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Q1— Section header —
1.1Indicate whether the following statements are TRUE or FALSE by writing only rue or alse next to the question num ber
1.2.10\ in the ANSWER BOOK.
1.1.1Stress is the intensity of external force acting a point in an object.
1.1.2Osmosis is diffusion tak ing place in two directions.
1.1.3Reflection of a ray of light is the amount of refraction , the ray undergo es differs from one optical medium to another.
1.1.4The speed of sound in open tube can be calculated by v = 2 fl.
1.1.5Boyle's law state that t he product of the absol ute p ressure and the volume of a gas of a closed system
1.2Define each of the fo llowing
1.2.1Stefan Boltzman s law (3\
1.2.2Far sighted (3\
1.2.3Strain (2\
1.2.4Magnetic flux density (3\
1.2.5Transverse wave (2\
1.3Name ONE use of each of the following
1.3.1Air thermometer
1.3.2
1.4Provide a suitable example of each of the following statements
1.4.1bject that seldom produce pure tone and overtones
1.4.2Semi permeable membrane
1.4.325
2.1Differentiate between cohesive and adhesive force (4\
2.2In what way is the amount of heat energy radiated by the body influenced by each of the following?
2.2.1Temperature
2.2.2Colour
2.2.3Texture
2.2.4
2.3Briefly explain what will happen during image formation through lenses when the object is at the radius of the curvature (4\
2.4During an experiment to investigate Charles s law the following results were obtained: Volume in m Temperature in K
2.4.1Find the possible values of A and B. (2\
2.4.2Give Charles s law in word (3\
2.4.3Draw a graph that best describe Charles s law. (3\
2.5A string is 6 m long and has a mass of 9 g. One end of the string hangs over a drum and is fastened to a copper mass of 18 g. The density of the copper is 8500 g/m Calculate each of the
2.5.1ension exerted on the string (1\
2.5.3elocity of the sound transmission along the string (2\
2.5.325
3.1An object is placed at a distance of 400 mm from a concave mirro r with a focal length of 150 m. Determine each of the following
3.1.1Position of the image (2\
3.1.2Nature of the image (2\
3.1.3ize of image formed if height of object is 50 mm (3\
3.2g is a by product of a waste water purification plant. The gas has a volume of 0 0065 m
3.2.1constant (3\
3.2.2hange in internal energy (5\
3.3.3ork done by gas while expanding (3\
3.3Draw a neatly labelled structure of the human eye (7\ [25] QUESTION25
4.1A circular disc has 30 small evenly spaced holes. A jet of air is blown ov the holes into a closed pipe 200 mm long. Given: The velocity of sound at room temperature is 345 m/s. Calculate the speed in r/min
4.2
4.4Given H= Give the meaning of each symbol in the formula (6\
4.5Calc ulate the illumination intensity of a light of 80 cd at a point 500 mm away the normal to the surface forms an angle of 40 with the light rays (2\
4.6Determine the surface tension of a soap solution at 20 that requires force of 0.025 N to hold wire frame 230 mm wide in equilibrium (2\
4.7Calculate the gas constan t (R\f of a gas has a volume of
0.025 m at a pressure of 4 bar and a temperature of 95 (3\ [25] TOTAL:25