Physics Practice Question and Answer
8 Q: In 1962, who published 'The History of Ocean Basins', which outlined the theory of how tectonic plates could move, later called 'sea floor spreading'?
1393 064b51c41efb5ba166881e176
64b51c41efb5ba166881e176- 1George Edward Backusfalse
- 2Alfred Wegenerfalse
- 3Louis Bauerfalse
- 4Harry Hammond Hesstrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "Harry Hammond Hess"
Explanation :
1. In 1962, Harry Hammond Hayes published 'The History of Ocean Basins'.
2. In this, the theory of plate tectonics was outlined and which was later also known as 'ocean bottom spreading'.
Q: Do doctors use to check patients' nose, ears, throat etc.?
1388 05f6da922f9079a64e3c0a92d
5f6da922f9079a64e3c0a92d- 1plane mirrorfalse
- 2convex mirrorfalse
- 3concave mirrortrue
- 4None of thesefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "concave mirror"
Q: Polar satellites are used for high-resolution imaging of the earth’s surface because _____
1387 063c7c166bd6d9033208efbdf
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
- Show AnswerHide Answer
- Workspace
- SingleChoice
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: Choose the correct statement
1384 063c910807efeed32fc20e26c
63c910807efeed32fc20e26c- 1A body can be accelerated by frictional forcefalse
- 2There can be zero frictionfalse
- 3Kinetic friction is greater than rolling frictiontrue
- 4Frictional force and area of contact between the two surfaces are proportionalfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "Kinetic friction is greater than rolling friction "
Q: What is the refractive index of diamond?
1383 05f6da978f9079a64e3c0a995
5f6da978f9079a64e3c0a995- 11.77false
- 21.47false
- 31.44false
- 42.42true
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "2.42"
Q: Unit of impedance is ___________.
1380 162f33bf409a97851b630c16d
62f33bf409a97851b630c16d- 1ohmtrue
- 2henryfalse
- 3teslafalse
- 4hertzfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "ohm"
Q: The instrument that measures and records the relative humidity of air is:
1378 06163f15a8c5cc30e6058a74c
6163f15a8c5cc30e6058a74c- 1Hygrometertrue
- 2Hydrometerfalse
- 3Lactometerfalse
- 4Barometerfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "Hygrometer"
Q: What type of magnet is used in commercial motors?
1378 05fe45c0c57a5647868b60225
5fe45c0c57a5647868b60225- 1Permanent magnetfalse
- 2umbilical magnetfalse
- 3electromagnettrue
- 4Common rod magnetfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice