Magnifying power of a simple microscope can be increased by ?
A. increasing focal length of the lens
B. Decreasing focal length of the lens
C. Lens of large aperture
D. lens of short aperture
E. None of these
A nuclear reactor is a device used to carry out controlled nuclear reaction whereas GM counter is a device used to detect?
A. Current
B. Voltage
C. Nuclear Radiation
D. power
E. None of these
A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?
A. 25 miles per sec
B. 60 miles per sec
C. 7 miles per sec
D. 10 miles per sec
E. None of these
Night vision is possible with the help of ___________?
A. Red light
B. Violet light
C. Infrared Rays
D. Ultra violet Light
E. None of these
Myopia is a defect of Human eye. it can be corrected by using a lens called?
A. Convex lens
B. Concave lens
C. Cylindrical lens
D. Plano convex lens
E. None of these
The instrument which i specially design for recording earth quake wave is called seismograph which measure earth quake waves on a ____________?
A. Diatonic scale
B. Fahrenheit Scale
C. Richter scale
D. Celsius Scale
E. None of these
In humans , most nutrient molecules are absorbed by the ?
A. Small intestine
B. Stomach
C. Liver
D. Large intestine
E. None of these
Cobalt is a material which is ?
A. Strongly attracted by a magnet
B. Not attracted by a magnet
C. not a magnet
D. Weakly attracted by a magnet
E. None of these
What is the body temperature of a normal man?
A. 81.1 °C
B. 37.0 °C
C. 98.6 °C
D. 21.7 °C
Which of the following helps in clotting of blood?
A. Vitamin B1
B. Vitamin B2
C. Vitamin D
D. Vitamin K