Guru Gobind Singh Indraprastha Vishwavidyalaya 2008 B.C.A Computer Application END term - physics - Question Paper
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(Please write your Exam Roll No,) Exam Roll No.
First Semester IBCA1 Deccmber-2008
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Paper Code: BCA109 |
Subject: Basics of Physics |
|
Paper Id: 2010S |
(Batch: 2005-2008) |
|
Time: 3 Hours |
Maximum Marks :7S |
|
Note: Q.1 is compulsory. Attempt one question from each unit. | |
Q1 (a) Two electric field lines cannot intersectis true or false. Justify.
(b) Give two examples each for conservative and non-conservative force.
(c) What is the physical significance of capacitance?
(d) According to Newton's third law any force is accompanied by an equal and opposite force. How can a movement take place?
(e) Can we use ac in electrolysis? Justify your answer.
(f) Give two examples of non-ohmic devices. Does the relation R=V/I holds for these?
(g) Can the kinetic energy of a system increased without applying any external force on it? Justify.
(h) A proton moving with speed 1.6x106 m/s in a straight line enters a strong magnetic field along the field direction. How shall its path and velocity changes.
(i) A meteriorite bums in the atmosphere before it reaches the earth's surface. What happens to its momentum?
(j) What are 'minority charge carriers' in semiconductor physics? (10x2.525)
UNm
Q2 (a) Is it possible for a particle to describe a curved path if no force acts on it? Does the answer depend upon the frame of reference chosen to view the particle? Justify. (7.5)
(b) Compute the initial upward acceleration of rocket of mass 1.3x104 kg if the initial upward force produced by its engine (the thrust) is 2.6x10s N. Do not neglect the weight of the rocket.(S)
Q3 (a) What do you understand by the term 'limiting friction? Discuss with the help of suitable examples. (6.5)
(b) A car of mass m is moving with velocity. If is the coefficient of friction between tyres and road, show that minimum stopping distance for car is s = v2 I pg. (6)
UNIT-M
Q4 (a) The energy equivalent to a mass m is given by the relation E=mc2. piscuss the experimental confirmation/justification for this relation. (3.5)
(b) Define the coefficient of restitution. What is its physical significance? (5)
(c) A block of mass m moving at a speed v collides with another block of mass 2m at rest. The lighter block comes to rest after the collision. Find the coefficient of restitution. (4)
Q5 (a) Show that in a perfect elastic collision of two bodies of equal mass m they interchange their velocities. (6)
(b) A vessel at rest explodes, breaking into three pieces. Two pieces, having equal mass, fly off perpendicular to one another with the same speed of 30 m/s. The third piece has three times the mass of each other piece. What are the direction and magnitude of its velocity immediately after explosion? (6.5)
UNIT-III
Q6 State Gauss's theorem. Derive expression for elastic field intensity () due to a non-conducting
charged solid sphere of radius at a point (a) inside the sphere, (b) on the surface of the
sphere, (c) outside this sphere. Show graphically the variation of E with distance from the center of the sphere. (12.5)
Q7 (a) Are Kirchhoffs laws applicable to both ac and dc circuits? (4)
(b) Define resistivity (p). Discuss the temperature dependence of resistivity in the context of conductor, semiconductor and insulators. (8.5)
UNIT-IV
Q8 (a) stale the Joule s law of heating effects of electric current. Is it reversible or not? (4)
(b) State and explain the Lenz's law. (4.5)
(c) Compare the properties of a normal conductor and a semiconductor. (4)
Q9 (a) Define neutral temperature and temperature of inversion for a thermocouple and set up a relation between the two. (6)
(b) State the Peltier effect. Discuss in brief how it is complimentary to the Seaback effect. (6.5)
(Please write your Exam Roll No,) Exam Roll No.
First Semester IBCA1 Deccmber-2008
|
Paper Code: BCA109 |
Subject: Basics of Physics |
|
Paper Id: 2010S |
(Batch: 2005-2008) |
|
Time: 3 Hours |
Maximum Marks :7S |
|
Note: Q.1 is compulsory. Attempt one question from each unit. | |
Q1 (a) Two electric field lines cannot intersectis true or false. Justify.
(b) Give two examples each for conservative and non-conservative force.
(c) What is the physical significance of capacitance?
(d) According to Newton's third law any force is accompanied by an equal and opposite force. How can a movement take place?
(e) Can we use ac in electrolysis? Justify your answer.
(f) Give two examples of non-ohmic devices. Does the relation R=V/I holds for these?
(g) Can the kinetic energy of a system increased without applying any external force on it? Justify.
(h) A proton moving with speed 1.6x106 m/s in a straight line enters a strong magnetic field along the field direction. How shall its path and velocity changes.
(i) A meteriorite bums in the atmosphere before it reaches the earth's surface. What happens to its momentum?
(j) What are 'minority charge carriers' in semiconductor physics? (10x2.525)
UNm
Q2 (a) Is it possible for a particle to describe a curved path if no force acts on it? Does the answer depend upon the frame of reference chosen to view the particle? Justify. (7.5)
(b) Compute the initial upward acceleration of rocket of mass 1.3x104 kg if the initial upward force produced by its engine (the thrust) is 2.6x10s N. Do not neglect the weight of the rocket.(S)
Q3 (a) What do you understand by the term 'limiting friction? Discuss with the help of suitable examples. (6.5)
(b) A car of mass m is moving with velocity. If is the coefficient of friction between tyres and road, show that minimum stopping distance for car is s = v2 I pg. (6)
UNIT-M
Q4 (a) The energy equivalent to a mass m is given by the relation E=mc2. piscuss the experimental confirmation/justification for this relation. (3.5)
(b) Define the coefficient of restitution. What is its physical significance? (5)
(c) A block of mass m moving at a speed v collides with another block of mass 2m at rest. The lighter block comes to rest after the collision. Find the coefficient of restitution. (4)
Q5 (a) Show that in a perfect elastic collision of two bodies of equal mass m they interchange their velocities. (6)
(b) A vessel at rest explodes, breaking into three pieces. Two pieces, having equal mass, fly off perpendicular to one another with the same speed of 30 m/s. The third piece has three times the mass of each other piece. What are the direction and magnitude of its velocity immediately after explosion? (6.5)
UNIT-III
Q6 State Gauss's theorem. Derive expression for elastic field intensity () due to a non-conducting
charged solid sphere of radius at a point (a) inside the sphere, (b) on the surface of the
sphere, (c) outside this sphere. Show graphically the variation of E with distance from the center of the sphere. (12.5)
Q7 (a) Are Kirchhoffs laws applicable to both ac and dc circuits? (4)
(b) Define resistivity (p). Discuss the temperature dependence of resistivity in the context of conductor, semiconductor and insulators. (8.5)
UNIT-IV
Q8 (a) stale the Joule s law of heating effects of electric current. Is it reversible or not? (4)
(b) State and explain the Lenz's law. (4.5)
(c) Compare the properties of a normal conductor and a semiconductor. (4)
Q9 (a) Define neutral temperature and temperature of inversion for a thermocouple and set up a relation between the two. (6)
(b) State the Peltier effect. Discuss in brief how it is complimentary to the Seaback effect. (6.5)
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