IGCSE Physics Paper-1: Specimen Questions with Answers 77 - 79 of 149

Question 77

Question MCQ▾

What would be the best unit to measure this?

Figure of Measuring Cylinder

Choices

Choice (4)

a.

mm2

b.

cm2

c.

mm3

d.

cm3

Edit

Answer

c.

Explanation

The given figure shows the measuring cylinder which measure volume of the liquid. And the scale shown in figure is in mm, so volume of liquid measure by this cylinder is in mm3

Question 78

Question MCQ▾

A radio broadcasting shows 200 m. What does 200 m stand for?

Choices

Choice (4)

a.

its speed

b.

its wavelength

c.

its frequency

d.

its amplitude

Edit

Answer

b.

Explanation

Here a woman turns her radio to a station broadcasting on 200 m.

Frequency means one complete revolution per unit time and unit of frequency is Hz or 1/s, amplitude is unit less and unit of speed is m/s.

Only unit of wavelength is meter. Thus woman turns wavelength of station.

Question 79

Question MCQ▾

Thumb is placed on bicycle outlet. If air is pulled in what change will occur to pressure and volume?

A Student Stops the Air Coming in Bicycle Pump

What happens to the pressure and to the volume of the trapped air as the pump handle is pulled in?

Choices

Choice (4)

a.

Pressure increases, volume remains the same

b.

Pressure increases, volume decreases

c.

Pressure decreases, volume remains the same

d.

Pressure decreases, volume decreases

Edit

Answer

d.

Explanation

As we remove pressure then volume is expand

In above case if pump handle is pulled then pressure is relish. So, pressure is decrease and volume is increase.

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