Physics problems
- 1. Megahertz is a measurement of
Options- A. Frequency
- B. Speed
- C. Wavelength
- D. Capacity Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Frequency
- 2. General purpose utility gloves are
Options- A. for surgeries
- B. for cleaning procedures
- C. for handling tubes
- D. All of the above Also asked in: AIEEE, Bank Exams, Analyst, Bank PO
Correct Answer: for cleaning procedures
- 3. The law of conservation of energy states that
Options- A. energy can neither be created nor destroyed
- B. energy can either be created nor destroyed
- C. energy can neither be created or destroyed
- D. energy can either be created or destroyed Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: energy can neither be created nor destroyed
Explanation:
The law of conservation of energy is a law of science which states that energy can neither be created nor destroyed - only converted from one form of energy to another.
In 1842, Julius Robert Mayer discovered the Law of Conservation of Energy.
- 4. The strength of an electromagnet can be increased by
Options- A. increasing the length of the coiled wire
- B. increasing current supply
- C. increasing the number of turns
- D. All of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: All of the above
Explanation:
The strength of an electromagnet can be increased by increasing the cross-sectional area, increasing the number of turns, increasing current supply, increasing the length of the coiled wire.
- 5. Speed of sound is maximum in which among the following?
Options- A. Gases
- B. Vaccum
- C. Liquids
- D. Solids Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Solids
Explanation:
We know that, in solids all the particles are packed together and hence sound can travel from one to one very fast.
Hence, speed of sound is maximum in solids and decreses from solids to liquids and liquids to gases. Sound can't travel through vaccum.
- 6. For Gamma radiation, what stops its penetrating abilities?
Options- A. Lead
- B. Steal
- C. Concrete
- D. All of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: All of the above
Explanation:
The highly energetic gamma particles can penetrate most compounds that stop by other types of radiation. However, lead, steel, or concrete can reduce the high energy of these particles, making them less penetrating.
Hence, Gamma radiation can be stopped by a several inches of lead or steel, or several meters of concrete.
- 7. Which of these is exhibiting kinetic energy?
Options- A. an archer with a flexed bow
- B. a person sitting on a couch while watching TV
- C. a space station orbiting Earth
- D. All of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: a space station orbiting Earth
Explanation:
Any moving object can exhibit kinetic energy, as kinetic energy is also known as Motional energy.
In the given options, only a space station orbiting Earth is in motion and all the other are in rest position.
Hence, option C) a space station orbiting Earth is only exhibiting kinetic energy.
- 8. Slip rings are usually made of
Options- A. Aluminium
- B. Copper
- C. Phosphor Bronze
- D. Carbon Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Phosphor Bronze
- 9. An ideal gas cannot be
Options- A. liquified
- B. solidified
- C. Both A & B
- D. None of the above Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: liquified
Explanation:
An ideal gas cannot be liquified because forces between the molecules are negligible.
- 10. Which of these is true of all simple machines?
Options- A. these make work easier
- B. work input > work output
- C. Both A & B
- D. None of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Both A & B
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