Physics Work Power and Energy Mcqs
The example of negative work is:
(a) Work done under a conservative force
(b) Work done perpendicular to a conservation force
(c) Work done against friction,
(d) Work done against gravity
2. The work done by centripetal force is:
(a) Equal to that of centrifugal force. (b) Greater than that of centrifugal force
(c) Variable in different cases. (d) Zero
3. Work is defined as
(a) Scalar product of force and displacement.
(b) Vector product of force and displacement
(c) Scalar product of force and velocity
(d) Vector product of force and velocity
4. The work done on a body under going a certain displacement is given by:
(a) The area under a force vs. time curve
(b) The area under a force vs. distance curve
(c) The area under a velocity vs time curve
(d) The area under an acceleration vs time curve
5. Work is always done in a body when
(a) A force action on it
(b) It covers some displacement.
(c) Force moves it in its direction or in opposite directions
(d) The resultant force on its is zero.
6. The work given to the machine is called:
(a) Input (b) Output
(c) Velocity ratio (d) Mechanical advantage
7. All of them are true accept:
(a) Work is defined as the product of force and distance.
(b) Joule is the unit of work.
(c) Force moves in its direction or in opposite directions.
(d) The resultant force on it is zero.
8. Work done will be zero when force and displacement are
(a) In the same direction (b) In opposite direction
(c) Perpendicular to each other (d) Not zero
9. The energy due the motion of a mass is known as.
(a) A. Potential energy (b) Motion energy
(c) Mobile energy (d) Kinetic energy
10. The amount of work required to stop a moving object is equal to the:
(a) Velocity of the object (b) Kinetic energy of the object
(c) Mass of the object times its acceleration
(d) Mass of the object times its velocity
11. Power is the dot product of.
(a) Mass & velocity (b) Force & velocity
(c) Force & Energy (d) Force & mass
12. The sum of kinetic and potential energies of a falling body
(a) Is constant at all points. (b) Is maximum in the beging
(c) Is minimum in the beginning (d) Is maximum in the middle of the path
13. Potential energy is increased when the work is done,
(a) Along the field (b) Against the field
(c) By the field (d) All of the above in different cases
14. If the velocity of the moving particle is double the factor by, which the K. E is increased is.
(a) 4 (b) ½ (c) 2 (d) 6
15. The heat energy is transferred to a body, it is converted into:
(a) Internal energy of the body (b) work done by the body
(c) Mass of the molecules (d) Potential energy of the body
16. The tidal energy is due to:
(a) The rotation of earth about sun (b) The rotation of earth relative moon
(c) The radio active decay inside earth (d) Attraction of sun and moon
17. Energy is:
(a) Work divided by time (b) The ability to do work
(c) Measurable in Horse Power (d) Force divided by distance
18. The work done in moving a object along a vector=3i + 2j – 5k. If the applied force is F = 2i–j – k:
(a) 10j (b) 6i – 2j – 5k (c) 0j (d) 9j
19. The power required to lift a 40 kg. weight up to the height of 5 m in 10 sec will be
(a) 80 watts (b) 200 watts (c) 28 watts (d) 14000 watts
20. The K. E of a 1000 kg car moving at a speed of 80 km/hr will be.
(a) 2.47×108 J (b) 2.47×105 J (c) 24.7×107 J (d) 24.7×103 J
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The Scope of Physics Mcqs
THE SCOPE OF PHYSICS
1. Physics can be defined as the study of:
(a) Chemical Properties of matter (b) Physical properties of matter
(b) Relation between matter and energy (d) Both (b) and (c)
2. Physics can be defined as a branch of science based on a:
(a) Aberration and analysis of facts
(b) Experimental observation and quantitative measurement.
(c) Mathematical calculation and interpretation.
(d) Replication and verification of known facts.
3. The branch of physics deals with the study if production propagation and properties:
(a) Magnetics (b) Optics (c) Statics (d) Acoustics
4. High energy physics deal with the:
(a) Study of electron behavior (b) Study of electronic charges
(c) Study of mechanics of energetic bodies.
(d) Study of properties and behavior of elementary particles.
5. The ancient Greeks originated the idea that:
(a) Matter and energy are the same thing
(b) Perpetual motion is not possible.
(c) Matter is discontinues
(d) Matter does not exist in different forms.
6. Archimedes the Greek physicist has made significant contributions in the field of.
(a) High energy physics and electronics
(b) Nuclear and atomic Physics
(c) Mechanics hydraulics and hydrostatics
(d) Special theory of relativity
7. Al-Beruni is famous for finding out the
(a) Distance of moon from earth (b) Mass of the earth
(b) Diameter of earth’s orbit (d) Circumference of the earth
8. The book “Kitab-ul-Qanoon-ul-Masoodi” was written by
(a) Iben-e-Sina (b) Al-Razi
(c) Abu-Rehan Al-Beruni (d) Ibn-al-Haitham
9. Dr. Asalam was awarded noble Prize for has work on.
(a) Electronics (b) Radiations
(c) Optics (d) Grand unification theory
10. The first book on analytical “Hisab-ul-jabrwai-Moqab” was written by:
(a) Al-Khawarzmi (b) Al-Beruni
(c) Al-Razi (d) Ibn-e-sina
11. “Kitab-ul-Manazir” the famous book on optical is written by
(a) Ibn-e-Sina (b) Al-Khawrzmi
(c) Jabir-bin-Hayan (d) Ibn-ul-Hailham
12. In international system of units, the length mass time electric current temperature, intensity of light
and quantity of light and quantity are called
(a) Derived (b) basic
(c) Fundamental (d) only (b) and (c)
13. Written of the flowing physical quantity will be different units as compared to that of others:
(a) Weight (b) Tension
(c) Buoyant Force (d) Electromotive Force
14. Which one of the following is not of the same quantity?
(a) Horse (b) Calorie (c) Joules (d) BTU
15. The S.I unit of current is:
(a) one volt (b) One
(c) One ampere (d) One ohm-m
16. The famous mathematical and the founder of algebra was.
(a). Al Kindi (b) AL Khwarizmi
(c). Al Beruni (d) Naserudin tusi
17. Light year is a unit of
(a). Distance (b) Light (c) Time (d) Pressure
18. Some of the basic S.I. units are:
(a) Second Ampere mole (b) Kelvin Ampere watt
(c) Candela Mole volt (d) Meter Second watt
19. 10-9 second are equivalent to:
(a) Deci Second (b) Nano Second
(c) Milli second (d) Micro second
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20. The S. I unit of temperature is:
(a) Fahrenheit (b) Kelvin (c) Centigrade (d) Farad
21. One Angstrom equal
(a) 10-8 cm (b) 108 m (c) 10-6 (d) 108 mm
22. In Physics the term “dimension” represent the:
(a) mechanical nature of a quantity (b) chemical nature of quantity
(c) Physical nature of quantity (d) electric nature of quantity
23. Dimension of pressure is:
(a) ML-1 T-2 (b) ML-2 T-3 (c) ML-2 T-4 (d) ML T-1
24. Which one of the following represents the dimension of power
(a) L2 T2 (b) MLT2 (c) ML2 T-3 (d) ML-2 T
25. Which one of the following represent dimension for the unit of torque.
(a) M2 LT2 (b) ML2 T2 (c) M2 LT2. (d) MLT2
26. 0.0084 has ____________ significant figure.
(a) 2 (b) 4 (c) 5 (d) 1
27. The dimension of angular momentum similar to that of.
(a) energy (b) heat (c) Plank’s constant (d) work
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