The term ‘Blue Shift’ is used to indicate?

A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object.
B. Turning a star from white to blue
C. In future sun would become blue
D. Black hole was blue at its start
E. None of these

The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?

A. 4 days
B. 12 days
C. 16 days
D. 8 days
E. None of these

The number of spark plugs needed in a diesel engine is__________?

A. 2
B. 3
C. 0
D. 4
E. None of these

A. In asteroid belt between the orbits of Mars and Jupiter
B. In asteroid belt between the orbits of Mars and Venus
C. In asteroid belt between the orbits of Jupiter and Venus
D. Everywhere in the sky
E. None of these

Television signals are converted into light signals by___________?

A. Optical fiber
B. Transistor
C. Decoder
D. Photo diode
E. None of these

Which of the following explains the reason why there is no total eclipse of the sun?

A. Size of the earth in relation to that of moon
B. Orbit of moon around earth
C. Direction of rotation of earth around sun
D. Area of the sun covered by the moon
E. None of these

Which of the following layers make radio transmission possible?

A. Troposphere
B. Ionosphere
C. Mesosphere
D. Stratosphere
E. None of these

Diamond is a very expensive ornament. It is composed of a single element ___________?

A. Carbon
B. Gold
C. Silver
D. Platinum
E. None of these

The position of earth in its orbit, when it is at its greatest distance from the sun causing northern summer is called ___________?

A. Aphelion
B. Perihelion
C. Perigee
D. Apogee
E. None of these

Eugenics is the study of___________________?

A. Altering human beings by changing their genetic components
B. People of European region
C. Different races of mankind
D. Genetic of plants
E. None of these