Physics problems
- 1. An object that has kinetic energy must be
Options- A. At an elevated position
- B. Falling
- C. At rest
- D. Moving Also asked in: AIEEE, Bank Exams, CAT, GATE, GRE, Analyst, Bank Clerk, Bank PO
Correct Answer: Moving
Explanation:
In physics, we know that the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
Hence, An object that has kinetic energy must be in motion i.e, moving.
- 2. Lens is made up of which glass
Options- A. Ordinary glass
- B. Pyrex glass
- C. Flint glass
- D. Cobalt glass Also asked in: AIEEE, Bank Exams, CAT, GATE, GRE, Analyst, Bank Clerk, Bank PO
Correct Answer: Flint glass
- 3. What is the difference between Thermal Energy and Heat Energy? Also asked in: Bank Clerk
Correct Answer: Energy tranfer takes place either by means of Heat or Work only in Thermodynamics Heat :: Heat Energy is defined as Energy that can be transferred due to temperature change Whereas Thermal Energy :: Thermal Energy is the Internal Energy stored in the system maintained at a certain Temperature
- 4. Is B2+ Paramagnetic or Diamagnetic? Also asked in: Analyst, Bank Clerk, Bank PO
Correct Answer: B2+ is a Paramagnetic The filled orbitals are ?(1s)2 2, ??(1s)2 2, ?(2s)2 2, ??(2s)2 2 The half-filled orbitals are ?(2px x) and ?(2py y) Since it posses 2 unpaired electrons, it is Paramagnetic in nature
- 5. Electrical Pressure is also called
Options- A. Current
- B. Voltage
- C. Resistance
- D. Power Also asked in: GRE, GATE, CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst
Correct Answer: Voltage
Explanation:
Electrical Pressure is also called as Voltage. Voltage is measured in Volts.
Volt : A unit of electrical pressure or Voltage is called Volt.
One volt is the amount of pressure required to cause one ampere of current to flow against one ohm of resistance.
Voltage is also referred to as Electromotive Force or Electrical Potential or Electrical Pressure.
- 6. Friction can be reduced by changing from
Options- A. Static to Dynamic
- B. Rolling to Sliding
- C. Dynamic to Static
- D. Sliding to Rolling Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank PO
Correct Answer: Sliding to Rolling
Explanation:
Any object rolls when there is no friction. So, Sliding to Rolling is correct.
- 7. Which metal is the best conductor of heat?
Options- A. Silver
- B. Gold
- C. Copper
- 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:
Silver is the best conductor of both heat and electricity among metals with a thermal conduction value of about 430 W/(mK).
Gold and copper both come respectably close to silver.
Copper being significantly less costly it is often chosen over silver in many applications.
- 8. Light year is a unit of
Options- A. time
- B. speed of light
- C. distance
- D. mass Discuss
Correct Answer: distance
- 9. Why does'nt the hydrogen atom emit X-rays?
Options- A. It is very small in size
- B. It has only one electron
- C. Its energy levels are very close to each other
- D. it is highly electropositive Discuss
Correct Answer: Its energy levels are very close to each other
Explanation:
For an atom to emit X-rays it should have difference in energy levels
- 10. Which of the following is a scalar quantity
Options- A. Displacement
- B. Electric field
- C. Acceleration
- D. work Discuss
Correct Answer: work
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