Exam Details
| Subject | Physics | |
| Paper | ||
| Exam / Course | Diploma in Civil Engineering (DCLE) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2015 | |
| City, State | new delhi, |
Question Paper
1. Choose the correct answer:
For steady flow, the velocity of flow
changes with time
remains constant with time
changes with space coordinate
remains constant with space coordinate
Centre of buoyancy is
same as the centre of gravity of body
the centre of volume of liquid displaced by body
same as metacentre
same as centre of pressure
Fourier's law of heat conduction is given as, where Q is the amount of heat flow AT change in temperature:
Q/AT AT/Ax
Q/AT k/A dx/dt
Q/dA kAt dx/dt
Qk/AT A AT/Ax
The net potential energy for three point charges q1, q2 and q3 is given as
q1q2q3/4n€or12
q2q3q1/4n€or23
(q1q2/4n€or12) (q2q3/4n€or23) (q1q3/4n€or13)
1/4n€o(q1q2 q2q3 r12 r23 r31)
At a distance of 60 m from a jet airliner engaged in take-off, the intensity of sound is 1 W/m^2. What is the intensity at a distance of 180 m in the same direction?
0.22
0.44
0.30
0.11
The magnetic field due to current carrying wire, carrying a current I at a distance r is given as
B MoI/2nr
B MoI^2/2nr
B MoI^2/2nr^2
B Mo sqrt(I)/2nr
In a simple harmonic motion, the acceleration is given by
a w^2 sqrt(x)
a
a
a w^2x
How many ice cubes (at must be added to a bowl containing a litre of boiling water at 100°C, so that the resulting mixture reaches a temperature of 40°C Assume that each ice cube has a mass of 20 g and that the bowl and the environment do not exchange heat with the water.
Define the various kinds of specific heat of a gas. Also prove the relationship Cp Cv where Cp and Cv are the specific heat at constant pressure and volume respectively and R is the universal gas constant.
Explain Transverse and Longitudinal wave motion with suitable examples.
Briefly explain the periodic waves.
An ocean wave has a wavelength of 120 m and a period of 8·77 s. Calculate the frequency and speed of this wave.
An object of size 3.0 cm is placed at a distance of 14 cm in front of a concave lens of focal length 28 cm. Calculate the distance of the image formed. What type of image will it be?
What is a 'Mirage' and why does it occur Explain in detail with the help of a neat diagram.
Derive the equation of continuity in Cartesian coordinates.
When a solid rubber ball is taken from the surface to the bottom of a lake, its volume decreases by 0.0012%. The depth of the lake is 360 density of lake water is 10^3 kg/m^3 . Calculate the bulk modulus of rubber. Take g =10 .
Discuss in detail the Faraday's laws of electrolysis and applications of electrolysis.
Calculate the current flowing through each resistor in the circuit shown in Figure 1.
<img src='./qimages/15354-6b.jpg'>
7. Write short notes on any four of the following:
Venturimeter
Luminous Intensity
Meter Bridge
Biot-Savart Law
Specific Heat Capacity
Cyclotron
For steady flow, the velocity of flow
changes with time
remains constant with time
changes with space coordinate
remains constant with space coordinate
Centre of buoyancy is
same as the centre of gravity of body
the centre of volume of liquid displaced by body
same as metacentre
same as centre of pressure
Fourier's law of heat conduction is given as, where Q is the amount of heat flow AT change in temperature:
Q/AT AT/Ax
Q/AT k/A dx/dt
Q/dA kAt dx/dt
Qk/AT A AT/Ax
The net potential energy for three point charges q1, q2 and q3 is given as
q1q2q3/4n€or12
q2q3q1/4n€or23
(q1q2/4n€or12) (q2q3/4n€or23) (q1q3/4n€or13)
1/4n€o(q1q2 q2q3 r12 r23 r31)
At a distance of 60 m from a jet airliner engaged in take-off, the intensity of sound is 1 W/m^2. What is the intensity at a distance of 180 m in the same direction?
0.22
0.44
0.30
0.11
The magnetic field due to current carrying wire, carrying a current I at a distance r is given as
B MoI/2nr
B MoI^2/2nr
B MoI^2/2nr^2
B Mo sqrt(I)/2nr
In a simple harmonic motion, the acceleration is given by
a w^2 sqrt(x)
a
a
a w^2x
How many ice cubes (at must be added to a bowl containing a litre of boiling water at 100°C, so that the resulting mixture reaches a temperature of 40°C Assume that each ice cube has a mass of 20 g and that the bowl and the environment do not exchange heat with the water.
Define the various kinds of specific heat of a gas. Also prove the relationship Cp Cv where Cp and Cv are the specific heat at constant pressure and volume respectively and R is the universal gas constant.
Explain Transverse and Longitudinal wave motion with suitable examples.
Briefly explain the periodic waves.
An ocean wave has a wavelength of 120 m and a period of 8·77 s. Calculate the frequency and speed of this wave.
An object of size 3.0 cm is placed at a distance of 14 cm in front of a concave lens of focal length 28 cm. Calculate the distance of the image formed. What type of image will it be?
What is a 'Mirage' and why does it occur Explain in detail with the help of a neat diagram.
Derive the equation of continuity in Cartesian coordinates.
When a solid rubber ball is taken from the surface to the bottom of a lake, its volume decreases by 0.0012%. The depth of the lake is 360 density of lake water is 10^3 kg/m^3 . Calculate the bulk modulus of rubber. Take g =10 .
Discuss in detail the Faraday's laws of electrolysis and applications of electrolysis.
Calculate the current flowing through each resistor in the circuit shown in Figure 1.
<img src='./qimages/15354-6b.jpg'>
7. Write short notes on any four of the following:
Venturimeter
Luminous Intensity
Meter Bridge
Biot-Savart Law
Specific Heat Capacity
Cyclotron
Other Question Papers
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