Physics Practice Question and Answer
8 Q: We have reason to see the sun a few minutes before the actual sunrise
1034 05f72e901c0afea20a178e18c
5f72e901c0afea20a178e18c- 1Scattering of lightfalse
- 2Diffraction of lightfalse
- 3Total internal reflection of lightfalse
- 4Refraction of lighttrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "Refraction of light"
Q: An object weights the maximum in:
1032 061655a8fd881f96172321665
61655a8fd881f96172321665- 1Hydrogenfalse
- 2Vacuumtrue
- 3Airfalse
- 4Waterfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "Vacuum "
Q: Most waves used for communication purposes rely on geostationary satellites because _____
1030 063c7baad1c47ef334bdd8984
63c7baad1c47ef334bdd8984- 1They cannot transmit data at long distances due to curvature of the earthtrue
- 2They are reflected by the atmospherefalse
- 3They are very cheapfalse
- 4It does not occupy space on the earth’s surfacefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "They cannot transmit data at long distances due to curvature of the earth"
Explanation :
Explanation: Most communication waves cannot transmit data accurately over long distances due to the curvature of the earth. They can only do so in the line of sight. However, they are not reflected by the ionosphere like radio waves and can be relayed to a wide area using geostationary satellites.
Q: An object of mass 13 kg is moving with a uniform velocity of 5 ms-1. What is the kinetic energy possessed by the object?
1026 060826bbf60a06a7ffdaa7336
60826bbf60a06a7ffdaa7336- 1187.5 Jfalse
- 217.5 Jfalse
- 3162.5 Jtrue
- 4162.5 msfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "162.5 J"
Q: The power of a lens is -2.0 D. Here ‘D’ stands for ________.
1019 060ffbd12d984302df240ac39
60ffbd12d984302df240ac39- 1distancefalse
- 2dilationfalse
- 3dioptretrue
- 4degreefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "dioptre"
Q: Planetary scientists call the thin gaseous envelope around the Moon as the _______.
1017 062bece2d1d322d793f53ca68
62bece2d1d322d793f53ca68- 1lunar stratospherefalse
- 2lunar exospheretrue
- 3lunar endospherefalse
- 4lunar thermospherefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "lunar exosphere "
Q: What does pupil come in bright light?
1012 05fe423549f9e9d787c92d003
5fe423549f9e9d787c92d003- 1bigfalse
- 2smalltrue
- 3No changefalse
- 4None of thesefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "small"
Q: What is the degree of dissociation for strong electrolytes?
1011 063c7ccbc8731ac33279b21f7
63c7ccbc8731ac33279b21f7- 11true
- 20false
- 3Less than 1false
- 4Greater than 1false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "1"
Explanation :
Strong electrolytes have a degree of dissociation close to one, while weak electrolytes have a degree of dissociation less than one. Solvent nature: Solvents with a high dielectric constant show more dissociation. Dilution: As the solution is diluted, the degree of dissociation increases.