FORM TWO PHYSICS NECTA MULTIPLE CHOICE 2003

THE UNITED REPUBLIC OF TANZANIA MINISTRY OF EDUCATION AND CULTURE

FORM TWO SECONDARY EDUCATION EXAMINATIONS, 2003

0031 PHYSICS

TIME: 2 HOURS

INSTRUCTIONS

1. This paper consists of sections A, B and C.

2. Answer ALL questions in ALL sections.

3. Section C should be answered on separate sheets of paper provided. In your calculations you are required to show clearly all the steps of your work in a systematic manner.

4. Whenever necessary use the following constants:

Density of water = 1 g/cmAcceleration due to gravity g = 10 m/s3 or 1000 kg/m2 3

S.T.P. means T = 273 K, P = 760 mmHg.

The specific heat capacity of water = 4200 J/kgK

5. Cell phones are not allowed in the examination room.

This paper consists of 8 printed pages.

SECTION A (20 MARKS)

1. This section consists of twenty (20) multiple choice questions. Answer ALL questions in this section by writing the letter of the correct answer in the box provided:

(i) The shortest length which can be measured by a metre rule is:

1. 0.1 mm
2. 1.0 mm
3. 10 mm
4. 100 mm

(ii) Which of the following is a unit of force:

1. Kg m/s
2. Kg ms
3. Kg m/s2
4. Kg ms2

(iii) The meniscus of mercury in a glass vessel curves upwards because:

1. The cohesion of molecules of mercury is stronger than the adhesion of molecules of glass and mercury
2. The adhesion of molecules of mercury is stronger than the cohesion of molecules of mercury.
3. Mercury experiences a downward force equal to its weight.
4. Mercury is denser than glass.

(iv) The minimum pressure exerted by a rectangular wooden block of 1 kg measuring 4 m x 3 m x 2 m on the bench is:

1. 0.17 Pascals
2. 1.25 Pascals
3. 1.67 Pascals
4. 0.83 Pascals

(v) The normal body temperature of human beings is:

1. 13.8°F
2. 66.4°F
3. 98.4°F
4. 38°F

(vi) The image formed by a plane mirror is always:

1. Smaller than the object
2. Virtual
3. Larger than the object
4. Real

(vii) The process of removing magnetism from a given material is called:

1. Magnetization
2. Induction method
3. Demagnetization
4. Electrification

(viii) A body which gains excess electrons becomes:

1. Negatively charged
2. Positively charged
3. Electrified
4. Both A and B are correct

(ix) A potential difference of 24 volts is applied across a resistor of resistance 12 ohms. The current flowing in the circuit is:

1. 0.5 A
2. 1.5 A
3. 2.0 A
4. 2.5 A

(x) Which of the following is not a form of energy:

1. Light
2. Friction
3. Magnetism
4. Electrons

(xi) The efficiency of a machine is defined as:

1. (Work done in load) / (Work done by effort)
2. (Mechanical Advantage) / (Velocity ratio)
3. (Velocity ratio) / (Mechanical Advantage)
4. (Work done by effort) / (Work done by load)

(xii) A person in a bus which starts to move forward tends to fall backwards. This is because he/she is obeying:

1. The Principle of moment
2. Newton’s third law of motion
3. Newton’s second law of motion
4. Newton’s first law of motion.

(xiii) Steam at 100°C has more burning effect than water at 100°C because:

1. The latent heat of vaporization is higher than the specific heat capacity of water at 100°C
2. Steam is less dense than water.
3. The molecules of water in steam have more kinetic energy than those of water at 100°C.
4. Steam is at a higher temperature than water at 100°C.

(xiv) The ratio of the density of the substance to the density of water is:

1. Mass per unit volume
2. Relative density
3. Upthrust
4. Density of a substance.

(xv) When a body floats in water:

1. It displaces its own volume of water.
2. The mass of the water displaced by the body is equal to its own mass
3. It weighs the same as in air
4. The downthrust is more than the upthrust.

(xvi) The surface tension of liquid is due to:

1. Molecules on its surface.
2. Elastic skin which covers the surface of the liquid.
3. Cohesive forces between its surface molecules.
4. Adhesive force between different molecules.

(xvii) Solids expand when heated because:

1. The molecules expand.
2. Increased molecular motion pushes the molecules further apart.
3. Heat takes up space between the molecule.
4. The molecules soften and begin to flow.

(xviii) For a rigid body, there is one point at which the resultant force appears to act. This point is known as:

1. Neutral point
2. Balancing point
3. Centre of gravity
4. Central position of a body.

(xix) The area under the velocity­-time graph for a uniformly accelerated motion of a body represents:

1. Acceleration of a body
2. Retardation of a body
3. Distance travelled by a body
4. None of the above.

(xx) If one cell in a three torch cell is placed in the opposite direction:

1. The torch will not give light
2. The torch will give very bright light
3. The torch will give very dim light
4. The torch will give normal light.