The operation of solar cell is based on:
- (A)Â Laser technology
- (B)Â Photoconduction
- (C)Â Thermal emission
- (D)Â Tyndall effect
- (B)Â Photoconduction
The minimum number of bits required to store hexadecimal number AF is:
- (A)Â 2
- (B)Â 4
- (C)Â 8
- (D)Â 16
- (C)Â 8
Which of the following minerals is most resistant to chemical weathering:
- (A)Â Olivine
- (B)Â Quartz
- (C)Â Hornblende
- (D)Â Potassium feldspar
- (B)Â Quartz
An igneous rock contains a radioactive isotope that has a half-life of 10 million years. Careful analysis shows that only one quarter of the original concentration of the parent isotope is left. How old is this igneous rock?
- (A)Â 10 Million years
- (B)Â 20 Million years
- (C)Â 30 Million years
- (D)Â 40 Million years
- (D)Â 40 Million years
The discipline which deals with the understanding and treatment of mental health is called:
- (A)Â Applied psychology
- (B)Â Clinical psychology
- (C)Â Psychoanalysis
- (D)Â Psychiatry
- (D)Â Psychiatry
Overcooking of food should be avoided because overcooking:
- (A)Â Makes the food difficult to digest
- (B)Â Makes the food toxic
- (C)Â Increase the nutritive value of food
- (D)Â Reduces the nutritive value of food
- (D)Â Reduces the nutritive value of food
Optical fibre operates on the principle of:
- (A)Â Tyndal effect
- (B)Â Photoelectric effect
- (C)Â Laser technology
- (D)Â Total internal reflection
- (D)Â Total internal reflection
The sensation of the skin is perceived by:
- (A)Â Epidermis
- (B)Â The dermis
- (C)Â Endodermis
- (D)Â None of these
- (B)Â The dermis
The loudness of sound depends on its:
- (A)Â Wavelength
- (B)Â Frequency
- (C)Â Amplitude
- (D)Â All of these
- (C)Â Amplitude
A person standing in front of a mirror finds his Image smaller than him and erect. this implies that the mirror is:
- (A)Â Plane
- (B)Â Concave
- (C)Â Convex
- (D)Â Not of good quality
- (C)Â Convex