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- Question
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
- Correct Answer
- remains the same
ExplanationBefore 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
- 1. A projectile launched at____ degree angle has the greatest range? Discuss
- 2. Which is the weakest force in the universe? Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. Nuclear Fission is caused by the impact of
Options- A. Electron
- B. Neutron
- C. Proton
- D. Deutron Discuss
- 7. 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
- 8. What type of lens is a magnifying glass?
Options- A. Diverging
- B. Spherical
- C. Converging
- D. Achromatic Discuss
- 9. The heat from the sun reaches earth through Convection.
Options- A. TRUE
- B. FALSE Discuss
- 10. Microwave communication uses high-frequency.
Options- A. TRUE
- B. FALSE Discuss
Physics problems
Search Results
Correct Answer: 45
Correct Answer: Gravitational Force
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: 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.
Correct Answer: FALSE
Explanation:
The given statement, The heat from the sun reaches earth through Convection is FALSE.
Heat from the sun actually reaches the earth through Radiation. The process occurs through electromagnetic radiation, specifically, in which molecules are warmed when the heat reaches them, and these molecules then warm other molecules touching them, which continues until we feel the sun's heat.
Correct Answer: TRUE
Explanation:
Microwaves are high-frequency signals in the 300 MHz to 300 GHz range. This is in contrast to radio signals, which are typically broadcast in all directions. Radio signals operate in the 3 Hz to 300 MHz range.
Microwave signals are used for both satellite and ground-based communications.
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