Energy MCQ

Test your knowledge with important Energy MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Energy MCQs at Bissoy

• The limitation of the first law is
  ক

  does not indicate the possibility of a spontaneous process proceeding in a definite direction

  খ

  it assigns a quality to different forms of energy

  গ

  indicates the direction of any spontaneous process

  ঘ

  none of the mentioned
• A perpetual motion machine of first kind
  ক

  is a fictitious machine

  খ

  can supply mechanical work without dissipating energy

  গ

  violates first law

  ঘ

  all of the mentioned
• Which of the following is true in regard to the energy of an isolated system?
  ক

  dQ≠0

  খ

  dW≠0

  গ

  E=constant

  ঘ

  all of the mentioned
• In an ideal gas there are no intermolecular forces of attraction and repulsion, and the internal energy is a function of temperature only.
  ক

  true

  খ

  false
• The total internal energy of the system is given by
  ক

  U=N/ɛ

  খ

  U=Nɛ

  গ

  U=ɛ/N

  ঘ

  none of the mentioned
• Which of the following types of energy can be present in molecules?
  ক

  translational and rotational kinetic energy

  খ

  electronic energy and vibrational energy

  গ

  chemical energy and nuclear energy

  ঘ

  all of the mentioned
• (m*g*z) gives the
  ক

  macroscopic kinetic energy

  খ

  microscopic kinetic energy

  গ

  macroscopic potential energy

  ঘ

  microscopic potential energy
• (m*V*V)/2 gives the
  ক

  macroscopic kinetic energy

  খ

  microscopic kinetic energy

  গ

  macroscopic potential energy

  ঘ

  microscopic potential energy
• The specific energy, e=E/m is an extensive property.
  ক

  true

  খ

  false
• Energy is a
  ক

  point function

  খ

  property of the system

  গ

  extensive property

  ঘ

  all of the mentioned
• Practically, if 10kJ of energy is supplied to a device, how much energy will the device give back?
  ক

  Equal to10kJ

  খ

  Less than 10kJ

  গ

  More than 10kJ

  ঘ

  Zero
• Calculate the energy in the 5 ohm resistor in 20 seconds.
  ক

  21.5kJ

  খ

  2.15kJ

  গ

  2.15J

  ঘ

  21.5J
• A battery converts___________
  ক

  Electrical energy to chemical energy

  খ

  Chemical energy to electrical energy

  গ

  Mechanical energy to electrical energy

  ঘ

  Chemical energy to mechanical energy
• Calculate the energy in the 10 ohm resistance in 10 seconds.
  ক

  400J

  খ

  40kJ

  গ

  4000J

  ঘ

  4kJ
• Which among the following is an expression for energy?
  ক

  V2It

  খ

  V2Rt

  গ

  V2t/R

  ঘ

  V2t2/R
• Calculate the energy dissipated by the circuit in 50 seconds.
  ক

  50kJ

  খ

  50J

  গ

  100j

  ঘ

  100kJ
• Out of the following, which one is not a source of electrical energy?
  ক

  Solar cell

  খ

  Battery

  গ

  Potentiometer

  ঘ

  Generator
• A bulb has a power of 200W. What is the energy dissipated by it in 5 minutes?
  ক

  60J

  খ

  1000J

  গ

  60kJ

  ঘ

  1kJ
• Which among the following is a unit for electrical energy?
  ক

  V(volt)

  খ

  kWh(kilowatt-hour)

  গ

  Ohm

  ঘ

  C(coloumb)
• When a body moves with a constant speed along a circle ___________
  ক

  No work is done on it

  খ

  No acceleration is produced in it

  গ

  Its velocity remains constant

  ঘ

  No force acts on it
• Assertion: In and elastic collision of two billiard balls, the total kinetic energy is conserved during the short time of collision of balls. Reason: Energy spent against friction does not follow the law of conservation of energy
  ক

  Both assertion and reason are true and the reason is the correct explanation of the assertion

  খ

  Both assertion and reason are true but the reason is not the correct explanation of the assertion

  গ

  Both assertion and reason are false

  ঘ

  Assertion is true but the reason is false
• In elastic collision, 100% energy transfer takes place when ___________
  ক

  m1=2m2

  খ

  m1 is greater than m2

  গ

  m1 is lesser than m2

  ঘ

  m1=m2
• Two particles are seen to collide and move jointly together after the collision. During such a collision, for the total system ___________
  ক

  Neither the mechanical energy nor the linear momentum is conserved

  খ

  Mechanical energy is conserved, but not the linear momentum

  গ

  Both the mechanical energy and the linear momentum are conserved

  ঘ

  Linear momentum is conserved, but not the mechanical energy
• Momentum is conserved in all collisions but not kinetic energy.
  ক

  True

  খ

  False
• If the water falls from a dam into a turbine wheel 19.6m below, then the velocity of water at the turbine is? (g=9.8m/s)
  ক

  9.8m/s

  খ

  19.6m/s

  গ

  39.2m/s

  ঘ

  98m/s
• The decrease in potential energy of a ball of mass 20kg, which falls from a height of 50cm, is?
  ক

  968J

  খ

  98J

  গ

  1980J

  ঘ

  450J
• The kinetic energy of a body becomes four times of its initial value, then new momentum will ___________
  ক

  Become twice its initial value

  খ

  Become thrice its initial value

  গ

  Become four times its initial value

  ঘ

  Remains constant
• Kinetic energy with any reference must be ___________
  ক

  Zero

  খ

  Positive

  গ

  Negative

  ঘ

  Either negative or positive
• A boy carrying a box on his head is walking on a level load from one place to another on a straight road is doing no work. The statement is?
  ক

  Correct

  খ

  Incorrect

  গ

  Partly correct

  ঘ

  Insufficient data