Unit 2 Physics June 2011
Please choose one of the following options for each question:
1. A laser beam is directed at the surface of a smooth, calm pond as shown in the diagram.
Which organisms could be illuminated by the laser light?
A. The bird and the fish.
B. The crab and the pondweed.
C. The bird and the pondweed.
D. The crab and the fish.
2. A student wants to find the internal resistance of a cell. He plots a graph of the potential difference across the terminals of the cell against the current through the cell.
Which of the following quantities gives the internal resistance of the cell?
A. The area under the graph
B. The intercept on the current axis.
C. The intercept on the potential difference axis.
D. The magnitude of the gradient.
3. A longitudinal wave is moving along a spring. Two points on the spring are separated by half a wavelength. The displacements at these points on the spring are always
B. in the same direction as each other.
C. in opposite directions to each other.
D. in a direction at right angles to the direction of travel of the wave.
4. Which of the following statements about infrared radiation and ultraviolet radiation is true?
A. An ultraviolet photon has more energy than an infrared photon
B. Energy can be transferred by infrared radiation but not by ultraviolet radiation.
C. In a vacuum, infrared radiation travels faster than ultraviolet radiation.
D. Ultraviolet radiation has a longer wavelength than infrared radiation
5. A negative temperature coefficient thermistor is connected as shown in the circuit diagram.
The cell has a negligible internal resistance. The effect of decreasing the temperature of the thermistor is that the
A. ammeter reading will decrease.
B. ammeter reading will increase.
C. voltmeter reading will decrease.
D. voltmeter reading will increase.
6. The unit of potential difference is the volt. A correct alternative unit is
A. J A
B. J A s
C. J A s
D. J A
7. The diagram represents shallow water waves of constant wavelength passing through two small openings in a barrier.
The statement which best describes the interference at point P is:
A. It is constructive and causes a longer wavelength.
B. It is constructive and causes an increase in amplitude.
C. It is destructive and causes a shorter wavelength.
D. It is destructive and causes a decrease in amplitude.
8. A wave is diffracted as it passes through an opening in a barrier. The amount of diffraction that the wave undergoes depends on both the
A. amplitude and frequency of the incident wave
B. wavelength and amplitude of the incident wave
C. wavelength of the incident wave and the size of the opening.
D. amplitude of the incident wave and the size of the opening
9. Two wires of the same material are connected in series in the circuit shown.
10. Which of the following provides evidence that light has a wave nature?
A. The emission of light from an energy-level transition in a hydrogen atom.
B. The diffraction of light passing through a narrow opening.
C. The absorption of ultra-violet radiation in the photoelectric effect
D. The reflection of light from a mirror