A motor vehicle is moving on a circle with a uniform speed. The n

Subject

General Knowledge

Class

NDA Class 12

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Sample Papers

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 Multiple Choice QuestionsMultiple Choice Questions

1.

The pH of fresh milk is 6. When it turns sour, the pH

  • becomes < 6

  • remains the same, i.e., 6

  • becomes > 6

  • becomes neutral, i.e., 7


2.

The displacement of a particle is given by x = cos2 ωt. The motion is

  • simple harmonic

  • periodic but not simple harmonic

  • non-periodic

  • None of the above


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3.

A motor vehicle is moving on a circle with a uniform speed. The net acceleration of the vehicle is

  • zero

  • towards the centre of the circle

  • away from the centre along the radius of the circle

  • perpendicular to the radius and along the velocity


B.

towards the centre of the circle


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4.

An object is undergoing a non-accelerated motion. It's rate of change in momentum is

  • a non-zero constant

  • zero

  • not a constant

  • None of the above


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5.

The motion of an electron in presence of a magnetic field is depicted in the figure given above. The force acting on the electron will be directed

  • into the page

  • out of the page

  • opposite to the motion of the electron

  • along the motion of the electron


6.

Imagine a current-carrying wire with the direction of current downward or into the page. The direction of magnetic field lines is

  • clockwise

  • anticlockwise

  • into the page

  • out of the page


7.

Which one among the following hormones stimulates the plant cells to grow in a manner such that the plant appears to be bent towards light?

  • Cytokinin

  • Auxin

  • Gibberellin

  • Abscisic acid


8.

Magnetic Resonance Imaging (MRD) is used in medical diagnosis to obtain images of our internal body organs. This is primarily possible because

  • our body possesses a permanent magnet

  • MRI uses an external magnet to generate a magnetic field in our body

  • MRI uses an external electric field to generate magnetic field in our body

  • ions motion along our nerve cells generates magnetic fields


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9.

The motion of a particle is given by a straight line in the graph given above drawn with displacement (x) and time (t). Which one among the following statements is correct?

  • The velocity of the particle is uniform

  • The velocity of the particle is non-uniform

  • The speed is uniform and the particle is moving on a circular path

  • The speed is non-uniform and the particle is moving on a straight line path


10.

The human eye is like a camera and hence it contains a system of lens. The eye lens forms

  • a straight or upright, real image of the object on the retina

  • an inverted, virtual image of the object on the retina

  • an inverted, real image of the object on the retina

  • a straight or upright, real image of the object on the iris


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