IGCSE Physics Paper-1: Specimen Questions with Answers 126 - 128 of 149

Question 126

Question

MCQ▾

Which circuit is an open circuit?

Choices

Choice (4)

a.

The Circuit -4

b.

The Circuit -2

c.

The Circuit -3

d.

The Circuit -1

Answer

a.

Explanation

The Circuit
  • The electric circuit must be closed to pass the electricity through it.
  • In the above circuit D the switch is opened.
  • It means it the circuit is disconnected;
  • There would no current will passes through it.

Question 127

Question

MCQ▾

The figure shows two rays from a point P incident on a water surface.

Water Surface

Where will be the image formed?

Choices

Choice (4)

a.

Image Formed Part -2

b.

The Image Formed Part-1

c.

Image Formed Part -3

d.

Image Formed Part -4

Answer

d.

Explanation

The Image Formed
  • A and B are the incident Rays and when they fall on the surface they reflect back.
  • C and D are the reflected rays.
  • The image will fall where these reflected rays merge.
  • The image is formed as the same size of the object.

Question 128

Question

MCQ▾

Which graph shows the Resistance of a filament wire?

Choices

Choice (4)

a.

Image Filament Wire-2

b.

Image Filament Wire-4

c.

Image Filament Wire-3

d.

Image Filament Wire-1

Answer

b.

Explanation

  • The current through a filament lamp is not directly proportional to potential difference (p. d)
  • Because of this the filament gets hot which cause the resistance to increase
  • Filament wire in a bulb gets extremely hot when electric current passes through it and this cause it to glow.

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