If the radius of a sphere is measured to be (.2.1±0.05.)cm. Calculate the surface area (in cm2 ) .

Questions from NTA Abhyas 2020

1. A bob of mass is suspended by a massless string of length . The horizontal velocity at position is just sufficient to make it reach point . The angle at which the speed of the bob is half of that at satisfies

Work, Energy and Power

2. The velocity displacement graph of a particle moving along a straight line is -

The most suitable acceleration-displacement graph will be

Motion in a Straight Line

3. A drum of radius and mass rolls down without slipping along an inclined plane of angle . The frictional force

System of Particles and Rotational Motion

4. A sample of is used internally as a medical diagnostic tool to look for the effects of the positron decay . How long does it take for of the to decay?

Nuclei

5. If the mass of neutron , then the de-Broglie wavelength of neutron of energy is

Physics Most Viewed Questions

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

NEET 2021 Physical World, Units and Measurements

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

NEET 2020 Dual Nature of Radiation and Matter

3. 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

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. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury

NEET 2020 Mechanical Properties of Fluids

Q. If the radius of a sphere is measured to be Calculate the surface area (in ) .

Questions from NTA Abhyas 2020

1. A bob of mass is suspended by a massless string of length . The horizontal velocity at position is just sufficient to make it reach point . The angle at which the speed of the bob is half of that at satisfies

2. The velocity displacement graph of a particle moving along a straight line is -

The most suitable acceleration-displacement graph will be

3. A drum of radius and mass rolls down without slipping along an inclined plane of angle . The frictional force

4. A sample of is used internally as a medical diagnostic tool to look for the effects of the positron decay . How long does it take for of the to decay?

5. If the mass of neutron , then the de-Broglie wavelength of neutron of energy is

Physics Most Viewed Questions

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

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

3. 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

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,

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury

Latest Updates

Q. If the radius of a sphere is measured to be Calculate the surface area (in ) .

Questions from NTA Abhyas 2020

1. A bob of mass is suspended by a massless string of length . The horizontal velocity at position is just sufficient to make it reach point . The angle at which the speed of the bob is half of that at satisfies

2. The velocity displacement graph of a particle moving along a straight line is - The most suitable acceleration-displacement graph will be

3. A drum of radius and mass rolls down without slipping along an inclined plane of angle . The frictional force

4. A sample of is used internally as a medical diagnostic tool to look for the effects of the positron decay . How long does it take for of the to decay?

5. If the mass of neutron , then the de-Broglie wavelength of neutron of energy is

Physics Most Viewed Questions

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

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

3. 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

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,

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ? (density of mercury

Latest Updates

2. The velocity displacement graph of a particle moving along a straight line is -

The most suitable acceleration-displacement graph will be

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury