IGCSE Physics Paper-1: Specimen Questions with Answers 115 - 118 of 149

What is the momentum of a 10kg truck travelling at 5 m/s?

Answer

d.

Explanation

Momentum refers to the quantity of motion of an object.

Momentum (kg m/s)

How many Electrons are in a nucleus of Cl?

Answer

d.

Explanation

A = Mass number = 35

Here, the Z= Atomic number = number of protons = number of electrons present in the atom = 17

Three rays of light fall on a concave lens as shown.

Which diagram shows the path of the rays passing through the lens?

Answer

b.

Explanation

• Concave lens is thicker at the edges than the centers.

• The rays get diverge from the normal.

• The image formed by the concave lens is diminished image.

• It is smaller than the object and

• The image is virtual image.

Mercury of u-tube is exposed to air at below the sea level. What is the height of the mercury?

Answer

b.

Explanation

• Pressure at the surface of the earth or at sea level is equal in all directing. And when we go higher or mountain regions the pressure level decreases.

• At below sea level or lower down of the sea the pressure exerted at more pressure.

• Pressure exert always from the atmosphere to the lower.