Q. Two ions having equal masses, but charges in the ratio 1:2 are projected perpendicular to a uniform magnetic field with speeds in the ratio 2:3. The ratio of the radii of the circular paths along which the two ions move is:

EAMCETEAMCET 2003 Report Error

4 : 3

2 : 3

3 : 2

1 : 4

Solution:

Given: The ion have equal masses Ratio of charges Ratio of speeds The necessary centripetal force for circular path is provided by magnetic force Hence

Questions from EAMCET 2003

1. A bird of mass 1.23 kg is able to hover by imparting t downward velocity of uniformly to air o density over an effective area . If the acceleration due to gravity is then the magnitude of

Mechanical Properties of Fluids

2. Two circular loops A and B or radii and respectively are made from a uniform wire. The ratio of their moments of inertia about axes passing through their centers and perpendicular to their planes is equal to

System of Particles and Rotational Motion

3. Between the plates of parallel plate capacitor of capacity , two parallel plates of the same material and area same as the plate of the original capacitor, are placed. If the thickness of these plates is equal to of the distance between the plates of the origin

Electrostatic Potential and Capacitance

4. Consider the following statements A and B. Identify the correct answers.
A. A zener diode is always connected in reverse bias.
B. The potential barrier of a p-n junction lies between 0.1 to 0.3 V, approximately.

Semiconductor Electronics: Materials Devices and Simple Circuits

5. A body of mass is tied to one end of a spring and whirled round in a horizontal plane with a constant angular velocity. The elongation in the spring is . If the angular velocity is doubled, the elongation in the string is . The original length of the spring is

Motion in a Plane

Physics Most Viewed Questions

1. A car starts from rest and accelerates at At , a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at ? (Take

NEET 2021 Motion in a Straight Line

2. If and respectively denote energy and gravitational constant, then has the dimensions of:

NEET 2021 Physical World, Units and Measurements

3. The de Broglie wavelength of an electron moving with kinetic energy of is nearly

NEET 2020 Dual Nature of Radiation and Matter

4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

NEET 2020 Electromagnetic Induction

5. Calculate the acceleration of the block and trolly system shown in the figure The coefficient of kinetic friction between the trolly and the surface is , mass of the string is negligible and no other friction exists

NEET 2020 Laws of Motion