Discussion
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- Question
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
- Correct Answer
- add 273
- 1. 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
- 2. An object with a mass of 22 kg moving with a velocity of 5 m/s possesses a kinetic energy of :
Options- A. 275 J
- B. 110 J
- C. 2750 J
- D. 110 J Discuss
- 3. Find the current (in A) when a charge of 1200C flows in 6 seconds.
Options- A. 7200
- B. 200
- C. 100
- D. 3600 Discuss
- 4. Skids occur when the brakes are applied so hard that the front or rear wheels lose traction are called as
Options- A. Cornering
- B. BLowout
- C. Power
- D. Braking Discuss
- 5. In order to make an electromagnet you need a
Options- A. Dry cell batteries
- B. Thin coated copper wire
- C. Iron nail
- D. All of the above Discuss
- 6. The resistance of a conductor is inversely proportional to its:
Options- A. length
- B. resistivity
- C. temperature
- D. area of cross section Discuss
- 7. Which of the following never occurs singly in nature?
Options- A. Inertia
- B. Momentum
- C. Force
- D. Velocity Discuss
- 8. 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
- 9. 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 Discuss
- 10. 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
Physics problems
Search Results
Correct Answer: 50J
Correct Answer: 275 J
Correct Answer: 200
Correct Answer: Braking
Correct Answer: All of the above
Explanation:
To create a simple electromagnet, you'll need a source of electricity, a conductor, and metal. Wrap insulated copper wire tightly around an iron screw or nail before connecting the wire to a battery, and watch as your new electromagnet picks up small metal objects.
Correct Answer: area of cross section
Correct Answer: Force
Correct Answer: convex mirror
Correct Answer: 10 cm
Correct Answer: 0J
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