Question

5
24
were should be a provision of one electric bulb, one electric fan, a refrigerator and a
Prug point for appliances of power up to 2 kilowatt. Draw a circuit diagram showing
electric fuse and earthing as safety devices.
in the figure given below, a narrow beam of white light is shown to pass through a
triangular glass prism. After passing through the prism, it produces a spectrum XY on the
screen.
3
(i) Name the phenomenon.
(ii) State the colours seen at X and Y.
(iii) Why do different colours of white light bend at different angles through a prism?
OR
(1) What is visible spectrum?
(ii) Why is red used as the stopping light at traffic signals?
(111)Two triangular glass prisms are kept together connected through their rectangular
side. A light beam is passed through one side of the combination. Will there be any
dispersion? Justify your answer.
SECTION C
5
25
Metal X is found in nature as its sulphide XS. It is used in the galvanisation of iron
articles. Identify the metal X. How will you convert this sulphide ore into the metal?
Explain with equations.​

Answer 1

Answer:

In house hold supply is 2phase we do not use fuse in household rather

we use breakers now as a safety device. earthing pit is separate than the other wiring. earthing wire is connected with the body of the equipment.

all the devices like bulb, fan and socket for refrigerator will be connected to one of the socket.

household devices are connected in parallel because in parallel voltage does not divide