Discussion
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- Question
Why does a cannon recoil after firing ?
Options- A. Conservation of energy
- B. Backward thrust of gases produced
- C. Newton's third law of motion
- D. Newton's first law of motion
- Correct Answer
- Newton's third law of motion
- 1. The phenomenon of change in direction of light when it passes from one medium to another is called
Options- A. Propagation
- B. Reflection
- C. Refraction
- D. Dispersion Discuss
- 2. 'Parsec' is the unit measurement of
Options- A. Density of stars
- B. Astronomical distance
- C. Brightness of heavenly bodies
- D. Orbital velocity of giant stars Discuss
- 3. At boiling point of liquids , its
Options- A. Temperature increases
- B. Atmospheric pressure increases
- C. Temperature remains constant
- D. Vapour pressure decreases Discuss
- 4. Why the Earth is having its own atmosphere ?
Options- A. Winds
- B. Clouds
- C. Gravity
- D. Rotation of the Earth Discuss
- 5. What is the name of the device used to convert alternating current into direct current ?
Options- A. Ammeter
- B. Galvanometer
- C. Rectifier
- D. Transformer Discuss
- 6. What type of force acts on a car moving around a curve?
Options- A. Centrifugal force
- B. Cohesive force
- C. Centripetal force
- D. Gravitational force Discuss
- 7. Which phenomenon is responsible for the echo of sound wave?
Options- A. Reflection
- B. Refraction
- C. Interference
- D. Polarisation Discuss
- 8. If an object moves in a circular path with uniform ________, its motion is called uniform circular motion.
Options- A. speed
- B. Time
- C. Velocity
- D. Acceleration Discuss
- 9. The reflection formed by the plane mirror is ________________.
Options- A. vertical inversion
- B. a real image
- C. lateral inversion
- D. an enlarged image Discuss
- 10. Convex and concave mirrors are examples of?
Options- A. Plane mirrors
- B. Spherical mirrors
- C. Inverted mirror
- D. Erect mirror Discuss
Physics problems
Search Results
Correct Answer: Refraction
Correct Answer: Astronomical distance
Correct Answer: Temperature remains constant
Correct Answer: Gravity
Correct Answer: Rectifier
Correct Answer: Centripetal force
Explanation:
It is a force that acts on a body moving in a circular path and is directed towards the centre around which the body is moving is called as Centripetal force.
Correct Answer: Reflection
Correct Answer: speed
Correct Answer: lateral inversion
Correct Answer: Spherical mirrors
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