Physics Practice MCQ Page 15
Multiple Choice questions for Physics in the sets of 10 each on one page with questions and answers. All sets are useful in the preparation of subject tests for employment or admission.
Question: 445 The radius of the circular path of a charge particle moving at right angles to a uniform magnetic field is directly proportional to the
- momentum of the particle
- flux density
- wave length of ht radiation
- charge on the particle
Question: 446 Choose the correct statement
- Joule's effect is reversible but Peltier's effect is irreversible
- Joule's effect is irreversible but Peltier's effect is reversible
- Both Joule's effect and Peltier's effect are reversible
- Both Joule's effect and Peltier's effect are reversible
Question: 447 Lagging of magnetic flux density behind magnetic field is known as
- paramagnetism
- diamagnetism
- susceptibility
- hysteresis
Question: 448 If an electron drops from the 7.9 eV level, it
- gains 2.9 eV of kinetic energy
- gains 2.9 eV of potential energy
- emits a 2.9 eV photon
- emits a 2.9 eV electron
Question: 449 In order to explain the fine structure of the spectrum of the hydrogen atom we must take
- Orbital angular momentum
- Spin angular momentum
- The presence of neutrons in the nucleus
- Finite size of nucleus
Question: 450 The existence of sharp lines in the spectrum of a gas indicates that
- electrons orbit at certain frequencies only
- electrons emit energy in small, indivisible packets
- the nucleus has certain discrete energy levels
- light exists in photons
Question: 451 the concept of an atom with quantized energy levels was introduced by
- Raman
- Bohr
- Newton
- Fermi
Question: 452 Which of the following is established by Bragg's Method?
- X-rays can neither be diffracted nor deflected by electric and magnetic fields
- X-rays are not electromagnetic in nature
- X-rays are electromagnetic in nature and can be diffracted
- X-rays are electromagnetic in nature and can be deflected
Question: 453 Protons are accelerated in one step by the kind of accelerator called a
- Van de Graaff Generator
- Cyclotron
- Spark chamber
- Linear accelerator
Question: 454 Kadiocarbon is produced in the atmosphere by the bombardment of
- Oxygen by high energy neutrons
- Oxygen by high energy protons
- Nitrogen by high energy protons
- Nitrogen by high energy neutrons
Question: 455 Kadiocarbon is produced in the atmosphere by the bombardment of
- Oxygen by high energy neutrons
- Oxygen by high energy protons
- Nitrogen by high energy protons
- Nitrogen by high energy neutrons
Question: 456 If, in a nuclear fission reaction involving neutron capture, the multiplication factor is greater than 1, then
- the process will ultimately come to a halt
- an explosion may result
- the reaction will be self sustaining with no explosion possible
- it is impossible to predict whether the reaction will halt or continue
Answers to the questions of Physics on this page
Following list gives the correct choice for the answer of the Physics mcqs.
445 . A
446 . D
447 . D
448 . C
449 . B
450 . B
451 . B
452 . C
453 . D
454 . D
455 . D
456 . B
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