Physics Practice MCQ Page 30
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: 3528 Three capacitors 2.0, 3.0 and 6.0 microfarads are connected in series to a 10 volt source. The charge on the middle is
- 5 micro coulomb
- 10 micro coulomb
- 11 micro coulomb
- 15 micro coulomb
Question: 3529 Light is polarized to the maximum, when a light is incident on a glass surface at an angle of
- 57°
- 67°
- 47°
- 37°
Question: 3531 Two bulbs, one of 50 watts and another of 25 watts are connected in series tot he main. The current
- through the 50 watt bulb is more
- through the 25 watt bulb is more
- through the 50 watt bulb is more in first half cycle of the AC mains and less in the second half cycle
- is the same in the two bulbs
Question: 3533 An inductance has a high resistance to AC and low D.C. When DC voltage source having some AC components superimposed on it send current through an inductance to load resistance
- there is an appreciable fall in DC voltage across the load and there is only a small fall in A.C components
- there is an appreciable fall in A.C. voltage across the load and there is only a small fall in D.C. voltage
- Both A.C. and D.C voltage fall by same small percentage
- both A.C. and D.c voltage fall to nearly zero
Question: 3538 Neutral temperature for a thermocouple is defined as the temperature at which
- the thermo e.m.f changes sign
- the thermo e.m.f is maximum
- the thermo e.m.f is minimum
- the thermo current is maximum
Question: 3540 Ampere's law is concerned with
- the force on a wire carrying a current in a magnetic field
- electro-chemical equivalent
- unit magnetic poles
- r.m.s values
Question: 3542 A bar of tube of ferromagnetic material changes in length when it is placed in a strong magnetic field perpendicular to its lengths
- true
- false
- uncertain
- none of these
Question: 3543 The ratio of the energies of the hydrogen atom in its first to second excited state is
- 1/4
- 2/3
- 4/9
- 4
Question: 3544 The ratio of the radii of the electron orbiting around the nucleus of a hydrogen atom in the first two orbits is 1:4. The ratio of the time required to complete first orbit to that required to complete the second orbit is
- 1:8
- 8:1
- 1:1
- 1:2
Question: 3546 The angular speed of an electron in the nth orbit of Bohr's hydrogen atom is
- directly proportional to n
- directly proportional to n2
- inversely proportional n2
- inversely proportional n
Question: 3547 There is a constant ratio between the kinetic energy and total energy of an electron in an atom of hydrogen according to Bohr's model. This ratio is
- 1:-1
- 1:1
- 1:2
- 2:1
Question: 3549 Which of the following can be used as an arrester in a nuclear reactor?
- Graphite
- Heavy water
- uranium
- cadmium
Answers to the questions of Physics on this page
Following list gives the correct choice for the answer of the Physics mcqs.
3528 . B
3529 . A
3531 . A
3533 . A
3538 . A
3540 . A
3542 . B
3543 . D
3544 . B
3546 . C
3547 . A
3549 . D
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