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

Question 126

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Question

MCQ▾

Which circuit is an open circuit?

Choices

Choice (4)
a.
Image of the Circuit -4
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b.
Image of the Circuit -2
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c.
Image of the Circuit -3
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d.
Image of the Circuit -1
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Answer

a.

Explanation

Image of the Circuit

Image of the Circuit

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  • 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

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Question

MCQ▾

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

Image of Water surface

Image of Water Surface

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Where will be the image formed?

Choices

Choice (4)
a.
Image formed part -2
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b.
The Image formed part-1
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c.
Image formed part -3
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d.
Image formed part -4
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Answer

d.

Explanation

The Image formed

The Image Formed

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  • 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

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Question

MCQ▾

Which graph shows the Resistance of a filament wire?

Choices

Choice (4)
a.
Image Filament wire-2
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b.
Image Filament wire-4
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c.
Image Filament wire-3
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d.
Image Filament wire-1
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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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