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प्रश्न
The north pole of a magnet ______ the north pole of another magnet.
उत्तर
The north pole of a magnet repels the north pole of another magnet.
Explanation:
Magnetic poles repel each other. When two north poles are brought close together, they produce a repulsive force, causing them to separate, exhibiting a fundamental property of magnetism.
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संबंधित प्रश्न
Make a match
| A group | B group |
| 1. Fluid | a. Higher pressure |
| 2. Blunt knife | b. Atmospheric pressure |
| 3. sharp needle | c. Specific gravity |
| 4. Relative density | d. Lower pressure |
| 5. Hecto pascal | e. Same pressure in all directions |
Explain giving two examples of following :
Contact forces
Two equal and opposite forces act on a moving object. How is its motion affected? Give reason.
A car initially at rest, picks up a velocity of 72 kmh−1 in 20 seconds. If the mass of the car is 1000 kg, find
- Force developed by its engine
- Distance covered by the car.
A car of mass 800 kg, moving at 54 kmh−1 is brought to rest over a distance of 15 m. Find the retarding force developed by the brakes of the car.
Multiple Choice Question. Select the correct option.
Action-reaction forces
What is a non-contact force?
In the circuit shown in figure, when the key is closed, the compass needle placed in the match box deflects. Name the force which cases this deflection.
A gas filled balloon moves up. Is the upward force acting on it larger or smaller than the force of gravity?
Fruits detached from a tree fall down due to the force of gravity. We. know, that a force arises due to the interaction between two objects. Name the objects interacting in this case.
