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  4. The energy required to break one bond in DNA is 10-20J . This value in eV is nearly

Q. The energy required to break one bond in DNA is . This value in eV is nearly

NEET NEET 2020Electrostatic Potential and Capacitance Report Error

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Questions from NEET 2020

1. The Brewsters angle for an interface should be:

Wave Optics

2. A ray is incident at an angle of incidence on one surface of a small angle prism(with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is . then the angle of incidence is nearly equal to:

Ray Optics and Optical Instruments

3. Two cylinders and of equal capacity are connected to each other via a stop clock. A contains an ideal gas at standard temperature and pressure. is completely evacuated. The entire system is thermally insulated. The stop clock is suddenly opened. The process is:

Thermodynamics

4. The energy equivalent of 0.5 g of a substance is:

Dual Nature of Radiation and Matter

5. A body weighs 72 N on the surface of the earth. What is the gravitational force on it, at a height equal to half the radius of the earth?

Gravitation

Questions from Electrostatic Potential and Capacitance

1. A little charged bead is inside the hollow frictionless sphere manufactured from the insulating material. Sphere has a diameter of . The mass of the bead is , its charge is . What minimum charge must carry an object at the bottom of the sphere to keep hold the charged bead at the vertex of the sphere in stable equilibrium?

NTA Abhyas 2020

2. A parallel plate capacitor is of area and a separation . The gap is filled with three dielectric materials of equal thickness (see figure) with dielectric constants and . The dielectric constant of a material which when fully inserted in above capacitor, gives same capacitance would be :

JEE Main 2019

3. A parallel plate capacitor with square plates is filled with four dielectrics of dielectric constants arranged as shown in the figure. The effective dielectric constant K will be :

JEE Main 2019

4. Figure shows a network of capacitors where the numbers indicates capacitances in micro Farad. The value of capacitance if the equivalent capacitance between point and is to be is :

JEE Main 2016

5. The capacitance of an air capacitor is the separation between the parallel plates is . A copper plate of thickness is introduced symmetrically between the plates. The capacitance now becomes

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

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