KVPY Stream-SA (Class 11) Physics: Questions 43 - 45 of 242

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Question number: 43

» Ray Optics » Mirror Formula

Appeared in Year: 2013

MCQ▾

Question

A horizontal parallel beam of light passes through a vertical convex lens of focal length 20 cm and is then reflected by a tilted plane mirror so that it converges to a point I. The distance PI is 10 cm.

A beam of light passes through a convex lens and a mirror.

A Beam of Light Passes Through a Convex Lens and a Mirror.

Figure shows a horizontal parallel beam of light passes through a vertical convex lens of focal length 20 cm and is then reflected by a tilted plane mirror so that it converges to a point I.

M is a point at which the axis of the lens intersects the mirror. The distance PM is 10 cm. The angle which the mirror makes with the horizontal is,

Choices

Choice (4) Response

a.

15°

b.

45°

c.

60°

d.

30°

Question number: 44

» Current Electricity » Series and Parallel Combinations of Resistors

Appeared in Year: 2013

MCQ▾

Question

Consider the circuit shown in the figure below:

Circuit diagram of combination of 8 identical resistors

Circuit Diagram of Combination of 8 Identical Resistors

In figure circuit diagram of combination of eight identical resistors are shown.

All the resistors are identical. The ratio II is,

Choices

Choice (4) Response

a.

5

b.

6

c.

8

d.

4

Question number: 45

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

If the current through a resistor in a circuit increases by 4.5%, the power dissipated by the resistor,

Choices

Choice (4) Response

a.

Increases approximately by 4.5%

b.

Increases approximately by 9%

c.

Increases approximately by 0.66%

d.

Decreases approximately by 9%

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