NDA 2019 Paper 1 | Physics Question 213 | General Science

NDA 2019 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

The figure shown below gives the time (t) versus position (x) graph of three objects A, B and C. Which one of the following is the correct relation between their speeds v_A, v_B and v_C, respectively at any instant (t > 0) ?

Image

v_A < v_B < v_C

v_A > v_B > v_C

v_A = v_B = v_C $$\ne$$ 0

v_A = v_B = v_C = 0

NDA 2019 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

1 dyne (a unit of force in CGS system) equals to

10³ g-cm/s²

10^$$-$$3 g-cm/s²

10⁵ kg-cm/s²

10^$$-$$5 kg-m/s²

NDA 2019 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

In the given velocity (v) versus time (t) graph, accelerated and decelerated motions are respectively represented by line segments

Image

CD and BC

BC and AB

CD and AB

AB and CD

NDA 2019 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following statement regarding a thermo flask is not correct?

The walls of flask are separated by vacuum and made of glass which is a poor conductor of heat.

The glass walls themselves have shiny surfaces.

The surface of inner wall radiates good amount of heat and the surface of outer wall absorbs some of the heat that is radiated from the inner wall.

The cork supports are poor conductors of heat.

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