Fsc Physics Mcqs Chapter wise with Key

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Sample Paper

Physics     Chapter No. 1 to 4  

The most basic branches of physics are

(a) Mechanics and field theory (b) Heat and thermodynamics

(c)biophysics  (d) Ballistics and statics

The fundamental quantities which form the base for the MKS system are

(a) mass, energy and time (b)mass, force and time

(c)mass, length and time  (d) force, length and time

 Light year is a unit of

(a) light                 (b) time                      

(c) velocity           (d) distance

The SI units of angular velocity are

(a) ms^-1                  (b) rads^-1                      

 (c) cm s^-1              (d) cms^-2

One atto is equal to

(a) 10^-18              (b) 10^-15                                  

(c)10¹⁸               (d) 10^-12

 Significant figures in 0.000846 are

(a) six                    (b) four                        

(c) three                 (d) two

If a force of 10N makes an angle of 30^o with x-axis, it y – component is given by

(a) 8.66 N              (b) 0N                           

(c) .776N               (d) 5N

Laws of motion are not valid in a system which is

(a) moving with uniform velocity            (b) at rest

(c) isolated                                                (d) non – inertial

The trajectory (or path) of a projectile is

(a) Straight line      (b) Parabola                 

(c) Hyperbola        (d) Circle

Before launch of any rocket the mass of the fuel rocket is approximately consists of

(a) 60% of rocket mass                             (b)  40 % of rocket mass

(c) 80% of rocket mass                             (d)  50% of rocket mass

Absolute potential energy of a body of mass ‘m’ at a distance ‘r’ from the centre of earth

(a)  - GM/r²           (b) – GmM/r              

(c) – Gm/r²            (d) – Gm/r

The dimensions of impulse are the same as that of

(a) Energy              (b) Work                    

 (c) Power              (d) Momentum

A body at rest may have

(a) Speed               (b) velocity                  

(c) momentum       (d) Energy

1 kwh is equal to

(a)  3.6 x 10⁶J        (b) 36 x 10⁵J               
(c) 3.6 MJ              (d) All of these

Hot igneous rocks have a temperature of about

(a) 100^oC               (b) 200^oC                   

 (c) 300^oC              (d) 250^oC

One kilowatt hour of work is always equal to

(a)36 MJ               (b)3.6 MJ                               

(c)36.0 MJ            (d) 360 MJ 

 Attempt any twenty two Short Questions.

1. Name several repetitive phenomenon occurring in nature which could serves as reasonable time standards.
2. Give the drawbacks to use the period of a pendulum as a time standard.
3. Why do we find it useful to have two units for the amount of substance, the kilogram and the mole?
4. Does a dimensional analysis give any information on constant of proportional that may appear in an algebraic expression? Explain.
5. Show that the expression  + at is dimensionally correct, where vi is the velocity at t = 0, a is acceleration and vf is the velocity at time t.
6. Show that the famous “Einstein equation” E = mc2 is dimensionally consistent.
7. Define the terms (i) unit vector (ii) Position vector and (iii) Components of a vector.
8. If all the components of the vectors, A1andA2 were reversed, how would this alter A1XA2?
9. What is the difference between uniform and variable velocity. From the explanation of variable velocity, define acceleration. Give SI units of velocity and acceleration.
10. Can the velocity of an object reverse the direction when acceleration is constant? If so, give an example.
11. At what point or points in its path does a projectile have its minimum speed, its maximum speed?
12. Calculate the work done in kilo joules in lifting a mass of 10 kg (at a steady velocity) through a vertical height of 10m.
13. A girl drops a cup from a certain height, which breaks into pieces. What energy changes are involved?
14. Write the dimensions of (i)Pressure (ii) Density
15. Name the three different conditions that could make 
16. Define impulse and show that how it is related to linear momentum?
17. What sort of energy is in the following (i) compressed spring (ii) Water in a high dam (iii) A moving car 

Attempt any three Questions.                                                                           

Q.1      (a) Discuss addition of vectors by rectangular component method for two vectors and n-vectors.

Q.2      (a) Define projectile and projectile motion. Calculate (i) Velocity (ii) Height (iii) Range of projectile?

            (b) A foot ball is thrown upward with an angle of 30^o with respect to the horizontal. To throw a 40m pass what must be the initial speed of the ball?

Q.3      (a) Define energy K.E. and P.E. Explain Work – Energy Principle?

            (b) A force (thrust) of 400 N is required to overcome road friction and air resistance in propelling an automobile at 80 kmh^-1. What power (kW) must the engine develop?

Q.4      (a) Define the followings

(i) Significant figures (ii) Systematic error (iii) Steradian (iv) Meter

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Physics Part 1 and 2 MCQs  chapter wise with key

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