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Showing posts with label physics. Show all posts
Showing posts with label physics. Show all posts

SSC CHSL 2015

A) 2:1
B) 4:1
C) 1:4
D) 1:16

## Question Hydraulic brakes work on the principle of

A) Newton's law
B) Thomson's law
C) Pascal's law
D) Bernoulli's theorem

## Question In which of the following convection takes place?

A) Solids and liquids only
B) Liquids and gases only
C) Gases and solids only
D) Solids, liquids and gases

## Question 112 A body falling freely under the action of gravity has

A) Maximum Weight
B) Minimum Weight
C) Variable Weight
D) No Weight

A) Amplitude
B) Frequency
C) Wavelength
D) Intensity

## Question 60 During the recent Venus transit (June 2012), the planet appeared as a tiny black circle moving on the Sun. The black colour on the Sun is because the planet

A) is black in colour
B) obstructed all light from the Sun
C) was invisible due to bright rays from the Sun
D) behaved as a black hole during its transit

## Question 51 The waves that helps scientists to understand the internal structure of the Earth are

A) primary waves
B) secondary waves
C) surface waves
D) longitudinal waves

A) resistor
B) inductor
C) capacitor
D) conductor

## Question 24 It is difficult to cut things with a blunt knife because

A) the pressure exerted by knife for a given force increses with increase in bluntness
B) A sharp edge decreases the pressure exerted by knife for a given force
C) a blunt knife decreases the pressure for a given force
D) a blunt knife decrease the area of intersection

A) high speed
B) high pressure
C) low speed
D) low pressure

## Question 88 Ball bearings are used in bicycles, cars, etc., because

A ) The actual area of contact between the wheel and axle is increased
B ) The effective area of contact between the wheel and axle is increased
C ) The effective area of contact between the wheel and axle is reduced
D ) None of the statements is correct

A) Wm-1K-1
B) Wm/K
C) Wm-1/K-1
D) Js-1m-1K

## Question 95 Which of the following statements regarding heavy water are correct?

1. It is extensively used as a moderator in nuclear reactors
2. It cannot be used in exchange reaction to study reaction mechanism
3. Viscosity of heavy water is relatively smaller than that of ordinary water
4. The dielectric constant of heavy water is smaller than that of ordinary water
Select the correct answer using the code given below:
A) 1 and 2
B) 2 and 3
C) 3 and 4
D) 1 and 4

## Question 96 Conservation of momentum in a collision between particles can be understood on the basis of:

A) Newton's first law of motion
B) Newton's second law of motion
C) Both Newton's second law of motion and Newton's third law of motion
D) Conservation of energy

## Question 98 To weld metals together, high temperature is required. Such a high temperature is obtained by burning:

A) Acetylene in oxygen
B) LPG in oxygen
C) Methane in oxygen
D) Acetylene in nitrogen

## Question 100 Magnetic meridian is an imaginary

A) line along north-south
B) point
C) vertical plane
D) horizontal plane

## Question 104 In SI unit of force 'Newton' (N) is given by (where m stands for metre and s stands for second);

A) 1 N = 1 kg/ms2
B) 1N = 1kgm/s2
C) 1N = 1 kgs2/m
D)1 N = 1 kgms2

A) its frequency
B) its amplitude
C) its speed
D) its pitch

## Wednesday, 30 September 2015

### Which one among the following colours has the highest wavelength?

CDS-II-2013 Questions

A) Violet
B) Green
C) Yellow
D) Red

## Monday, 14 September 2015

### Optical fibres, though bent in any manner allows light to pass through. What is the inference that one can draw from it?

NDA NA Exam I 2015 Questions

## Question 70 Optical fibres, though bent in any manner allows light to pass through. What is the inference that one can draw from it?

A) The concept that light travels in straight path is wrong
B) Light can flow through optical fibres
C) Light can travel through the fibres because of their ductility
D) Light can travel through the fibres due to multiple total internal reflections