NDA 2015 Paper 2 | Physics Question 21 | General Science

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NDA 2015 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

A man is sitting in a train which is moving with a velocity of 60 km/h. His speed with respect to the train is

$${{10} \over 3}$$ m/s

60 m/s

infinite

zero

NDA 2015 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following is the SI unit of the thermal conductivity of a material?

Wm^$$-$$1K^$$-$$1

Wm/K

Wm^$$-$$1/K^$$-$$1

Js^$$-$$1m^$$-$$1K

NDA 2015 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following statements is not correct?

Conduction can occur easily in solids, less easily in liquids but hardly at all in gases.

Heat energy is carried by moving particles in a convection current.

Heat energy is carried by electromagnetic waves in radiation.

The temperature at which a solid changes into a liquid is called the boiling point.

NDA 2015 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

The resistance of a wire of length l and area of cross-section a is x $$\Omega$$. If the wire is stretched to double its length, then its resistance would become

2x $$\Omega$$

0.5x $$\Omega$$

4x $$\Omega$$

6x $$\Omega$$

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Questions Asked from Marks 2.5