Calendar: 1881-1882 Page 660

applied sciences 661 for the effect which is produced when the coil is rotated through two right angles Explain in what way such coil may be made use of to determine the magnetic dip Explain method of comparing the strength of magnetic pole of magnet with the horizontal magnetic force of the earth Explain the principle and point out the advantages of Helmholtz's double tangent galvanometer Describe method of determining the electrical resistance of galvanometer What is meant by magnetic field State the laws of the effects due to the motion of magnet in the neighbour- hood of wire of which the two ends are joined Explain the effect produced wheal magnet with its south pole in front is passed straight along the axis through coil of wire FIRST YEAR Determine the pressure in grammes on each face of circular area of 10 centimetres radius immersed in alcohol of density 791 the centre of the circle being at depth of centimetres neglecting atmospheric pressure taking atmospheric pressure into consideration and assuming that the mercury in the barometer is 76 centimetres high Describe the construction of the common cistern barometer and state the various precautions necessary to be employed in order to obtain correct measure of the atmospheric pressure per square centimetre Describe some form of double-acting air-pump If the receiver has double the volume of the barrel find the density of the air remaining after 10 strokes What will be the weights in air and in water of an iron wire 1000 centimetres long and millimetre in diameter its density being 77 Describe the construction of the common thermometer and explain the various precautions which should be taken in order to secure an accurate instrument and the variousmodes of graduating