Physics
 Define Unit vector.
 Differentiate between average velocity and instantaneous velocity.
 State the laws
 Law of conservation of linear momentum
(II) Law of conservation of electric charge.
4.Name the basic and supplementary unit ofphysical quanties inSI.
5.Write the dimensional formulae for
(i) Force (ii) Torque (iii) Angle (iv)Momentum (v) Coefficient of viscosity
6.Check the correctness of a relation
F=mv^{2}/r
7.Derive by method of dimensions, an expression for the time period(t) of oscillation of the simple pendulum, assuming that this time period depends upon
(i) Length of pendulum (L)
(ii) Acceleration due to gravity (g).
8. What do you mean by error in the measurement of a physical quantity? Explain
(i) Systematic error (ii) Random error.
9. The period of oscillation of simple pendulum in an experiment is recorded as 2.63 s , 2.56 s , 2.42 s , 2.71 s and 2.80 s respectively. Find the time period, absolute error in each observation, mean absolute error and percentage error.
10. What is parallax? Discuss parallax method for determination the distance of a nearbystar.
11.What do you mean by Vector and Scalar quantities? Identify the vector and Scalar quantities from the following
(i) Force (ii) Temperature (iii) Power (iv) Momentum.
12. (i) Using vt Graph for uniformly accelerated motion of a particle or body, derive the relation for velocity and displacement
(ii) A bus at rest accelerates uniformly to a velocity of 54 km/h in 20 sec. How much distance is travelled by the bus in 20 Sec?
13. What do you mean by relative velocity of body A with respect to body B. Derive expression for it. Discuss special cases.
14. State and prove triangle law of vectors. Discuss the special cases.
15. State and prove polygon law of vectors addition.
16. Numericals related to topics.
