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- Question
Which type of radiation has the lowest penetrating ability?
Options- A. Alpha
- B. Beta
- C. Gamma
- D. All of the above
- Correct Answer
- Alpha
ExplanationIn order of increasing penetration power, alpha particles have the lowest, then beta particles, then gamma rays.
- 1. The energy associated with motion is called
Options- A. Potential energy
- B. Kinetic energy
- C. Both A & B
- D. Stored energy Discuss
- 2. Electric current is measured by which instrument?
Options- A. voltmeter
- B. ammeter
- C. barometer
- D. sinometer Discuss
- 3. What device converts light energy to electrical energy?
Options- A. Photodiode
- B. Photovoltaic cell
- C. Thermocouple
- D. Heliostats Discuss
- 4. Thermoplastic materials are those materials which
Options- A. Do not become hard with the application of heat and pressure and no chemical change occurs
- B. Are flexible and can withstand considerable wear under suitable conditions
- C. Are formed into shape under heat and pressure and results in a permanently hard product
- D. Are used as a friction lining for clutches and brakes Discuss
- polyethylene,
- polypropylene,
- polyvinyl chloride,
- polystyrene,
- polybenzimidazole,
- acrylic,
- nylon and
- teflon
- 5. Low voltage cables are meant for use up to
Options- A. 3.3 kV
- B. 1.1kV
- C. 11 kV
- D. 0.5 kV Discuss
- 6. Electrical burns occur principally because of
Options- A. Radiation pulses of the electricity
- B. The heat generated by the flow of electrical current through the body
- C. The high energy of electrons
- D. All of the above Discuss
- 7. Gamma rays are emanations that have
Options- A. charge but no mass
- B. neither mass nor charge
- C. both mass and charge
- D. mass but no charge Discuss
- 8. The force that generates wind is
Options- A. Gravity force
- B. Pressure gradient force
- C. Coriolis force
- D. Centrifugal force Discuss
- 9. A doppler effect occurs when a source of sound moves
Options- A. away from you
- B. towards you
- C. Both A & B
- D. None of the above Discuss
- 10. Kilohertz is a unit which measures
Options- A. Electromagnetic radio wave frequencies
- B. Electric resistance
- C. Power used by a current of one ampere
- D. Voltage Discuss
Physics problems
Search Results
Correct Answer: Kinetic energy
Explanation:
Energy can be either potential or kinetic. The energy associated with motion is called Kinetic energy and similarly, the energy associated with position is called Potential energy.
Correct Answer: ammeter
Correct Answer: Photovoltaic cell
Correct Answer: Do not become hard with the application of heat and pressure and no chemical change occurs
Explanation:
Thermoplastic materials is a type of plastic material that can be cooled and heated several times without any change in their chemistry or mechanical properties.
Examples of Thermoplastic ::
Correct Answer: 1.1kV
Correct Answer: The heat generated by the flow of electrical current through the body
Explanation:
Electrical burns occur principally because of the heat generated by the flow of electrical current through the body.
Burns caused by electricity are divided into three types:
electrical burns,
arc burns, and
thermal contact burns.
Electrical burns can result when a person touches electrical wiring or equipment that is used or maintained improperly.
Correct Answer: neither mass nor charge
Explanation:
A gamma ray or gamma radiation, is a penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves and so imparts the highest photon energy.
Gamma rays are emanations that have neither mass nor charge.
Correct Answer: Pressure gradient force
Explanation:
Wind is the flow of gases on a large scale. On the surface of the Earth, wind consists of the bulk movement of air. The force that generates wind is called as Pressure gradient force.
Correct Answer: Both A & B
Correct Answer: Electromagnetic radio wave frequencies
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