When ultraviolet light is incident on certain metallic particles are emitted. These particles are called
A. positrons B. protons C. photoelectrons D. photons Correct Answer: Option D – photons
Which of the following statements about a neutral atom is correct? The
A. core is composed of electrons and protons B. number of electrons is equal to that of neutron C. number of neutrons is equal to that of protons D. number of protons is equal to that of electrons. Correct Answer: Option B – number of electrons is equal to that...
Which of the following properties is not exhibited by sound waves?
A. Diffraction B. Polarization C. Interference D. Reflection Correct Answer: Option C – Interference
The area under a velocity-time graph represents
A. speed B. acceleration C. moment D. distance Correct Answer: Option B = acceleration
An instrument used to measure relative humidity is the?
A. hygrometer B. hydrometer C. pyrometer D. manometer Correct Answer: Option B – hydrometer Explanation A hydrometer is an instrument used for measuring the relative density of liquids based on the concept of buoyancy. A hygrometer measures humidity, the amount...Products
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