Physics Practice MCQ Page 47

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: 4018   The angular momentum of the α-particles which are scattered through large angles by the heavier nuclei, is conserved because of the
  1. nature of the repulsive forces
  2. conservation of linear momentum
  3. conservation of kinetic energy
  4. conservation of total energy
Question: 4019   An X-ray tube is operating at 15 KV. The lower limit of the wavelength of X-rays produced is
  1. 0.82 × 10-7 m
  2. 0.82 × 10-8 m
  3. 0.82 × 10-10 m
  4. 0.82 × 10-13 m
Question: 4020   Light coming from the discharge tube filled with hydrogen falls on the cathode of the photoelectric cell. The work function of the surface of cathode is 4 eV. Which one of the following values of the anode voltage (in V) with respect to the cathode will make the photo current zero?
  1. -4
  2. -6
  3. -8
  4. -10
Question: 4021   The change in wavelength in Compton effect is
  1. independent of the frequency of incident radiation
  2. dependent on the frequency of incident radiation
  3. dependent on the nature of the scattering material
  4. dependent on the intensity of incident radiation
Question: 4022   A triode valve having a plate resistance of 25 kω is used in an oscillator with a load resistance of 50 kω. If the gain of the oscillator is 20, then the amplification factor of the valve is
  1. 40/3
  2. 20
  3. 30
  4. 50
Question: 4023   The depletion layer in a p-n junction diode consists of layers of
  1. positively charged donors on the p-side and negatively charged acceptors on the n-side
  2. negatively charged donors on the p-side and positively charged acceptors on the n-side
  3. positively charged donors on the n-side and negatively charged acceptors on the p-side
  4. negatively charged donors on the n-side and positively charged acceptors on the p-side
Question: 4024   If a ball is dropped from rest, it bounces from the floor repeatedly. The coefficient of restitution if 0.5 and the speed just before the first bounce is 5 m/s. The total time taken by the ball to come to rest is
  1. 2s
  2. 1s
  3. 0.5s
  4. 0.25s
Question: 4025   Which one of the following gives the force required to accelerate a car of mass 200 form rest to 30 m/s in 12 sec if the frictional force between the tyres and the ground is 0.2 Newton per kg?
  1. 5400 N
  2. 5000 N
  3. 4600 N
  4. 400 N
Question: 4027   A weight, W, is suspended from the midpoint of a rope, whose ends are at the same level. In order to make the rope perfectly horizontal, the force applied to each of its ends must be
  1. less than W
  2. equal to W
  3. equal to 2W
  4. infinitely large
Question: 4028   Let Rs and Rm be the distances of geostationary satellite and moon from centre of the earth. Then Rm/Rs approximately
  1. (29)1/2
  2. (29)2/3
  3. 29
  4. (29)3/2
Question: 4029   A satellite is moving in a circular orbit rotating the earth with a diameter of the orbit 2R. At a certain point a rocked fixed to the satellite is fired such that it increases the velocity of satellite tangentially. The resulting orbit of the satellite would be
  1. same as before
  2. circular orbit with diameter greater than 2R
  3. elliptical orbit with minor axis 2R
  4. elliptical orbit with major axis 2R
Question: 4031   If u is the velocity of a particle and c the velocity of light, its relativistic mass m will exceed its rest mass m0 by 4% when the ratio u/c is
  1. 0.4
  2. 0.3
  3. 0.2
  4. 0.1

Answers to the questions of Physics on this page

Following list gives the correct choice for the answer of the Physics mcqs.
4018 . D       4019 . C       4020 . D       4021 . B       4022 . C       4023 . C       4024 . C       4025 . A       4027 . D       4028 . B       4029 . D       4031 . B      

Select Page Number

Physics Page 1Physics Page 2Physics Page 3Physics Page 4Physics Page 5Physics Page 6Physics Page 7Physics Page 8Physics Page 9Physics Page 10Physics Page 11Physics Page 12Physics Page 13Physics Page 14Physics Page 15Physics Page 16Physics Page 17Physics Page 18Physics Page 19Physics Page 20Physics Page 21Physics Page 22Physics Page 23Physics Page 24Physics Page 25Physics Page 26Physics Page 27Physics Page 28Physics Page 29Physics Page 30Physics Page 31Physics Page 32Physics Page 33Physics Page 34Physics Page 35Physics Page 36Physics Page 37Physics Page 38Physics Page 39Physics Page 40Physics Page 41Physics Page 42Physics Page 43Physics Page 44Physics Page 45Physics Page 46Physics Page 47Physics Page 48Physics Page 49Physics Page 50Physics Page 51

MCQ for Practicing Subject Tests

Biology Chemistry Computer Sciences Management Physics Other Subjects
USA College Scholarships Computer Sciences MCQ Management Sciences MCQ Physics MCQ Chemistry MCQ Biology MCQ

----------------------