1. The working of the Quartz Crystal in the Watch is based on the ------- ?

(a) Photo Electric Cell
(b) Johnson Effect
(c) Piezo - Electric Effect
(d) Edison Effect

2. How many colours The Sunlight spectrum has ?

(a) Five
(b) Three
(c) Seven
(d) Four

3. 'Bar' is the unit of ------ ?

(a) Heat
(b) Temperature
(c) Current
(d) Atmospheric Pressure

4. The unit of measuring Pitch or the Frequency of Sound ?

(a) Columb
(b) Hum
(c) Decibel
(d) Hertz

5. Red - Green colour blindness in human is known as ?

(a) Protanopia
(b) Deuteranopia
(c) Both A & B
(d) Marfan's Syndrome