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- Question
A standing wave occurs when
Options- A. a wave reflects upon itself
- B. the amplitude of a wave exceeds its wavelength
- C. two waves overlap
- D. the speed of the wave is zero or near zero
- Correct Answer
- a wave reflects upon itself
ExplanationA standing wave also known as a stationary wave, is a wave in which its peaks or any other point on the wave do not move spatially.
This phenomenon can occur because the medium is moving in the opposite direction to the wave, or it can arise in a stationary medium as a result of interference between two waves traveling in opposite directions. The most common cause of standing waves is the phenomenon of resonance, in which standing waves occur inside a resonator due to interference between waves reflected back and forth at the resonator's resonant frequency.
Hence, standing wave occurs when a wave reflects upon itself.
- 1. Two bulbs are fitted in a room in the domestic electric installation. One of them glows brighter than the other. Then
Options- A. the brighter bulb has smaller resistance
- B. the brighter bulb has larger resistance
- C. both the bulbs have the same resistance
- D. none of these Discuss
- 2. Heat is associated with
Options- A. K.E of random motion of molecules
- B. K.E of orderly motion of molecules
- C. Total K.E of random and orderly motion of molecules
- D. None of these Discuss
- 3. If a band is played on the moon the sound will
Options- A. reverberate
- B. be heard by us faintly
- C. be heard upto 10 km from it
- D. not be heard at any distance at all from it Discuss
- 4. When a steel ball is placed on the surface of mercury, it does not sink because
Options- A. of the surface tension of mercury
- B. mercury is a semisolid
- C. of the high viscosity of mercury
- D. the density of mercury is greater than that of steel Discuss
- 5. A body given with an initial velocity moved under the effect of gravity is called? Discuss
- 6. The amount of water vapor in the air is
Options- A. Hot air
- B. Humidity
- C. Dew
- D. Foam Discuss
- 7. If a barometric reading is falling, this usually indicates what
Options- A. Increasing pressure
- B. Decreasing pressure
- C. No pressure
- D. None Discuss
- 8. Which of the following is Not a form of Energy?
Options- A. Heat
- B. Sound
- C. Motion
- D. Pressure Discuss
- 9. Which of the following uses a Non Renewable Energy Source?
Options- A. Wind Mill Power Plant
- B. Hydro Electric Plant
- C. Nuclear Power Plant
- D. Tidal Power Plant Discuss
- 10. A Step-Up Transformer Increases
Options- A. Power
- B. Current
- C. Frequency
- D. Voltage Discuss
Physics problems
Search Results
Correct Answer: the brighter bulb has smaller resistance
Correct Answer: K.E of random motion of molecules
Correct Answer: not be heard at any distance at all from it
Explanation:
As there is no atmosphere surrounding the moon, the second from any band that is played there cannot travel outwards there is no material medium surrounding if for its propagation.
Correct Answer: the density of mercury is greater than that of steel
Explanation:
A solid sinks in a liquid if its density is greater than that of the liquid. if less, it floats
Correct Answer: Projectile
Correct Answer: Humidity
Explanation:
The amount of water vapor ranges from a trace amount up to 4% of the mass of air. Water vapor exists as an invisible gas in the air.
The amount of water vapor in the air is called absolute humidity. The amount of water vapor in the air as compared with the amount of water that the air could hold is called relative humidity.
The maximum amount of water vapor that can be in the air depends on the air temperature.
Correct Answer: Decreasing pressure
Explanation:
A barometer is a tool that measures air pressure
A rising barometer indicates increasing air pressure, a falling barometer indicates decreasing air pressure.
In space, there is a nearly complete vacuum, so the air pressure is zero.
Correct Answer: Pressure
Explanation:
Pressure is Not a form of Energy.
Energy : It is defined as the ability to do work.
Energy comes in two basic forms. They are :
1. Potential Energy
2. Kinetic Energy
Potential Energy is any type of stored energy. It can be chemical, nuclear, gravitational, or mechanical.
Kinetic Energy is found in movement. An airplane flying or a meteor plummeting each have kinetic energy. Even the tiniest things have kinetic energy, like atoms vibrating when they are hot or when they transmit sound waves. Electricity is the kinetic energy of flowing electrons between atoms.
Correct Answer: Nuclear Power Plant
Explanation:
Nuclear Power Plant uses a Non Renewable Energy Source.
Non-renewable energy is that source of energy which can not be used again and again. This sort of energy is sustainable to exhaustion.
Non renewable energy is that form of energy which is subject to deletion. This type of energy is of many uses to us. It can be used to produce electricity, heating, cooking, transportation and manufacturing. 85% of the energy used in the industrial processes is form the non-renewable type of energy.
Correct Answer: Voltage
Explanation:
A transformer that increases voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a Step-Up Transformer.
Conversely, a transformer designed to do just the opposite is called a Step-Down Transformer.
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