GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 044

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 044

431). In a sitar wire which one of the following types vibration is produced?
A). Progressive longitudinal
B). Stationary longitudinal
C). Progressive transverse
D). Stationary transverse

Answer: Stationary transverse

   
432). Consider the following statements : The principle of total internal reflection is applicable to explain the
1. formation of mirage in desert.
2. formation of image in microscope.
3. colour of evening sky.
4. operation of optical fibers.
Which of the statements given above are correct?
A). 1 and 4
B). 3 and 4
C). 2 and 3
D). 1 and 2

Answer: 1 and 4

   
433). Which of the following statements is/are true regarding a light wave travelling from air to glass? 1. Its frequency remains unchanged. 2. Its speed changes. Select the correct answer using the code given below :
A). 1 only
B). 2 only
C). Both 1 and 2
D). Neither 1 nor 2

Answer: Both 1 and 2


   
434). When an optician prescribes a 5D lens, what does it mean?
A). Concave lens of 20 cm focal length
B). Convex lens of 20 cm focal length
C). Concave lens of 5 cm focal length
D). Convex lens of 5 cm focal length

Answer: Concave lens of 20 cm focal length


   
435). If a substance is behaving as convex lens in air and concave lens in water then which one of the following is its refractive index?
A). Smaller than air
B). Greater than both air and water
C). Greater than air but lesser than water
D). Almost equal to water

Answer: Greater than air but lesser than water



436). The sun is visible a little before the actual sunrise because of which one of the following?
A). Atmospheric reflection
B). Atmospheric dispersion
C). Atmospheric diffraction
D). Atmopheric scattering

Answer: Atmopheric scattering


   
437). DC current can be controlled by which one of the following components?
A). Impedance
B). Resistance
C). Capacitance
D). Inductance

Answer: Resistance


   
438). The wavelength of X-rays is of the order of
A). 1 mm
B). 1 cm
C). 1 micron
D). 1 angstrom

Answer: 1 angstrom


   
439). In vacuum, the speed of light
A). depends on its wavelength
B). depends on its frequency
C). depends on its intensity
D). neither depends on its wavelength, frequency nor intensity

Answer: neither depends on its wavelength, frequency nor intensity


   
440). Which one of the following statements correctly defines power?
A). Energy supplied per unit time
B). Energy of an object due to its motion
C). Energy of an object due to its position
D). None of these

Answer: Energy supplied per unit time