Discussion
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- Question
The focal length of a concave mirror with a radius of curvature of 20.0 cm is :
Options- A. 20 cm
- B. 5 cm
- C. 10 cm
- D. 15 cm
- Correct Answer
- 10 cm
- 1. If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is:
Options- A. concave mirror
- B. convex mirror
- C. plano-concave mirror
- D. plane mirror Discuss
- 2. Which of the following never occurs singly in nature?
Options- A. Inertia
- B. Momentum
- C. Force
- D. Velocity Discuss
- 3. The resistance of a conductor is inversely proportional to its:
Options- A. length
- B. resistivity
- C. temperature
- D. area of cross section Discuss
- 4. To convert temperature from Celcius to Kelvin scale, you must ___ the given temperature.
Options- A. subtract 273
- B. multiply 273
- C. add 273
- D. divide by 273 Discuss
- 5. A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be____.
Options- A. 50J
- B. 30J
- C. 20J
- D. 40J Discuss
- 6. A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/sq.s)
Options- A. 0J
- B. 200J
- C. 400J
- D. 100J Discuss
- 7. A car accelerates uniformly from 18 kmph to 72 kmph in 5 s. The acceleration of the car (in m/sq.s) is:
Options- A. 3
- B. 5
- C. 6
- D. 7 Discuss
- 8. Bending of light rays in denser medium is termed as:
Options- A. Reflection
- B. Dispersion
- C. Refraction
- D. Deflection Discuss
- 9. When a constant force acts on an object with a mass of 8 kg for a duration of 3 s. it increases the object's velocity from 4 m/s to 6 m/s . What is the magnitude of the applied force?
Options- A. 5.33 N
- B. 4.33 N
- C. 6.33 N
- D. 3.33 N Discuss
- 10. An object of 10 kg is moving with a speed of 2 m/s. The kinetic energy of the object is
Options- A. 20 J
- B. 25 J
- C. 10 J
- D. 40 J Discuss
Physics problems
Search Results
Correct Answer: convex mirror
Correct Answer: Force
Correct Answer: area of cross section
Correct Answer: add 273
Correct Answer: 50J
Correct Answer: 0J
Correct Answer: 3
Correct Answer: Refraction
Correct Answer: 5.33 N
Correct Answer: 20 J
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