IGCSE Physics Paper-1: Specimen Questions with Answers 112 - 114 of 149

Which particles do not experience an electromagnetic force?

Answer

d.

Explanation

• Charged particles interact by emitting and absorbing photons.
• Photons do not experience an electromagnetic force,
• And they do not interact with each other.
• The electromagnetism is produced by the energy and momentum they carry.

A ruler is used to measure length of pen.

What would be the length of the pen?

Answer

a.

Explanation

• The length of the pen would be 47 cm.
• The tip of the pen is at 6 cm on scale and end of the pen at 53 cm.
• The required length is .

Which of the following symbol is for the Light Dependent Resister?

Answer

c.

Explanation

• In the dark conditions the Light dependent resistor LDR has a high resistance.
• In the light the resistance of the LDR is very low.
• The symbol of the Light Dependent Resistor is