Get premium membership and access revision papers, questions with answers as well as video lessons.

232/1 Physics Question Paper

232/1 Physics

Course:Physics

Institution: Form 4 Mock question papers

Exam Year:2010

Name……………………………………………………………. Index No……………………………..
School…………………………………………………………… Candidate’s sign…………………….
Date………………………………….

232/1
PHYSICS
Paper 1
JULY/AUGUST 2010
2 Hours

BUTERE DISTRICT JOINT EVALUATION TEST – 2010
Kenya Certificate of Secondary Education (K.C.S.E)

232/1
PHYSICS
Paper 1
JULY/AUGUST 2010
2 Hours

INSTRUCTIONS TO CANDIDATES
1. Write your name and index number in the spaces provided above
2. Sign and write the date of examination in the spaces provided above
3. This paper consists of two sections: A and B
4. Answer all the questions in section A and B in the spaces provided
5. All working must be clearly shown
6. Mathematical tables and silent electronic calculators may be used.

Take g = 10Nkg-1

FOR EXAMINER’S USE ONLY
SECTION MAXIMUM SCORE CANDIDATES SCORE
A 1 – 11 25
B 12 12
13 12
14 11
15 10
16 11
TOTAL SCORE 80

This paper consists of 12 printed pages. Candidates should check the question paper to
Ensure that all the pages are printed as indicated and no questions are missing.
SECTION A (25 MARKS)
Answer ALL the questions in this section in the spaces provided
1. A body weighing l00N in air is found to weigh 80N when fully immersed in a certain fluid. Account for the difference in the two weights? (1mk)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….……………………………………………………………………………………………………….

2. State how the pressure of a fixed mass of gas can be increased at constant temperature. (1mk)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….

3. The figure below shows a U – tube containing two liquids L1 and L2 of densities 0.5g/cm3 and 0.8g/cm3 respectively floating on a water surface. If the system is in equilibrium, determine the ratio h1: h2 (3mks)

……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….

4. A uniform metre rule pivoted at its 15cm mark is balanced by a 200 g mass suspended at the 5 cm mark. Determine the weight of the metre rule. (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….
5. The Figure below shows a pith ball at the bottom of a bottle container.

State and explain what would happen if air is blown over the mouth of the container. (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….

6. Sketch a density – temperature graph for water being heated from 0oC to 10oC on the axes provided. (1mk)

7. Sketch a section of a vernier calipers showing a reading of 2.33 cm. (2mks)

8. Two identical helical springs are connected in series. When a 50g mass is hang at the end of the springs, it produces an extension of 2.5 cm. Determine the extension produced by the same mass when the springs arc connected in parallel. (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….……………………………………………………………………………………………………….

9. A body of mass m kg moves uniformly around a circle or radius r m with a linear velocity v m/s. Derive an expression for the relationship between its linear velocity v and angular velocity ?.
(3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….……………………………………………………………………………………………………….

10. State three assumptions made when determining the diameter of an oil molecule in the oil drop experiment (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….

11. A faulty mercury thermometer reads 40oC and 120oC when placed in pure melting ice and steam from boiling water respectively. Determine the actual temperature when this thermometer reads 50oC. (2mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….

SECTION B (55 MARKS)
Answer ALL questions in this section in the paces provided on the question paper.
12. (a) Differentiate between heat capacity and Specific heat capacity of a substance (1mk)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….

(b) Briefly describe an experiment to determine the specific heat capacity of a liquid substance using the electrical method. (6mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….

(c) An immersion heater rated 1000W is used to heat a block of ice of mass 500g initially at -10°C until the all the water evaporates at 95°C. Assuming that all the heat supplied is used to heat the ice, calculate the time in minutes for the whole process to take place. (Take specific heat capacity of water as 4200J/KgK, specfic heat capacity of ice = 2100J/KgK specific latent heat of fusion = 3.35 x 105 J/Kg and specific latent heat of vapourization 2.26 x 105J/Kg) (5mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
13. (a) A mountain climber with a mercury barometer discovered that the readings of the barometer at the bottom and top of a certain mountain were 750mmHg and 520mmHg respectively. Given that the density of air between the bottom and top of the mountain is uniform and equal to 1.25 Kg/m3, estimate the height of the mountain. (Take the density of mercury to be 1.36 x 104 Kg/m3) (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….……………………………………………………………………………………………………….……………………………………………………………………………………………………….

(b) (i) State Newton’s second law of motion (1mk)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….

(ii) A driver driving a car of mass 1200 Kg at a constant speed of 72Km/hr is flagged down by a traffic police officer. It takes him 2 seconds to react to the police signal and brings the car to rest by applying a constant breaking force in 10 seconds. Determine the minimum stopping distance and the constant breaking force. (5mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
(c) Water flows through a pipe with varying cross sectional area. The narrower section has an area of 5cm2 while the wider section has an area of 15cm3. If the velocity of the water trough the narrow section is 20m/s, determine the velocity in the wider section. (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….

14. (a) State the pressure law (1mk)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….

(b) The diagram below shows a set up that a student used to investigate the pressure law.

(i) State the measurements that should be taken in the experiment (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….
(ii) Explain how the measurement in (i) above may be used to verify Pressure law (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….

(iii) Name one limitation of the gas laws. (1mk)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
(iv) Hydrogen gas of volume 2400cm3 at 54°C and pressure of 2.4N/m2 is compressed until its volume is 300cm3 at a pressure is 6 N/m2. Determine the temperature of the gas after this compression. (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….

15. (a) State Archimedes Principle (1mk)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….

(b) The figure below shows a block of mass 50g and density 2000kg/m3 submerged in a certain liquid and suspended from uniform horizontal beam by means of a string. A mass of 40g suspended from the other end of the beam puts the system in equilibrium.

(i) Determine the upthrust force acting on the block. (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
(ii) Calculate the density of the liquid (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….

(iii) Calculate the new balance point of the 50 g mass (the 40g mass remains fixed) if the liquid was replaced with one whose density was 1500Kg/m3 (3mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….

16 (a) Define the term velocity ratio as applied to machines (1mk)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….

(b) The table below shows the results obtained in an experiment to determine the performance of a single string pulley system with a velocity ratio of five.

Load (N) 50 100 200 300 400 500 600
Effort (N) 30 45 65 85 105 125 145

(i) Plot a graph of load against effort (5mks)

(ii) Use your graph to determine the mechanical advantage and efficiency corresponding to a load of 450 N (4mks)
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….
……………………………………………………………………………………………………….……………………………………………………………………………………………………….

232/1 Physics Question Paper

More Question Papers

Popular Exams