Physics MCQ Assessment

1. A water wave moves from deep water to shallow water. Its speed decreases in shallow water. Which statement correctly describes the frequency and wavelength of the wave in the shallow water?

2. A loudspeaker and a microphone are placed side by side in front of a wall. The loudspeaker makes a sound that is detected by the microphone. The microphone is connected to a device known as an oscilloscope, which is set so that each horizontal division on its screen represents a duration of 0.01 s. The microphone detects the original sound and the echo.

The speed of sound in air is 300 m/s.

What is the distance between the loudspeaker and the wall?

3. The diagram shows two buoys P and Q sitting on a pond. A wave moves across the pond from left to right.

At the moment shown, buoy Q is at the crest and buoy P is at the trough. Which row describes the movement of the buoys during the next cycle of the wave?

1. In nuclear ……1……, hydrogen nuclei ……2…… to form helium nuclei, releasing energy.

Which words correctly complete blanks 1 and 2?

1. n an experiment, smoke particles are suspended in air and viewed through a microscope. The smoke particles undergo jerky random motion.

Which statement is correct?

1. A ball is dropped from the top of a 125 m tall building.

What is the time it takes to fall to the ground? Take g to be 10 m/s2.

2. The graph shows the total resistive force that acts on a car of mass 830 kg over a period of time. The car is at rest at t = 0 s. A constant driving force of 2500 N acts on the car from t = 2 s to t = 24 s.

Which statement is incorrect?

3. A rubber ducky is released from the bottom of a pool of water. Almost immediately, it rises at a constant speed to reach the surface of the water. Which of the following best describes the resultant force acting on the rubber ducky?

4. An object travels for 20 s with a constant speed of 10 m/s. For the next 10 s, it accelerates uniformly to 20 m/s.

What is the average speed of the object during the last 15 s of its motion?

5. The diagram shows the speed-time graph of a moving object over a period of 50 s.

What is the average speed of the object when it is decelerating?

6. A block of wood of mass 2.0 kg is pushed along the horizontal flat surface of a bench with a force of 4.0 N. It moves at constant speed. When the pushing force is increased to 12 N, what is the acceleration of the block?

7. Which of the following correctly describes an action-reaction pair of forces?

8. A box of mass 2.0 kg is pushed along a 12 m ramp with a force F of 15.0 N and accelerates from point P to point Q. The speed of the box is 2.0 m / s at P and the average frictional force acting on the box is 4.0 N throughout the motion. The gravitational field strength is 10 N / kg.

What is the speed of the box at point Q?

9. The acceleration of free fall on a particular planet is 8.0 m s-2. An object was dropped from rest and hit the ground after 1.5 s.

Air resistance is negligible.

From what height was the object dropped?

10. Alex is jogging at constant speed beside a road. He sees the traffic lights in front of him turn amber, so he begins to jog at a lower constant speed. Which distance-time graph illustrates Alex’s motion?

1. The diagram below shows a simple mercury barometer that has been correctly constructed. At which point in the mercury column is the pressure equal to 10 cm Hg less than the atmospheric pressure?

2. A gas supply is connected to a mercury barometer. The same gas supply is then connected to a water barometer.

The density of mercury is 13 600 kg / m3 and the density of water is 1000 kg / m3. What is the value of h?

3. A gas is in a sealed container of constant volume. The gas is heated and the pressure of the gas on the walls of the container increases.

How do the particles of the gas cause this increase in pressure?

1. A house-owner replaces a blown fuse for the lights of the house. When the lights are switched on, the second fuse also blows. The house-owner then uses a third fuse with a higher rating than the previous two.

Why is this not a sensible thing to do?

2. Two resistors of 3 ohms and 6 ohms are arranged in parallel. A p.d. is connected across the terminals X and Y.

The current through the 6 ohms resistor is 4 A.

What is the current in the ammeter?

1. A 0.30 kW heater is used to heat a well-insulated 3.0 kg mass of copper for 5 minutes.

The temperature rises by 75 oC.

What is the specific heat capacity of copper?

2. Which statement about the transfer of thermal energy is correct?

3. Which process(es) of thermal energy transfer require a medium?

4. A hot metal plate is placed near to a cold metal plate.

Which row shows the colour for the hot plate and for cold plate that causes the temperature of cold plate to increase most slowly?

1. Which properties make materials suitable for use as a core in an electromagnet?

2. A horizontal beam of electrons passes between the two poles of a magnet.

In which direction is the beam deflected?

3. A magnet is pushed slowly into a coil, and there is a current in the coil in the direction shown.

The magnet is then pulled out quickly from the same end of the coil.

What happens to the direction and the size of the current?

1. A uniform metre rule is supported by vertical wires P and Q and remains horizontal as shown in diagram 1. The tension in each wire is 1 N. When a weight of 4 N is hung from the metre rule at the position as shown in diagram 2, the tension in Q becomes 2.3 N while the metre rule remains horizontal.

What is the distance d of the weight 4 N from end P?