IFS (Forests Services) Physics (Mains): Questions 6 - 11 of 34

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Question number: 6

» Electricity and Magnetism » Current Electricity » Self and Mutual Inductances

Appeared in Year: 2012

Essay Question▾

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Explain the term ‘mutual inductance’ between two coils carrying current. Describe a method of determining mutual inductance between two coils of wire with relevant theory. (Paper-1) (Section-B)

Explanation

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Question number: 7

» Quantum Mechanics I » Uncertainty Principle

Appeared in Year: 2011

Essay Question▾

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On the basis of uncertainty principle calculate the size of Hydrogen atom.

(Paper-2) (Section - A)

Explanation

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Question number: 8

» Classical Mechanics » System of Particles » Generalised Coordinates and Momenta

Appeared in Year: 2012

Essay Question▾

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Starting with Newton’s second law of motion, establish D’ Alembert’s principle and discuss its significance? (Paper-1) (Section –A)

Explanation

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Question number: 9

» Nuclear Physics » Angular Momentum

Appeared in Year: 2011

Essay Question▾

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(i) What angle do the make with the z – axis when for an electron?

(ii) Determine the value of the total angular momentum for a 3d electron.

(Paper-2) (Section – A)

Explanation

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Question number: 10

» Physical Optics » Polarisation and Modern Optics » Principles of Fibre Optics Attenuation

Appeared in Year: 2012

Essay Question▾

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A step – index silica fiber consists of core of refractive index 1.450 and diameter . If the numerical aperture of the fiber is 0.16, calculate:

(i) the acceptance angle of the fiber,

(ii) refractive index of the cladding, and

(iii) if the fiber is immersed in water of refractive index 1.33, how does the acceptance angle change? (paper -1) (Section – A)

Explanation

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Question number: 11

» Physical Optics » Interference » Interference of Light-Young's Experiment

Appeared in Year: 2013

Essay Question▾

Describe in Detail

In a double slit interference experiment, show that the fringe shape is hyerbola. (Section A)

Explanation

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