Physics SS3 2nd Term

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

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

 

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

 

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

 

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

 

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

 

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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?

 

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

 

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

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

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

 

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

 

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

 

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

 

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8. The SI unit of magnetic flux density is:

 

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