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- Question
SI unit of Luminious intensity is
Options- A. Lumen
- B. Lux
- C. Candela
- D. Watt
- Correct Answer
- Candela
- 1. What is the unit of resistance?
Options- A. ohm
- B. farad
- C. henry
- D. weber Discuss
- 2. Which of the following pairing is incorrect
Options- A. Hygrometer - Water vapour content of the atmosphere
- B. Lactometer - Specific gravity of liquids
- C. Anemometer - Speed of the wind
- D. Seismograph - Earthquakes Discuss
- 3. When a barometer is rising air pressure is
Options- A. increasing
- B. decreasing
- C. constant
- D. zero Discuss
- 4. Glass is made of which material?
Options- A. Calcium carbonate
- B. Sand
- C. Silver Iodide
- D. Lime Discuss
- 5. Stars are held together by
Options- A. Gravitational forces
- B. Electrical forces
- C. Ionic forces
- D. Magnetic forces Discuss
- 6. Heat energy of an object is
Options- A. the average energy of the molecules of the object
- B. the total energy of the molecules of the object
- C. the average velocity of the molecules of the object
- D. the average potential energy of the molecules of the object Discuss
- 7. What are the particles emitted by radio active element after 3 consequtive disintegrations?
Options- A. 2 alpha 1 beta
- B. 1 alpha 1 beta
- C. 2 beta 1 alpha
- D. 2 beta 2 alpha Discuss
- 8. Which of the following is an example of continous emission spectrum?
Options- A. Spectrum of an oil frame
- B. Spectrum of a water
- C. both
- D. none Discuss
- 9. Lightning is produced when
Options- A. Similar charges of electricity rush towards each other and then get repelled
- B. clouds strike against impurities in air and the friction burns up these impurities
- C. strong opposite charges in different clouds break down the resistance offered by the intervening air
- D. water vapour produces electricity in the clouds Discuss
- 10. A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left hand. If he transfers the fish into the bucket, the total weight on the pan
Options- A. increases
- B. decreases
- C. remains the same
- D. first increases and then decreases Discuss
Physics problems
Search Results
Correct Answer: ohm
Correct Answer: Lactometer - Specific gravity of liquids
Correct Answer: increasing
Explanation:
The device which is used to measure air pressure is called as barometer. If the barometer reading is rising, it indicates that the air pressure is increasing and if the reading is falling the air pressure is decreaing.
Correct Answer: Sand
Correct Answer: Gravitational forces
Correct Answer: the total energy of the molecules of the object
Correct Answer: 2 beta 1 alpha
Correct Answer: Spectrum of an oil frame
Explanation:
Spectrum of an oil frame is an example for continuous emission spectrum
Correct Answer: strong opposite charges in different clouds break down the resistance offered by the intervening air
Explanation:
When the resistance of the air between breaks down the current flows from the positive cloud to the negative cloud in a flash which we call lightning . The difference of potential involves is very high.
Correct Answer: remains the same
Explanation:
Before transferring the fish, the position is the man with the fish and the bucket of water. After transferring the position is: the man without the fish, but the fish inside the water in the bucket. Thus to know whether there is any change in weight, it is enough to consider whether there is any change in weight when the fish in air is transferred into the water. The answer is there is no change as when in water though it loses weight due to upthrust of water on it, the level of water increases and exerts an equal force at the bottom.So, (c) is correct.
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