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- Question
The reverse effect of X-ray emission is
Options- A. Raman effect
- B. Compton effect
- C. Zeeman effect
- D. Photo-electric effect
- Correct Answer
- Photo-electric effect
- 1. 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
- 2. Which of the following is not a vector quantity?
Options- A. Acceleration
- B. Electric current
- C. Force
- D. Velocity Discuss
- 3. 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
- 4. 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. Discuss
- 5. 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
- 6. Convex mirror is generally used in _____.
Options- A. solar cookers
- B. opthalmoscope
- C. reflector for head light
- D. rear view mirror Discuss
- 7. What is the SI unit of frequency?
Options- A. Newton
- B. Watt
- C. Farad
- D. Hertz Discuss
- 8. What is the SI unit of electric current?
Options- A. Newton
- B. Joule
- C. Ampere
- D. Watt Discuss
- 9. If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?
Options- A. Concave
- B. Convex
- C. Cylindrical
- D. Plane Discuss
- 10. Soap bubble attains spherical shape due to ______.
Options- A. inertia
- B. pressure
- C. surface tension
- D. Viscosity Discuss
Physics problems
Search Results
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: Electric current
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: Its speed may or may not change.
Explanation:
Uniform 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
Correct Answer: Pyrometer
Correct Answer: rear view mirror
Correct Answer: Hertz
Correct Answer: Ampere
Correct Answer: Concave
Correct Answer: surface tension
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