circle of radius 2r?