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iGCSE Physics Revision Round 2

Total questions: 52

Worksheet time: 48mins

Name
Class
Date
1.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
2.

Two masses of mass 10.0 and 6.0 kg are hung from massless strings at the end of a light rod. The rod is virtually weightless. A pivot (fulcrum) is placed off center and the system is free to rotate. If the 6.0 kg mass is 4.0 m away from the pivot, how far away is the 10.0 kg mass if the system is not rotating?

a)

0.42 m

b)

2.4 m

c)

4.8 m

d)

4.2 m

3.

What is the correct equation for acceleration

a)

a = (v - u) / t

b)

a = d / t

c)

a = f x m

4.

What is the correct equation linking voltage current and resistance

a)

V = IR

b)

R = VI

c)

I = VR

5.

What is the correct equation linking charge current and time

a)

Q = It

b)

I = Qt

c)

t = QI

6.

What is the correct equation for gravitational potential energy

a)

m x g x h

b)

m x g / h

c)

m x h / g

7.

What is the correct equation for kinetic energy

a)

1/2 x m x v2

b)

m x v2

c)

1 / 2 x v x m2

8.

A tunnel has a length of 50 km. A car takes 20 min to travel between the two ends of the tunnel. What is the average speed of the car?

a)

2.5 km / h

b)

16.6 km / h

c)

150 km / h

d)

1000 km / h

9.
a)

A

b)

B

c)

C

d)

D

10.

Which speed/ time graph applies to an object at rest?

a)

A

b)

B

c)

C

d)

D

11.
a)

10 m

b)

20 m

c)

100 m

d)

200 m

12.

What is the efficiency of a solar cell if 1000 J of solar energy hits the cell and 200 J are converted into electrical energy?

a)

10%

b)

20%

c)

30%

d)

40%

13.
a)

A

b)

B

c)

C

d)

D

14.
a)

A

b)

B

c)

C

d)

D

15.
A man sees a stone at the bottom of a pool of water. Which path could be taken by light from the stone to the man? 
a)
A
b)
B
c)
C
d)
D
16.
The diagram shows a ray of light from one point on a lamp striking a plane mirror. The image of the point on the lamp formed by the mirror is 
a)
at P and is real.
b)
at P and is virtual.
c)
at R and is real.
d)
at R and is virtual. 
17.

An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?

a)

440 W

b)

110 W

c)

55 W

d)

0.0023 W

18.
a)
b)
c)
d)
19.

In the circuits shown, all resistors are identical

Which circuit has the least resistance?

a)
b)
c)
d)
20.

A student sets up four circuits containing diodes.

Which of the circuits will produce a rectified current through the bulb?

a)
b)
c)
d)
21.

What is component Z ?

(a)  

22.

What is component B

a)

Thermistor

b)

Resistor

c)

Light Dependent Resistor

d)

Relay

23.

What happens to resistance when the length of the wire increases?

a)

Stays the same

b)

Increases

c)

Decreases

24.

If the current through a resistor is 2A and the voltage across it is 12V, what is the resistance

a)

12Ω

b)

6Ω

c)

24Ω

d)

0.167Ω

25.

The explosion that sent the universe flying out is called _____.

a)

The Big Bang

b)

The Milky Way

c)

The Solar System

d)

The Sun

26.

As galaxies move away from our galaxy

a shift on the electromagnetic spectrum

(EMS) is noticed. This phenomena is

called _____________.

a)

redshift

b)

blueshift

c)

unshift

d)

blackshift

27.
Earth and its solar system are a part of which of the following galaxies?
a)
Andromeda
b)
Black Eye
c)
Milky Way
d)
Cartwheel
28.
Which of the following best describes a galaxy? A galaxy is –
a)
the ending of the life cycle of all super massive stars in the universe.
b)
a massive system of stars, gas, dust, and dark matter bound together by gravity.
c)
a visible body of liquid or frozen crystal droplets suspended above a planetary surface.
d)
the visible path of a meteoroid as it enters Earth’s atmosphere.
29.

When a Red Giant runs out of fuel, it become a:

a)

Supernova

b)

Nebula

c)

White Dwarf

d)

Main Sequence Star

30.

The unit of activity is...

a)

Becquerel

b)

Seconds

c)

Metres

d)

Sievert

31.

The atomic number indicates how many...are found in the nucleus of an atom.

a)

Neutrons

b)

Protons

c)

Electrons

d)

Quarks

32.

What is the half-life of this radioactive substance?

a)

5700 years

b)

11400 years

c)

17100 years

d)

22800 years

33.

The overall charge on an alpha particle is...

a)

-1

b)

0

c)

+1

d)

+2

34.

Carbon-12 has an atomic number of 6 and a mass number of 12. How many electrons would be found in a neutral atom of carbon-12?

a)

6

b)

12

c)

18

d)

24

35.

a)

A

b)

B

c)

C

d)

D

36.

The equation shows the decay of the nuclide X:


What are the values of P and Q ?

a)

A

b)

B

c)

C

d)

D

37.

Due to their charges alpha, beta and gamma radiations deflect in different ways when entering an electric field. In this case

a)

red = beta

b)

yellow = gamma

c)

blue = alpha

d)

blue = beta

38.
According to the graph the half life indicated is about
a)
3.5
b)
3.0
c)
8.0
d)
7.5
39.

what is the name given to the effect that allows wavefronts to reach point X, shown in the diagram?

(a)  

40.
a)

A

b)

B

c)

C

d)

D

41.

Sound waves travel at a speed of 1500m/s through a substance. Their wavelength is 5.0 cm. What is their frequency?

(a)  

42.

Which of the following gives the sizes of astronomical objects in order of increasing size?

a)

Solar system, universe, galaxy

b)

Universe, galaxy, solar system

c)

Solar system, galaxy, universe

d)

Galaxy, solar system, universe

43.

Astronomers make detailed observations of individual stars. Which measurement will lead to finding the surface temperature of the star?

a)

The colour of the star.

b)

The brightness of the star.

c)

The observed size of the star.

d)

The motion of the star.

44.

Stars that are stable and producing energy from fusion for millions (or billions) of years are called...

a)

Red giant stars.

b)

Brown dwarf stars.

c)

Variable stars.

d)

Main sequence stars.

45.
Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.
a)
It is not moving
b)
It is moving away from Earth (Redshift)
c)
It is moving towards Earth (Blueshift)
d)
It is moving towards Earth (Redshift)
46.
Blue stars are the _____________.
a)
hottest
b)
coolest
c)
smallest
47.

What happens to light during total internal reflection?

a)

The light reflects back into the original medium at the same angle.

b)

The light refracts closer to the normal line.

c)

The light refracts farther away from the normal line.

d)

The light reflects at the angle it would have refracted at.

48.

When will total internal reflection occur?

a)

When light travels from a less dense to a more dense medium

b)

When the angle of incidence is smaller than the critical angle

c)

When the angle of incidence is greater than the critical angle

d)

When the light cannot pass through a medium

49.

When the angle of refraction is 90 °\degree  the angle of incidence is called the... 

a)

Angle of incidence

b)

Critical angle

c)

Angle of total internal reflection

d)

Angle of refraction

50.

_____ cables transmit beams of light without allowing any of the light to escape until it gets to the end of the cable.

a)

Ethernet

b)

Fiber optic

c)

Armored

d)

Coaxial

51.

see image

a)

A

b)

B

c)

C

d)

D

52.

see image

a)

A

b)

B

c)

C

d)

D

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