NDA 2019 Paper 2 | Physics Question 183 | General Science

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

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Soaps clean surfaces on the principle of based on

viscosity

floatation

elasticity

surface tension

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