Physics Practice Question and Answer
8 Q: The unit of work is
1189 160b4b816f2c446136b8b757d
60b4b816f2c446136b8b757d- 1Wattsfalse
- 2Jouletrue
- 3Newtonfalse
- 4amperefalse
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Answer : 2. "Joule"
Q: The method of transmission of heat is-
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5f8fcfb67793eb35d72651bc- 1Conductionfalse
- 2Convectionfalse
- 3Radiationfalse
- 4All of thesetrue
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Answer : 4. "All of these"
Q: Who found an empirical relationship between the half-life of alpha decay and the energy of the emitted alpha particles in 1911?
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649a9fbcc7d7c7e0672ba384- 1Fermi and Meitnerfalse
- 2Geiger and Nuttalltrue
- 3Chadwick and Lawrencefalse
- 4Soddy and Astonfalse
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Answer : 2. "Geiger and Nuttall "
Explanation :
In 1911, Geiger and Nuttall discovered an empirical relationship between the half-life of alpha decay and the energy of the emitted alpha particles.
Q: Polar satellites are used for high-resolution imaging of the earth’s surface because _____
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63c7c166bd6d9033208efbdf- 1They have better camerasfalse
- 2They are very high above the surface of the earth and travel slowly to gather more informationfalse
- 3They are closer to the surface of the earth and can cover vast areas very quicklytrue
- 4They can be launched by most countries in the worldfalse
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Answer : 3. "They are closer to the surface of the earth and can cover vast areas very quickly"
Explanation :
Explanation: Since polar satellites orbit close to the surface of the earth, it is easier to click images of the planet's surface with greater detail. Their high orbital velocity enables them to view most of the surface strip-by-stip very quickly with which high-resolution images can be constructed.
Q: Archimedes' law is related to which of the following?
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6137378d2421ea1e0c7db283- 1Law of Gravityfalse
- 2Law of right angled trianglefalse
- 3Law of Flotationtrue
- 4none of thesefalse
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Answer : 3. "Law of Flotation"
Q: Pressure is measured in terms of
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6066cbdb2b4b7e646bfc893a- 1Mass and Densityfalse
- 2Work donefalse
- 3Force and Areatrue
- 4Force and Distancefalse
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Answer : 3. "Force and Area"
Q: Mechanical energy is the sum of potential energy and ______ energy.
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64c22eccd3a6d4481eebda27- 1kinetictrue
- 2heatfalse
- 3electricalfalse
- 4chemicalfalse
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Answer : 1. "kinetic"
Explanation :
1. Mechanical energy is a combination of kinetic energy and potential energy.
2. Mechanical energy is defined as the sum of kinetic energy and potential energy used to do work on an object.
3. Mechanical energy is the form of energy that is related to the position and motion of an object.
Q: Which of the people with myopia has glasses?
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5fe41ccd438750744e3258ef- 1convex lensfalse
- 2concave lenstrue
- 3Bifocal lensfalse
- 4cylindrical lensfalse
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