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- Question
When body is accelerated--
Options- A. Its velocity never changes.
- B. Its speed will always change.
- C. Its direction always changes.
- D. Its speed may or may not change.
- Correct Answer
- Its speed may or may not change.
ExplanationUniform circular motion, that is constant speed along a circular path, is an example of a body experiencing acceleration resulting in velocity of a constant magnitude but the change of direction
- 1. Which of the following device is best suited for measuring the temperature inside metallurgical furnaces?
Options- A. Pyrometer
- B. Thermocouple
- C. Thermometer
- D. Thermistor Discuss
- 2. Weight of a body is maximum at the:
Options- A. Equator
- B. Pole
- C. Subtropics
- D. Tropics Discuss
- 3. The increasing order of the refractive index of certain materials is (left to right) .......
Options- A. Rocksalt, Benzene, Kerosene, Ice
- B. Rock Salt, Ice, Benzene, Kerosene
- C. Ice, Kerosene, Benzene, Rock Salt
- D. Kerosene, Ice, Benzene, Rock Salt Discuss
- 4. Rate of change of momentum is
Options- A. Area
- B. Pressure
- C. Force
- D. Velocity Discuss
- 5. For every action, there is an equal and opposite reaction, is Newton's
Options- A. First law
- B. Second law
- C. Third law
- D. Fourth law Discuss
- 6. The spring constant of a spring depends on its
Options- A. length only
- B. material only
- C. length and its diameter
- D. thickness, its diameter and its material Discuss
- 7. Which of the following is not a vector quantity?
Options- A. Acceleration
- B. Electric current
- C. Force
- D. Velocity Discuss
- 8. Which of the following represents a relation for ?heat lost = heat gained??
Options- A. Principle of thermal equilibrium
- B. Principle of colors
- C. Principle of calorimetry
- D. Principle of vaporization Discuss
- 9. The reverse effect of X-ray emission is
Options- A. Raman effect
- B. Compton effect
- C. Zeeman effect
- D. Photo-electric effect Discuss
- 10. Convex mirror is generally used in _____.
Options- A. solar cookers
- B. opthalmoscope
- C. reflector for head light
- D. rear view mirror Discuss
Physics problems
Search Results
Correct Answer: Pyrometer
Correct Answer: Pole
Correct Answer: Ice, Kerosene, Benzene, Rock Salt
Correct Answer: Force
Correct Answer: Third law
Correct Answer: thickness, its diameter and its material
Explanation:
In dealing with a coil spring the spring constant will depend on the stiffness of the spring material, the thicknessof the wire from which the spring is wound and, diameterof the turns of the coil, the number of turns per unit length and the overall length of the spring.
Correct Answer: Electric current
Correct Answer: Principle of calorimetry
Explanation:
Heat lost by hot object = Heat gained by cold object
where we ignore heat gained or lost from/to the surroundings.
The study of heat gained and lost in this manner is often called Calorimetry.
Correct Answer: Photo-electric effect
Correct Answer: rear view mirror
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