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- Question
Intensity of sound at a point is ____ its distance from the source.
Options- A. directly proportional to
- B. inversely proportional to
- C. directly proportional to square of
- D. inversely proportional to square of
- Correct Answer
- inversely proportional to square of
- 1. Planets are
Options- A. luminous heavenly bodies revolving around a star
- B. non-luminous heavenly bodies
- C. luminous heavenly bodies that twinkle
- D. luminous heavenly bodies that do not twinkle Discuss
- 2. On a rainy day, small oil films on water show brilliant colours. This is due to
Options- A. dispersion
- B. interference
- C. diffraction
- D. polarization Discuss
- 3. Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?
Options- A. 1.8 km, 0.15 km
- B. 2.2 km, 0.20 km
- C. 2.8 km, 0.25 km
- D. 3.3 km, 0.30 km Discuss
- 4. Mach number is used in connection with the speed of
Options- A. sound
- B. aircraft
- C. spacecraft
- D. ships Discuss
- 5. RADAR is used for
Options- A. locating submerged submarines
- B. receiving a signals in a radio receiver
- C. locating geostationary satellites
- D. detecting and locating the position of objects such as aeroplanes Discuss
- 6. Metals are good conductors of electricity because
Options- A. they contain free electrons
- B. the atoms are lightly packed
- C. they have high melting point
- D. All of the above Discuss
- 7. Rectifiers are used to convert
Options- A. Direct current to Alternating current
- B. Alternating current to Direct current
- C. high voltage to low voltage
- D. low voltage to high voltage Discuss
- 8. Solar eclipse will take place when
Options- A. the sun is between the moon and the earth
- B. the earth is between the moon and the sun
- C. the moon is between the sun and the earth
- D. the moon does not lie on the line joining the sun and the earth Discuss
- 9. Materials for rain-proof coats and tents owe their water-proof properties to
Options- A. surface tension
- B. viscosity
- C. specific gravity
- D. elasticity Discuss
- 10. On a stationary sail boat, air is blown from a fan attached to the boat. The boat
Options- A. moves in opposite direction in which the air is blown
- B. does not move
- C. moves in the same direction in which air blows
- D. spins around Discuss
Physics problems
Search Results
Correct Answer: non-luminous heavenly bodies
Correct Answer: interference
Correct Answer: 3.3 km, 0.30 km
Correct Answer: aircraft
Correct Answer: detecting and locating the position of objects such as aeroplanes
Correct Answer: they contain free electrons
Correct Answer: Alternating current to Direct current
Correct Answer: the moon is between the sun and the earth
Correct Answer: surface tension
Correct Answer: does not move
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