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Roll No:
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Application No:
Name:
Exam Date: 06-Oct-2020
Exam Time: 15:00-18:00
Examination: 1. Course Code - M.A./M.Sc./M.C.A.
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2. Field of Study - PHYSICS (SPSM)
SECTION 1 - SECTION 1
Question No.1 (Question Id - 2)
What is the decimal value of binary 1011.11 ?
(A) 14.50
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(B) 11.75 (Correct Answer)
(C) 16.25
(D) 9.25
Question No.2 (Question Id - 14)
An ideal gas is kept at constant pressure 'P'. The root mean square speed Vrms of the gas is doubled by heating at constant volume. Calculate the pressure of the ideal gas after heating.
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(A) 2P
(B) 4P (Correct Answer)
(C) 6P
(D) 8P
Question No.3 (Question Id - 42)
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The convex surface of a plano-convex glass lens with curvature radius 40 cm comes into contact with a glass plate. A certain ring observed in reflected light has a radius 2.5 mm. Watching the given ring, the lense was gradually removed from the plate by distance of 5 µm. What has the radius of that ring become equal to ?
(A) 6.00 mm
(B) 4.50 mm
(C) 3.00 mm
(D) 1.50 mm (Correct Answer)
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Question No.4 (Question Id - 18)
How much heat must be absorbed by ice of mass m = 700 gm at -15°C to take it to the liquid state at 10°C?
Given parameters.
Specific heat of ice(-15°C) = 2220 J/kg.K
water = 4187 J/kg.K
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Heat of fusion of water 333 kJ/kg.
(A) 233 kJ Approx
(B) 30 kJ Approx
(C) 286 kJ Approx (Correct Answer)
(D) 256 kJ Approx
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Question No.5 (Question Id - 36)
The resistance of a semiconductor decreases on heating. This is because :
(A) the material becomes harder on heating.
(B) parallel channels of current flow become available.
(C) more electrons become available for conduction. (Correct Answer)
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(D) the effective mass of an electron reduces on heating.
Case Study - 6 to 8 (Question Id - 45)
The 741C op-amp having the following parameters is connected as a non-inverting amplifier (figure 1) with R1 = 1 ?O and RF = 20 ?O;
Open loop voltage gain (A) = 2 x 105
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Open loop resistance of the op-amp = 2 ?O
Supply voltage = ±15 V
Output voltage swing = ±13 V
This download link is referred from the post: JNU Last 10 Years 2011-2021 Previous Question Papers with Answers
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