Q1. Who enunciated the laws planetary motion?
(a) Nicolaus Copernicus
(b) Johannes Kepler
(c) Isaac Newton
(d) Galileo
Q2. Sun’s heat reaches us by
(a) Conduction
(b) Convection
(c) Radiation
(d) Reflection
Q3. Ocean currents are an example of
(a) convection
(b) conduction
(c) insulation
(d) radiation
Q4. The audio signals of TV are
(a) Amplitude modulated
(b) Frequency modulated
(c) Unmodulated
(d) Velocity modulated
Q5. Air coolers are more suitable for
(a) hot and humid climate
(b) hot and dry climate
(c) cool and humid climate
(d) cool and dry climate
Q6. Electricity is transmitted over long distances
(a) it is fast
(b) there is less wastage of energy
(c) it is safer
(d) it is cheaper
Q7. The device which converts sound energy into electrical energy is called
(a) Amplifier
(b) Speaker
(c) Microphone
(d) Transmitter
Q8. Myopia is the same as
(a) Near sightedness
(b) Astigmatism
(c) Presbyopia
(d) Long sightedness
Q9. The sound produced by a bat is—
(a) audible
(b) subsonic
(c) infrasonic
(d) ultrasonic
Q10. To measure the speed of an approaching car a police officer shines
(a) light waves on it
(b) microwaves on it
(c) radio waves on it
(d) ultra high frequency waves on it
Q11. Forged documents are detected by
(a) ultraviolet rays
(b) infra-red rays
(c) beta rays
(d) gamma rays
Q12. Red light is used for signals because it has
(a) long wavelength
(b) high intensity
(c) high frequency
(d) low refraction in the medium
Q13. In a refrigerator, the cooling system should always be
(a) at the top
(b) at the bottom
(c) at the middle
(d) can be anywhere
Q14. Radio activity is due to
(a) unstable nucleus
(b) stable nucleus
(c) stable electronic configuration
(d) stable electronic configuration
Q15. In sunlight a rose appears red. In green light, the same rose appears
(a) red
(b) black
(c) green
(d) yellow
CRACK SSC CGL 2017
