DEPARTMENT OF SCIENCE AND HUMANITIES
QUESTION BANK
SUBJECT CODE:25PH101 SUBJECT NAME: ENGINEERING PHYSICS
UNIT 1- MECHANICS AND CONSERVATION OF ENERGY
1 1. A floating buoy in the ocean generates electricity when waves move it up and
down. Which type of energy conservation takes place.
a. Mechanical to Electrical b. Solar to Electrical
c. Chemical to Heat d.Mechanical to Electrical
2. During live concerts, piezoelectric crystals are installed under the dance floor
to generate electricity. Which factor determines power output?
a. sound waves only b. Room temperature
c. weight and movement of people d. color to floor
3. What will be the energy possessed by a stationary object of mass 10kg placed
at a height of 20m above the ground?
a.19J b.1196J c.1960J d.19.6J
4. A Student claims that energy is produced in machine. Justiy why this answer
is incorrect on energy conservation principle.
2 1. Which of the following formulas correctly represents gravitational potential
energy?
a. PE=mgh b. PE=m+g+h c. PE=mXg-h d. PE=mXg/2h
2. To convert sound energy into electrical energy, which device is used?
a.Microphone b.Refrigerator c.Micro oven d.Compact flourescent
lamp
3. When a weight of 500 N falls on a spring stiffness 0.5kN/m from a height of
2m. What is the maximum deflection caused in first fall?
a.2m b.4m c.1m d.0.63m
4. Why is the law of conservation of energy is valid in mechanical system?
Justify your answer an example.
3 1. 1.In japan, subway stations use piezoelectric floors to power display boards,
what is the main benefit?
a. Free wi-fi b.Faster trains c. Noise Pollution d.Energy conservation
2. Justify why a ball thrown vertically upwards has zero kinetic energy at its
maximum height, but its mechanical energy is not zero
3. A car and bicycle are moving at the same speed. Justify which one has
greater kinetic energy and why?
4 1. In the energy transformation of a hydroelectric dam, the ---------------- energy
of stored water is first converted into Kinetic energy of moving water, which
then spins to produce--------------- energy
a. Potential, Electrical b. Potential, Thermal
c. Kinetic, Electrical d. Kinetic, Thermal
, 2. A battery lights a bulb. Describe the energy changes involved in the process
a. Electrical to chemical energy b. chemical to electrical energy
c. chemical to light energy d. light to chemical energy
3. A freely falling object eventually stops on reaching the ground. What
happened to its kinetic energy?
4. Illustrate the law of conservation of energy by discussing the energy changes
which occur when we draw a pendulum bob to one side and allow it to
oscillate. Why does the bob eventually come to rest? What happens to its
energy eventually? Is it a violation of conservation of energy?
5 1. 1.If two balls of the same mass are thrown-one upward and one downward-
how do their energies compare at the same height?
a.At same height- Both ball have same Potential Energy b..At same height-
Both ball have same Kinetic Energy c. At same height- Both ball have same
Zero energy d.Not reelevant answer
2. Can an object have potential energy without kinetic energy? Can it have
kinetic energy without potential energy? Give examples.
3. In a swing, Maximum potential energy at--------------------positions and when
maximum kinetic energy at-------------- position
a. At extreme position-Maximum PE, Zero KE At Lowest position -
Maximum KE, Minimum PE
b. At extreme position-Maximum KE, Zero PE At Lowest position -
Maximum KE, Minimum PE
c. At extreme position-Maximum PE, Zero KE At Lowest position -
Maximum PE, MinimumKE
d. At extreme position- PE constant, zero KE At Lowest position - constant
KE, Minimum PE
4. When a Battery is used to power torch a , the stored energy inside the battery
undergoes a transformation . What type of energy is initially stored in the
battery
a. Nuclear Energy b. Thermal Energy c. Heat Energy d. Light Energy
5. Solar Panels Installed on house rooftops capture sunlight and convert it into -
-------------- using photovoltaic cells. This technology allows people to use a
clean source of power instead of burning
a. Electrical energy b. Light energy c. Nuclear Energy d. Tidal Energy
6 1. 1.A box of 5Kg rests on a horizontal surface. What is the normal force acting
on it? Take g= 9.8m/s2
a.4.9N b.0.49N c.49N d.490N
2. If the Coefficient of static friction between the box and floor is Us=0.4, what
is the maximum static friction?
a.196N b.19.6N c.1960N d.19N
3. If the Coefficient of kinetic friction between the box and floor is Uk=0.3,
what is the maximum kinetic friction?
a.147N b.1.47N c.1470N d.14.7N
4. If a horizontal force of 10N is applied to the box, what will happen?Take
fs,max=19.6 N
QUESTION BANK
SUBJECT CODE:25PH101 SUBJECT NAME: ENGINEERING PHYSICS
UNIT 1- MECHANICS AND CONSERVATION OF ENERGY
1 1. A floating buoy in the ocean generates electricity when waves move it up and
down. Which type of energy conservation takes place.
a. Mechanical to Electrical b. Solar to Electrical
c. Chemical to Heat d.Mechanical to Electrical
2. During live concerts, piezoelectric crystals are installed under the dance floor
to generate electricity. Which factor determines power output?
a. sound waves only b. Room temperature
c. weight and movement of people d. color to floor
3. What will be the energy possessed by a stationary object of mass 10kg placed
at a height of 20m above the ground?
a.19J b.1196J c.1960J d.19.6J
4. A Student claims that energy is produced in machine. Justiy why this answer
is incorrect on energy conservation principle.
2 1. Which of the following formulas correctly represents gravitational potential
energy?
a. PE=mgh b. PE=m+g+h c. PE=mXg-h d. PE=mXg/2h
2. To convert sound energy into electrical energy, which device is used?
a.Microphone b.Refrigerator c.Micro oven d.Compact flourescent
lamp
3. When a weight of 500 N falls on a spring stiffness 0.5kN/m from a height of
2m. What is the maximum deflection caused in first fall?
a.2m b.4m c.1m d.0.63m
4. Why is the law of conservation of energy is valid in mechanical system?
Justify your answer an example.
3 1. 1.In japan, subway stations use piezoelectric floors to power display boards,
what is the main benefit?
a. Free wi-fi b.Faster trains c. Noise Pollution d.Energy conservation
2. Justify why a ball thrown vertically upwards has zero kinetic energy at its
maximum height, but its mechanical energy is not zero
3. A car and bicycle are moving at the same speed. Justify which one has
greater kinetic energy and why?
4 1. In the energy transformation of a hydroelectric dam, the ---------------- energy
of stored water is first converted into Kinetic energy of moving water, which
then spins to produce--------------- energy
a. Potential, Electrical b. Potential, Thermal
c. Kinetic, Electrical d. Kinetic, Thermal
, 2. A battery lights a bulb. Describe the energy changes involved in the process
a. Electrical to chemical energy b. chemical to electrical energy
c. chemical to light energy d. light to chemical energy
3. A freely falling object eventually stops on reaching the ground. What
happened to its kinetic energy?
4. Illustrate the law of conservation of energy by discussing the energy changes
which occur when we draw a pendulum bob to one side and allow it to
oscillate. Why does the bob eventually come to rest? What happens to its
energy eventually? Is it a violation of conservation of energy?
5 1. 1.If two balls of the same mass are thrown-one upward and one downward-
how do their energies compare at the same height?
a.At same height- Both ball have same Potential Energy b..At same height-
Both ball have same Kinetic Energy c. At same height- Both ball have same
Zero energy d.Not reelevant answer
2. Can an object have potential energy without kinetic energy? Can it have
kinetic energy without potential energy? Give examples.
3. In a swing, Maximum potential energy at--------------------positions and when
maximum kinetic energy at-------------- position
a. At extreme position-Maximum PE, Zero KE At Lowest position -
Maximum KE, Minimum PE
b. At extreme position-Maximum KE, Zero PE At Lowest position -
Maximum KE, Minimum PE
c. At extreme position-Maximum PE, Zero KE At Lowest position -
Maximum PE, MinimumKE
d. At extreme position- PE constant, zero KE At Lowest position - constant
KE, Minimum PE
4. When a Battery is used to power torch a , the stored energy inside the battery
undergoes a transformation . What type of energy is initially stored in the
battery
a. Nuclear Energy b. Thermal Energy c. Heat Energy d. Light Energy
5. Solar Panels Installed on house rooftops capture sunlight and convert it into -
-------------- using photovoltaic cells. This technology allows people to use a
clean source of power instead of burning
a. Electrical energy b. Light energy c. Nuclear Energy d. Tidal Energy
6 1. 1.A box of 5Kg rests on a horizontal surface. What is the normal force acting
on it? Take g= 9.8m/s2
a.4.9N b.0.49N c.49N d.490N
2. If the Coefficient of static friction between the box and floor is Us=0.4, what
is the maximum static friction?
a.196N b.19.6N c.1960N d.19N
3. If the Coefficient of kinetic friction between the box and floor is Uk=0.3,
what is the maximum kinetic friction?
a.147N b.1.47N c.1470N d.14.7N
4. If a horizontal force of 10N is applied to the box, what will happen?Take
fs,max=19.6 N
