Test Details

Work, Energy and Power

Mar 15, 10:20 AM

40 minutes

Mar 15, 11:00 AM

20.0 marks

MCQ

15 questions

Er R E Khan

Er R E Khan Ex fellow GNA Udyog ltd Maruti Suzuki India ltd 10 years teaching Experience.

Class Details

Electrostatic

Physics@AOP12th

Electrostatic

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Question Text

Question 1 :
An object of mass 1kg has a PE of 1J relative to the ground when it is at a height of:

Question 2 :
A ball tied at the end of a string and swinging back and forth, at what point in the swing would the ball have the highest potential energy?

Question 3 :
Two bodies of equal weight are kept at heights of $h$ and $1.5 h$ respectively. The ratio of their P.E. is:

Question 4 :
Name the type of energy (kinetic energy $K$ or potential energy $U$) possessed in a compressed spring:

Question 5 :
A ball of mass $m$ is thrown vertically up with an initial velocity so as to reach a height $h$. The correct statement is:

Question 7 :
A body of weight 1 newton has a potential energy of 1 joule relative to the ground when it is at a height of:

Question 9 :
A body is dropped from a certain height from the ground. When it is halfway down, it possess,

Question 10 :
Simple pendulum of length l has a maximum angular displacement $\theta$. The maximum kinetic energy of the bob is?

Question 11 :
A woman weighing $63$kg eats plum cake whose energy content is $9800$ calories. If all this energy could be utilized by her, she can ascend a height of

Question 12 :
Human heart pumps $70\ cc$ of blood at each beat against a pressure of $125\ mm$ of $Hg$. If the pulse frequency is $72$ per minute, the power of the heat is nearly.

Question 13 :
A truck weighing $1000 \ kgf$ changes its speed from $36 \ kmh^{-1}$  to $72 \ kmh^{-1}$ in $2$ minutes.$(g = 10 \ ms^{-2})$. Calculate the work done by the engine

Question 14 :
If gravitational potential at a plane is $V=(5x^{2}-3x^{3}+5)$ Joule/kg then find gravitational field intensity at $x=1 m$:

Question 15 :
A boy weighing $25kgf$ climbs up from the first floor at height $3m$ above the  ground to the third floor at height $9m$ above the ground. What will be the increase in the gravitational potential energy? Consider $g=10ms^{-2}$.

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