All questions of Energy Transfer & Conservation for Year 10 Exam

• a)
  60 W
• b)
  70 W
• c)
  80 W
• d)
  90 W

• a)
  7500 W
• b)
  250 W
• c)
  25000 W
• d)
  500 W

• a)
  79.5 J
• b)
  318 J
• c)
  0 J
• d)
  159 J

• a)
  6 m
• b)
  16.6 m
• c)
  26.6 m
• d)
  6.6 m

• a)
  power
• b)
  work
• c)
  momentum
• d)
  gravitational intensity

• A:

  30 J

• B:

  60 J

• C:

  18 J

• D:

  36 J

The answer is a.

• a)
  7 kilo joules
• b)
  7 x 10⁶ J
• c)
  700 J
• d)
  70000 J

• a)
  15 km/s
• b)
  0.5 m/s
• c)
  5 m/s
• d)
  5 Km/s

• a)
  250 J
• b)
  0 J
• c)
  282 J
• d)
  141 J

• a)
  electron volt
• b)
  W/s
• c)
  kW h
• d)
  joule

• a)
  momentum
• b)
  acceleration
• c)
  potential energy
• d)
  kinetic energy

• a)
  15 J
• b)
  40 J
• c)
  20 J
• d)
  30 J

• a)
  20m
• b)
  980m
• c)
  10m
• d)
  none of these

• a)
  100 W
• b)
  100000 W
• c)
  1k W
• d)
  1000 W

• a)
  negative, positive or zero
• b)
  always positive
• c)
  always zero
• d)
  always negative

• a)
  Manish pulls the trolley for a certain distance
• b)
  Mira studies for her exam
• c)
  Manoj pushes the wall with no change in the position of wall
• d)
  Mira pulls the wall with no change in the position of wall

• a)
  75 J
• b)
  25 J
• c)
  100 J
• d)
  50 J

• a)
  Kinetic energy
• b)
  Potential energy
• c)
  Sound energy
• d)
  Both kinetic energy and potential energy

• a)
  only potential energy
• b)
  only kinetic energy
• c)
  both potential and kinetic energy
• d)
  neither potential nor kinetic energy

• a)
  250 J
• b)
  2500 J
• c)
  25 x 10³ J
• d)
  2.5 x 10⁵ J

• a)
  becomes 4 times
• b)
  becomes 1/2 times
• c)
  no change
• d)
  becomes 1/4 times

• A:

   

  9 ×10⁶J 

• B:

  5 × 10⁸ Joule

• C:

   

  10 × 10⁵Joule 

• D:

   

  9 ×10⁸J 

The answer is d.

• a)
  Double
• b)
  Become Half
• c)
  Become one fourth
• d)
  Remain same

• a)
  70.66 J
• b)
  78.12 J
• c)
  100 J
• d)
  25.5 J

• a)
  (b) and (c) are correct
• b)
  (a), (b) and (c) are correct
• c)
  (a) and (b) are correct
• d)
  All of these

• a)
  10 joule
• b)
  5 joule
• c)
  1 joule
• d)
  Depends on time

• a)
  1 unit
• b)
  0.5 unit
• c)
  1.5 units
• d)
  none of these

• a)
  
• b)
  
• c)
  
• d)
  

• a)
  90⁰
• b)
  0⁰
• c)
  60⁰
• d)
  45⁰

• a)
  1 Gigawatt is equal to 10⁹W
• b)
  power is the rate of doing work
• c)
  both a and b
• d)
  none of these

• a)
  K.E. of them will be equal
• b)
  K.E. of the heavier is 4 times the K.E. of the lighter
• c)
  K.E. of the lighter is 4 times the K.E. of the heavier
• d)
  K.E. of the heavier is more than that of the lighter.

When we throw a rock from the top of a building which equation describes the energy of the body at each point during the fall?

• a)
  A
• b)
  B
• c)
  C
• d)
  D

• a)
  1 km
• b)
  100 m
• c)
  10 m
• d)
  20 m

• a)
  1.8 W
• b)
  5 W
• c)
  180 W
• d)
  20 W

• a)
  Tidal energy      
• b)
  Wave energy      
• c)
  Solar energy      
• d)
  Ocean thermal energy

• a)
  220 J
• b)
  22000 J
• c)
  22 J
• d)
  -2200J

• a)
  >0
• b)
  ≥0
• c)
  <0
• d)
  0

• a)
  Both assertion and reason are true and reason is the correct explanation of assertion.
• b)
  Both assertion and reason are true but reason is not the correct explanation of assertion.
• c)
  Assertion is true but reason is false.
• d)
  Assertion is false but reason is true.

• a)
  Newton
• b)
  Joule
• c)
  Watt
• d)
  Metre per second

• a)
  Both assertion and reason are true and reason is the correct explanation of assertion.
• b)
  Both assertion and reason are true but reason is not the correct explanation of assertion.
• c)
  Assertion is true but reason is false.
• d)
  Assertion is false but reason is true.

• a)
  Both assertion and reason are true and reason is the correct explanation of assertion.
• b)
  Both assertion and reason are true but reason is not the correct explanation of assertion.
• c)
  Assertion is true but reason is false.
• d)
  Assertion is false but reason is true.

• a)
  Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
• b)
  Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
• c)
  Assertion (A) is true but reason (R) is false.
• d)
  Assertion (A) is false but reason (R) is true.

• a)
  A compressed spring
• b)
  Water stored in the reservoir of dam
• c)
  A stretched rubber band
• d)
  A moving car

• a)
  Energy can be created and destroyed.
• b)
  The total energy before and after transformation remains the same.
• c)
  Energy transformation always leads to a loss of energy.
• d)
  Only kinetic energy is conserved, not potential energy.

• a)
  Both assertion and reason are true and reason is the correct explanation of assertion.
• b)
  Both assertion and reason are true but reason is not the correct explanation of assertion.
• c)
  Assertion is true but reason is false.
• d)
  Assertion is false but reason is true.

• a)
  If both Assertion and Reason are true and Reason is the correct explanation of Assertion
• b)
  If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• c)
  If Assertion is true but Reason is false
• d)
  If both Assertion and Reason are false

• a)
  Lower Kinetic Energy
• b)
  Higher Kinetic Energy
• c)
  No Kinetic Energy
• d)
  None of the options

• a)
  Khushi is pushing a wall of a house but fails to do so
• b)
  Pinki is walking on a level road with a book on his head.
• c)
  Shruti is stretching a string.
• d)
  Harsh is reading a book

• a)
  If both Assertion and Reason are true and Reason is the correct explanation of Assertion
• b)
  If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• c)
  If Assertion is true but Reason is false
• d)
  If both Assertion and Reason are false