NEST (National Entrance Screening Test) Physics: Questions 49 - 52 of 58

Access detailed explanations (illustrated with images and videos) to 58 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.

Rs. 100.00 or

How to register?

Question number: 49

» Oscillations and Waves » Speed of a Wave

Edit

Appeared in Year: 2019

Essay Question▾

Describe in Detail

Two bodies of equal mass are suspended from two rigid supports by separate massless springs having spring constants and respectively. If the bodies oscillate vertically such that equal, the ratio of amplitude of oscillations of to that of is

Image shows The Maximum Velocity

Image Shows the Maximum Velocity

Image shows The Maximum Velocity

Explanation

Since maximum velocity

and

Taking ratio

Given

… (75 more words) …

Question number: 50

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

Edit

Appeared in Year: 2019

Essay Question▾

Describe in Detail

Consider three straight, coplanar, parallel wires of infinite length where the distance between adjacent wires is . Each wire carries a current in the same direction. The perpendicular distance from the middle wire (on either side) where the magnetic field vanishes is

Image shows The Magnetic field vanishes

Image Shows the Magnetic Field Vanishes

Image shows The Magnetic field vanishes

Explanation

Let the perpendicular distance from the middle wire be . Then the distance of wire and wires will be

Now magnetic field at point (at a distance from middle wire): -

Magnetic field due to wire

… (52 more words) …

Question number: 51

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

Edit

Appeared in Year: 2019

MCQ▾

Question

The sketch shown below illustrates the apparatus and results for a famous experiment, the graph is a polar plot of the number of electrons received in the detector.

Choices

Choice (4) Response

a.

There is magnetic domain inside a nickel sample

b.

Electron have spin half

c.

Electron in a beam can behave as wave

d.

The energy levels of an atom in a metal are quantised

Question number: 52

» Kinetic Theory of Gases » Heat Capacities and Its Relations

Edit

Appeared in Year: 2019

Essay Question▾

Describe in Detail

Consider the following linear model of a molecule of hydrogen Cyanide depicted below: -

Image shows linear model of a molecule of hydrogen Cyanide

Image Shows Linear Model of a Molecule of Hydrogen Cyanide

Image shows linear model of a molecule of hydrogen Cyanide

It follows that the molar specific heat of hydrogen cyanide gas at constant pressure must be –

Explanation

Degree of freedom

Molar specific heat at constant pressure :

… (60 more words) …