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- Question
Which is the weakest force in the universe?
- Correct Answer
- Gravitational Force
- 1. Scalar Quantities are
Options- A. physical quantities which have magnitude only and no direction
- B. physical quantities which have no magnitude only and only direction
- C. physical quantities which have magnitude only and direction
- D. physical quantities which have no magnitude and no direction Discuss
- 2. A cyclist leans inwards when he is negotiating a curve so that
Options- A. he may increase his speed
- B. his weight may be reduced
- C. necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.
- D. no frictional force may be produced between the wheels and the axle Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. A projectile launched at____ degree angle has the greatest range? Discuss
- 7. 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
- 8. Nuclear Fission is caused by the impact of
Options- A. Electron
- B. Neutron
- C. Proton
- D. Deutron Discuss
- 9. Which is an example of Phototropism?
Options- A. roots of a plant following water
- B. plant bending toward the light
- C. roots growing into the soil
- D. a venus flytrap capturing a fly Discuss
- 10. What type of lens is a magnifying glass?
Options- A. Diverging
- B. Spherical
- C. Converging
- D. Achromatic Discuss
Physics problems
Search Results
Correct Answer: physical quantities which have magnitude only and no direction
Correct Answer: necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.
Explanation:
No circular or curved motion is possible without providing the necessary centripetal force. (C) provides this and so is the answer.
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.
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: Spectrum of an oil frame
Explanation:
Spectrum of an oil frame is an example for continuous emission spectrum
Correct Answer: 45
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
Correct Answer: Neutron
Explanation:
In nuclear physics, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and releases a very large amount of energy.
Thus, The Nuclear Fission is caused by the impact of Neutrons.
Correct Answer: plant bending toward the light
Explanation:
Phototropism is the ability of a photosynthesizing organism, to grow directionally in response to a light source. It is very common in plants, but can also occur in other organisms such as fungi.
Example :: Sunflower
Correct Answer: Converging
Explanation:
A magnifying glass is a convex lens that is used to produce a magnified image of an object. It is also called a hand lens in laboratory contexts.
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