Match the following:
Column A. Column B
a.Heat energy. 1.Electric motor

b.Sound Energy 2.Electric bells

c.Magnetic Energy 3. Radio

d.Light energy. 4. Electric Iron

e. Mechanical Energy 5.Bulb

Q. Match the following :

Radio isotope	Cures disease
i) Radio sodium	a) Thyroid gland
ii) Radio phosphorus	b) Cancer
iii) Radio cobalt circulation	c) Blocks in blood
iv) Radio iodine	d) Leukamia

Q. Consider the following sentences.
$1$. In ordinary bulbs only $5\%$ to $10\%$ electrical energy is converted into light energy.
$2$. Tungsten has very high melting point as ${3422}^o$C, the filament of bulb is made of it.
$3$. Mica has good electrical resistance.
$4$. The electric bulb was first invented by Thomas Alva Edison.
Which of the statements are correct?

Q. Pick out the pair in which the energy change of one is reverse of the energy change in the other :
(1) radio (2) fluorescent lamp (3) toaster (4) photoelectric cell

Q. Assertion :Radio waves are diffracted by buildings. Reason: Radio waves are high energy waves.

Q.

Which of the following energy conversions take place when a bulb glows?