Physics Practice Question and Answer
8 Q: We have reason to see the sun a few minutes before the actual sunrise
1293 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: The amount of work done in moving a charge of 4C across two points having a potential difference of 6V is ______.
1291 0641974a1b34a0b67fcf4a8bf
641974a1b34a0b67fcf4a8bf- 148 Jfalse
- 212 Jfalse
- 336 Jfalse
- 424 Jtrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "24 J"
Q: What does pupil come in bright light?
1290 05fe423549f9e9d787c92d003
5fe423549f9e9d787c92d003- 1bigfalse
- 2smalltrue
- 3No changefalse
- 4None of thesefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "small"
Q: What type of energy is used to perform bodily functions?
1282 060b4b0f6517f2874d53f51b2
60b4b0f6517f2874d53f51b2- 1electric energyfalse
- 2Solar energyfalse
- 3muscle energytrue
- 4Chemical energyfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "muscle energy"
Q: What is the constant of proportionality of an oscillator if the damping force is directly proportional to the velocity
1278 063c8e053bdbddb32fda05b2a
63c8e053bdbddb32fda05b2a- 1Kg.s-1true
- 2Kg.m.s-1false
- 3Kg.sfalse
- 4Kg.m.s-2false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "Kg.s-1"
Explanation :
The damping force of an oscillating particle is observed to be proportional to velocity. The constant of proportionality can be measured in. kgs−1.
Q: Which of the following laws is associated with the heating effect of electric current?
1264 06082792060a06a7ffdaa9927
6082792060a06a7ffdaa9927- 1Joule's lawtrue
- 2Ohm's lawfalse
- 3Faraday's lawfalse
- 4Newton's lawfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "Joule's law "
Q: The principle on which optical fiber works is
1263 05f746ec3a921aa16e68c3704
5f746ec3a921aa16e68c3704- 1Full internal reflectiontrue
- 2Refractionfalse
- 3Scatteringfalse
- 4Deviationfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "Full internal reflection"
Q: The induced current is the highest when the direction of motion of the coil is:
1244 064a2afe73662c8741d1a3f77
64a2afe73662c8741d1a3f77- 1not at right angles to the magnetic fieldfalse
- 2at right angles to the electricityfalse
- 3at right angles to the electric sourcefalse
- 4at right angles to the magnetic fieldtrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "at right angles to the magnetic field"
Explanation :
1. Induced current is highest when the direction of motion of the coil is perpendicular to the magnetic field.