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WorksheetsPhysics Challenge 8
Total questions: 40
Worksheet time: 7hrs 40mins
The relationship between stretching force, F, with the extension, x, of a spring, is given by the equation:
F = kx
where k is the spring constant.
What is the unit of k?
N m-1
N m-2
kg m-1
kg m-2
The diagram shows two students skating towards P.
What will happen to the girl when the boy releases her hand?
Stays stationary
Moves towards P
Moves towards Q
The diagram shows an athlete performing the high jump.
What is the function of the mattress?
To reduce the collision time between the athlete and the mattress
To reduce the change of momentum of the athlete when he hits the mattress
To reduce the impulsive force acting on the athlete when he hits the mattress
The diagram shows a pillion rider moving backwards when the motorcycle accelerates.
The backwards movement of the pillion rider can be explained by
the concept of inertia
the concept of equilibrium of forces
principle of conservation of momentum
ciple of conservation of energy
The acceleration-time graph below shows the movement of an object.
Which velocity-time graph represents the movement of the object?
The diagram shows a load M supported by the arrangement of springs P, Q and R. All the springs are identical.
Which comparison is correct about the extension of P, Q and R?
P < Q < R
Q < R < P
R < Q < P
Q < P < R
The diagram shows a polystyrene block being pushed to a depth of h cm from the water surface.
P is the water pressure acting on surface Q.
Which graph shows the relationship between P and h when the block is pushed deeper into the water?
The diagram shows a brake system of a car.
Which principle is used in this system?
Pascal’s principle
Bernoulli’s principle
Archimedes’s principle
Principle of conservation of momentum
A lead ball with the specific heat capacity of 130 Jkg-1oC-1 was released from a high building. By assuming all the potential energy converts to heat energy, calculate the change in temperature
130 000 oC
0.77 oC
0.13 oC
7.69 oC
The diagram shows a block with the dimensions of 1 m × 2 m × 3 m. The weight of the block is 1 000 N.
What is the maximum pressure that can be exerted by the block on the floor?
100.0 N m-2
166.7 N m-2
333.3 N m-2
500.0 N m-2
600.0 N m-2
The graph shows the heating curve of a substance.
At which stage is the substance in the liquid and gaseous state at the same time?
PQ
QR
RS
ST
The diagram shows two copper blocks, L and M, touching each other.
The initial temperatures of L and M are 50 °C and 30 °C respectively.
Which statement is correct when L and M are at thermal equilibrium?
Temperature of L is higher than M
The quantity of heat in L is the same as in M
Rate of change in temperature of L is bigger than that of M
Net rate of heat flow between L and M is zero
The diagram shows a boy appearing shorter when he is in a swimming pool.
The depth of the water in the pool is 1.2 m.
The refractive index of water is 1.33.
What is the apparent depth of the pool?
0.1 m
0.3 m
0.9 m
1.1 m
1.6 m
The diagram shows a light ray directed into a glass block.
Which is the angle of refraction?
A
B
C
D
The diagram shows an object placed in front of a concave mirror.
The distance of the object is less than the focal length, f, of the mirror.
What are the characteristics of the image formed?
Real, upright, bigger than object
Real, inverted, smaller than object
Virtual, upright, bigger than object
Virtual, inverted, smaller than object
The diagram shows a light ray, P, directed into a glass block.
The critical angle of the glass is 42°.
In which direction does the light move from point Q?
A
B
C
D
A periscope made of two prisms 45o – 90o – 45o.
Which of the following diagrams represents the periscope structure correctly?
Diagram below shows a wave.
The speed of the wave is 4.0 m s-1. The distance of 5 consecutive crests is 8 m. What is the frequency of the wave?
0.4 Hz
0.5 Hz
2.0 Hz
2.5 Hz
A tilted basin contains water.
Water is dripped at a constant rate into the basin as shown in the diagram below.
Which pattern of the wavefronts will be observed in the basin?
In a Young’s double slit experiment, red fringes are formed on the screen when a red light source is used.
What will be observed if the red light source is replaced by a blue light source?
Number of fringes decreases
Brightness of the fringes increases
Distance between fringes decreases
The diagram shows a wavefront pattern produced by a dipper vibrating at a frequency of 12 Hz in a ripple tank.
What is the speed of the waves?
2 cm s-1
8 cm s-1
12 cm s-1
18 cm s-1
36 cm s-1
The diagram shows the wavefronts of a plane wave incident on a plane reflector.
Which statement is correct about the reflected and incident waves?
The speed of the reflected waves is the same as the speed of the incident waves
The wavelength of the reflected waves is shorter than that of the incident waves
The frequency of the reflected waves is lower than that of the incident waves
The directions of the reflected waves are always at right angles to the incident waves
The diagram shows the wave pattern formed by waves from two coherent sources, X and Y.
Destructive interference occurs at
R only
Q only
P and Q
P and R
The graphs show the cross-sections of water waves.
Which wave has the greatest energy?
The diagram shows the structure of an ideal transformer.
What is the potential difference across the bulb?
7 V
24 V
30 V
60 V
160 V
Which circuit can be used to determine the electromotive force of a battery?
Which diagram shows the correct direction of the induced current when the magnet is moved in the direction shown?
The diagram shows an electromagnet.
Which factor does not influence the strength of the electromagnet?
Material used for the wire
Material used for insulator of the wire
Number of turns of wire
Current flowing in the wire
The electric current supplied by a battery in a digital watch is 3.0 × 10-5A.
What is the quantity of charge that flows in 2 hours?
2.5 × 10-7C
1.5 × 10-5C
6.0 × 10-5 C
2.2 × 10-1C
A cell has an e.m.f of 1.5 V. When it is connected to an external resistor, the potential difference is 1.3 V and the currrent is 0.2 A.
What is the value of the internal resistance?
1.5 Ω
0.2 Ω
6.5 Ω
7.5 Ω
The diagram shows a circuit consisting of a diode and a bulb.
When the switch is on, the bulb does not light up.
What needs to be done to light up the bulb?
Replace with a new bulb
Increase the number of dry cells
Reverse the diode connection
Connect a resistor parallel to the bulb
Which diagram shows the correct movement of an electron beam in an electric field?
In which circuit will the light-emitting diode (LED) light up when the switch is on?
The following equation represents the decay of a uranium nucleus.
What are the values of x and y?
Which of the following statements is a characteristic of gamma radiation?
It has a positive charge
It is an electromagnetic wave
It has a higher ionizing power than alpha radiation
It has a lower penetrating than beta radiation
Radiation and matter that has the properties of both particle and wave is called
confusion
mixing
entanglement
wave-particle duality
When light of specific frequencies is shined on a surface, electrons are ejected from the surface. This is the idea behind...
Quantization of Energy
Photoelectric Effect
Compton Effect
deBroglie Waves
Uncertainty Principle
A planet of mass m moves around the Sun with a period T in a circular orbit of radius r. Which of following is an equation for the mass of the Sun?
What is the S.I unit for the universal gravitational constant, G?
If Earth is a uniform sphere of radius R which of the following graphs shows the relationship between the force of gravity F acting on a body and the distance x from the centre of the Earth?
