PPSC Physics Full Book With Answers

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PPSC Physics Full Book

Sr. # Questions Answers Choice
1 Original source of biomass is. Stars Moon earth Sun
2 When a body is taken out of the earth's gravitational field, the P.E. with respect to earth is Zero Minimum Maximum geothermal
3 Absolute P.E. of a body can be calculated At centre of the earth Below centre of the earth From surface of the earth Below surface of the earth
4 While passing through the atmosphere total energy is reduced due to. scattering Absorption Reflection All of these
5 Conservation of energy means that Energy can be destroyed but not created Energy can be created but not destroyed energy cannot be created and destroyed Energy can neither be created nor destroyed
6 Which of the following type of force can do no work on the particle on which it operates. Gravitational force Frictional force Centripetal force Elastic force
7 Which of the following is non renewable source of energy. Wind Coal Hydroelectric Biomass
8 Which of the following is renewable source of energy. Oil Natural gas Uranium Sunlight
9 A ball mass 0.25 kg is thrown to a height of 20 m The change in G.P.E is 49 J 50 J -75 J 500 J
10 A 100 kg box is pulled 10 m across a frictionless horizontal surface by a 50 N force The change in the P.E. of the box a 0 J 2 J 20 J 50 J
11 A girl weighing 400 N takes 4 s to run up the stairs How much P.E. does she gain if height of the stairs is 3 m. 120 J 400 J 200 J 1200 J
12 A mason of 9.8 N weight is climbing on a 20 m high ladder The P.E. of mason at the middle of ladder is. 98 J 196 J 960.4 J 980 J
13 Which of the following is an example of negative work. a thrown up cricket ball Grass mower A car on road Bucket in the well
14 Solar cells are thin sand whishes of good conductors Bad conductors Semi conductor Insulators
15 Which of the following is a non conservative force. Gravitational force Air resistance Elastic force Tension in a string
16 Which of the following is a conserfative force. Electric force Frictional force Normal force propulsion force of a rocket
17 The field in which the work done is independent of the path followed. Conservative field Electric field Magnetic field Non conservative field
18 The hydrogen filled balloon possesses P.E K.E Heat energy Elastic energy
19 The source of geothermal energy is The fusion in the sun the radioactive decay in the earths interior the rotation of earth around the sun The rotation of earth around its own axis
20 The work required to lift a ball of mass 'm' from the surface of the earth to an infinite distance is Absolute P.E. of the body P.E of the body K.E. of the body Chemical energy of the body
21 When an arrow is shot from a bow, it has K.E. which is given to it by The elongated tail The stretched string of bow The throw of archer The sharp arrows head
22 A bus and a car moving with the same K.E. are acted upon by the same retarding force then the car will stop first Bus will stop first Both will stop simultaneously Both will never stop
23 A mason of 9.8 N weight is climbing on a 20 m high ladder The P.E. of mason at the middle of the ladder is. 98 J 196 J 960 .4 J 1920 .8 J
24 When a person holding a pall is moving in the forward direction, the work done on the pall is Positive Negative Zero Equal to gravity
25 The work done in moving a body from one place to another in a gravitational field is independent of the applied force Force of gravity Path followed by the body Force of earth
26 A neutron is in head on elastic collision with a stationary nitrogen nucleus The mass of nitrogen nucleus is 14 times that of a neutron The neutrons velocity after the collision is. Less in magnitude than its intimal velocity Less in magnitude than the final velocity of the nitrogen atom Equal in magnitude to its initial velocity but in the opposite direction Greater in magnitude than its initial velocity
27 when a bowl of water is take into the bottom of a well the work done is. Positive Negative Zero Maximum
28 The value of 'g' is affected by earth's Non spherical shape Daily motion Volume Density
29 When a body is lifted through a height 'h' the work done on the body appears in the form of. K.E P.E Heat Density
30 An object falls freely under gravity the vertical equilibrium of the body inside is Stable Unstable Neutral Unknown
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