7. Which of the following colors of light has the longest wavelength?

8. The SI unit of magnetic flux density is:

1. A radioactive substance has a half-life of 20 years. What fraction of the original sample will remain after 80 years?

14. Which of the following is used in detecting radiation?

6. The change in the direction of a wave as it passes from one medium to another is called:

15. The time taken for the activity of a radioactive sample to reduce to half its original value is the:

9. A transformer has 200 turns in the primary and 600 turns in the secondary. If the primary voltage is 110V, what is the secondary voltage?

10. The property of a body to resist a change in its state of rest or uniform motion is:

3. Which of the following is used to measure the relative density of a liquid?

4. The process by which electrons are emitted from a heated metal surface is:

14. In a photoelectric effect experiment, the slope of the graph of stopping potential (Vs) against frequency (f) represents:

11. Which of the following emissions has the highest ionizing power?

12. The process by which a heavy nucleus splits into two lighter nuclei is known as:

2. The maximum displacement of a particle from its equilibrium position is known as:

5. Calculate the electrical energy consumed by a 2kW heater in 5 hours.