KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 74 - 76 of 268

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Question number: 74

» Work, Energy and Power » Elastic and Inelastic Collisions

Appeared in Year: 2011

MCQ▾

Question

An electron collides with free molecules initially in its ground state. The collision leaves the molecules in an excited state that is metastable and does not decay to the ground state by radiation. Let K be the sum of the initial kinetic energies of the electron and the molecule, and P the sum of their initial momenta. Let K’ and P’ represent the same physical quantities after the collision. Then –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 75

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

Appeared in Year: 2012

MCQ▾

Question

A loop carrying current Ι has the shape of a regular polygon of n sides. If R is the distance from the centre to any vertex, then the magnitude of the magnetic induction vector Equation at the centre of the loop is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 76

» Kinematics » Motion in a Plane

Appeared in Year: 2011

MCQ▾

Question

The surface of a planet is found to be uniformly charged. When a particle of mass m and no charge is thrown at an angle from the surface of the planet, it has a parabolic trajectory as in projectile motion with horizontal range L. A particle of mass m and charge q, with the same initial conditions has a range Equation . The range of particle of mass m and charge 2q with the same initial conditions is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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