NDA 2019 Paper 2 | Physics Question 182 | General Science

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

If the work done on the system or by the system is zero, then which one of the following statement for a gas kept at a certain temperature is correct?

Change in internal energy of the system is equal to flow of the hat in or out of the system.

Change in internal energy of the system is less than heat transferred.

Change in internal energy of the system is more than the heat flow.

Cannot be detrmined.

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the following part of an electric circuit.

Image

The total electrical resistance in the given part of the electric circuit is

$${{15} \over 8}$$$$\Omega$$

$${{15} \over 7}$$$$\Omega$$

$${15}$$$$\Omega$$

$${{17} \over 3}$$$$\Omega$$

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following statements regarding lenses is not correct?

A convex lens produces both real and virtual images.

A concave lens produces both real and virtual images.

A convex lens can produce images equal, greater and smaller than the size of the object.

A concave lens always produces images smaller than the size of the object.

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

10 g of ice at $$-$$10$$^\circ$$ C is mixed with 10 g of water at 0$$^\circ$$ C. The amount of heat required to raise the temperature of mixture to 10$$^\circ$$ C is

400 cal

550 cal

1050 cal

1200 cal

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