Time Allowed: 15 Min. (Objective) + 1.45 Hours (Subjective)
Max. Marks: 60 (12 Objective + 48 Subjective)
Objective Type Questions (Max. Marks: 12)
Note: Four possible answers A, B, C and D to each question are given. The choice which you think is correct, fill that circle in front of that question with marker or pen ink in the answer-book. Cutting or filling two or more circles will result in zero mark in that question.
(i) One femtometre is equal to:
(a) \(10^{-9}m\)
(b) \(10^{-15}m\)
(c) \(10^{9}m\)
(d) None of these
(ii) The area under the speed-time graph is numerically equal to:
(a) Velocity
(b) Uniform velocity
(c) Acceleration
(d) Distance covered
(iii) The unit of gravitational field intensity is:
(a) \(kg \, m \, s^{-1}\)
(b) \(kg \, m^{2} \, s^{-1}\)
(c) \(N \, m^{2}\)
(d) \(N \, kg^{-1}\)
(iv) A particle of mass m is moving with a velocity v collides with another particle of the same mass at rest. The velocity of the first particle after collision is:
(a) v
(b) -v
(c) 0
(d) \(-1/2\)
(v) A force F is making an angle of \(60^\circ\) with x-axis. Its y-component is equal to:
(a) F
(b) \(F \sin 60^\circ\)
(c) \(F \cos 60^\circ\)
(d) \(F \tan 60^\circ\)
(vi) By increasing the magnitude of force, moment of force will:
(a) decrease
(b) increase
(c) be doubled
(d) remain the same
(vii) A bullet of mass \(0.05 \, kg\) has a speed of \(300 \, ms^{-1}\). Its kinetic energy will be:
(a) \(2250 \, J\)
(b) \(4500 \, J\)
(c) \(1500 \, J\)
(d) \(1125 \, J\)
(viii) The principle of a hydraulic press is based on:
(a) Hooke's law
(b) Pascal's law
(c) Principle of conservation of energy
(d) Principle of conservation of momentum
(ix) Atmospheric pressure extends up to a height of about:
(a) \(10 \, km\)
(b) \(100 \, km\)
(c) \(1,000 \, km\)
(d) \(10,000 \, km\)
(x) In kelvin scale, the temperature corresponding to melting point of ice is:
(a) Zero
(b) 32
(c) -273
(d) +273
(xi) A common method used to magnetise a material is:
(a) stroking
(b) hitting
(c) heating
(d) placing inside a solenoid having A.C.
(xii) Which branch of science plays vital role in technology and engineering?
(a) Biology
(b) Chemistry
(c) Geology
(d) Physics
Subjective Type Questions (Max. Marks: 48)
2. Part-I (Short Questions)
Note: Attempt any FIVE (05) questions. Each question carries 2 marks. (Total 10 Marks)
(i) What is measurement? Name its two parts.
(ii) Write the name of 3 base quantities and 3 derived quantities?
(iii) Why a standard unit is needed to measure a quantity correctly.
(iv) Differentiate between scalar and vector quantities.
(v) What are distance-time graph?
(vi) What kind of changes can a force bring in a body in motion?
(vii) State Newton's 2nd law of motion and define the unit of force.
(viii) When someone jumps from a small boat onto the river bank, why does the boat move away from the shore? Explain.
3. Part-II (Short Questions)
Note: Attempt any FIVE (05) questions. Each question carries 2 marks. (Total 10 Marks)
(i) What are rectangular components of a vector and their values?
(ii) Give an example of the body which is moving but it is yet in equilibrium.
(iii) Define neutral equilibrium and give its two examples.
(iv) A slow-moving car may have more kinetic energy than a fast-moving motorcycle. How is this possible?
(v) Differentiate between kinetic energy and potential energy.
(vi) A man rowing boat upstream is at rest to the shore. Is he doing work?
(vii) Distinguish between force and pressure.
(viii) State the basic principle used in the hydraulic brake system of the automobile.
4. Part-III (Short Questions)
Note: Attempt any FIVE (05) questions. Each question carries 2 marks. (Total 10 Marks)
(i) State the main scales used for the measurement of temperature.
(ii) What does determine the direction of heat flow?
(iii) What is a thermometer? Enlist some uses.
(iv) Define magnetic field of a magnet.
(v) Name some uses of permanent magnets and electromagnets.
(vi) Write any two properties of magnetic lines of force.
(vii) List any three applications of electricity in our daily life.
(viii) Differentiate between a theory and a law of Physics?
Part-IV (Long Questions)
Note: Attempt any TWO (02) questions. Each question carries 9 marks (4+5). (Total 18 Marks)
5. (a) Define momentum and express Newton's 2nd law of motion in terms of change in momentum. (4)
(b) A ball is dropped from the top of a tower. The ball reaches the ground in \(5 \, s\). Find the height of the tower and the velocity of the ball with which it strikes the ground. (5)
6. (a) State the law of conservation of energy. Explain it with the help of an example of a body falling from certain height in terms of its potential energy and kinetic energy. (4)
(b) Calculate the pressure of column of mercury \(76 \, cm\) high. Density of mercury is \(13.6 \times 10^3 \, kg \, m^{-3}\). (5)
7. (a) What is a circuit breaker? Describe its working with the help of a diagram. (4)
(b) The temperature of a normal human body on Fahrenheit scale is \(98.6^\circ F\). Convert it into Celsius scale and Kelvin scale. (5)