A solid metal cube has each side doubled to make a solid cube of the same metal eight times bigger in volume. The ration of resistivity of the new cube to resistivity of the old cube is

In a cloud chamber, straight-line trails of vapour are produced by a source emitting

Match the times in List A with reponses in List B by writing the letter of the correct response beside the item number in the answer booklet provided. List A (i) Mass of water vapour which is actually present in a unit volume of air at constant temperature (ii) Rate at which a material transfers heat energy (iii) Measurement of the amount of moisture present in the atmosphere. (iv) Mass of water vapour present in a unit volume of air. (v) Difference between readings of the two thermometers. (vi) A measure of the extent to which the atmosphere contains water vapour. (vii) It can be found by the method of mixture or electrical heating. (viii) Amount of heat energy required to change the state of a substance. (ix) Measures temperature of inaccessible structures. (x) Depends on the electrical properties of materials varying with temperature.

Boresha ili kuona majibu ya mfano.

For each of the items (i)-(x), fill in the blank spaces by writing the correct answer in the answer booklet provided. (i) The presence of electric charge in a body can be detected by means of . (ii) The automatic flushing tank uses the working principle of . (iii) The simple a.c. generator works on the converse principle of . (iv) The element that is heaviest of all natural elements is called . (v) The defects of an image formed by a single lens is called . (vi) Most stars in the universe which are visible in the night sky are within our own . (vii) A part of the Earth’s mantle and crust containing liquids, crystals and dissolved gases is known as . (viii) A p-type semiconductor is formed when silicon is replaced by . (ix) The electric current can pass through an electric component due to the existence of . (x) The physical state of a substance normally depends on .

Boresha ili kuona majibu ya mfano.

Answer all questions in this section.

Boresha ili kuona majibu ya mfano.

Answer all questions in this section.

Boresha ili kuona majibu ya mfano.

Answer all questions in this section.

Boresha ili kuona majibu ya mfano.

Answer all questions in this section.

Boresha ili kuona majibu ya mfano.

Figure 2 shows a section of a cathode-ray oscilloscope. Figure 2 What changes should be done in order to produce the following on the screen:

Boresha ili kuona majibu ya mfano.

Boresha ili kuona majibu ya mfano.