GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 056

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 056

551). In winter, the temperature of the inside wall of a house as compared to the temperature of the air in the room is
A). lower
B). higher
C). the same
D). depends on the atmospheric pressure

Answer: lower


   
552). At what temperature are the readings of a centigrade and Fahrenheit thermometers the same ?
A). - 40 °C
B). 40°C
C). 100°C
D). 212°C

Answer: - 40 °C



   
553). Which of the following electronic device is used for digital display in electronic calculators?
A). photo diodes
B). zener diodes
C). LEDs
D). none of these

Answer: LEDs


   
554). Which one of the following substances is non magnetic?
A). glass
B). wood
C). silver
D). all these

Answer: all these

   
555). Sound travels fastest through
A). vacuum
B). steel
C). water
D). air

Answer: steel



556). According to Newton's formula, the velocity of sound in a medium is
A). V=√(E/D)

B). V=√E/D
C). V=E/√d

D). V=EA/d

Answer: V=√(E/D)



   
557). Light emerging from a Nicole prism has
A). vibrations in all directions
B). no vibration at all
C). vibration in two mutually perpendicular directions
D). vibrations in only one direction

Answer: no vibration at all

   
558). The unit of refractive index is
A). meter
B). degree
C). no unit
D). degree^-1

Answer: no unit


   
559). Which of the following is an insulator ?
A). aluminium
B). copper
C). glass
D). silver

Answer: glass


   
560). A radar which detects the presence of the enemy aircraft uses
A). sound waves
B). radio waves
C). electric waves
D). ultrasonic waves

Answer: radio waves