Refer to NEET Physics Matter Waves Cathode and Positive Rays MCQs Set A provided below. NEET Full Syllabus Physics MCQs with answers available in Pdf for free download. The MCQ Questions for Full Syllabus Physics with answers have been prepared as per the latest syllabus, NEET books and examination pattern suggested in Full Syllabus by NEET, NCERT and KVS. Multiple Choice Questions for Matter Waves Cathode and Positive Rays are an important part of exams for Full Syllabus Physics and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for NEET Full Syllabus Physics and also download more latest study material for all subjects
MCQ for Full Syllabus Physics Matter Waves Cathode and Positive Rays
Full Syllabus Physics students should refer to the following multiple-choice questions with answers for Matter Waves Cathode and Positive Rays in Full Syllabus. These MCQ questions with answers for Full Syllabus Physics will come in exams and help you to score good marks
Matter Waves Cathode and Positive Rays MCQ Questions Full Syllabus Physics with Answers
Question: A strong argument for the particle nature of cathode rays is that they
a) get deflected by electric and magnetic fields
b) cast shadow
c) travel through vacuum
d) produce fluoroscence
Answer: get deflected by electric and magnetic fields
Question: In an electron gun the control grid is given a negative potential relative to cathode in order to
a) repel electrons and thus to control the number of electrons passing through it
b) to select electrons of same velocity and to converge them along the axis
c) to decrease the kinetic energy of electrons
d) decelerate electrons
Answer: repel electrons and thus to control the number of electrons passing through it
Question: When the speed of electrons increase, then the value of its specific charge
a) decreases
b) increases
c) ramains unchanged
d) increases upto some velocity and then begins to decrease
Answer: decreases
Question: The specific charge for cathode rays is
a) constant
b) variable
c) depend upon the material of the cathode
d) depend upon the nature of gas in the discharge tube
Answer: constant
Question: particle with rest mass m0 is moving with speed of light c. The de-Broglie wavelength associated with it will be
a) zero
b) m0 c/h
c) Both
d) None of these
Answer: zero
Question: A steel ball of mass m is moving with a kinetic energy K. The de-Broglie wavelength associated with the ball is
a)
b)
c)
d) None of these
Answer:
Question: If a photon and an electron have same de-Broglie wavelength, then
a) electron has more K.E. than proton
b) both have same velocity
c) proton has more K.E. than electron
d) both have same kinetic energy
Answer: electron has more K.E. than proton
Question: For an electron accelerated from rest through a potential V, the de Broglie wavelength associated will be
a)
b)
c)
d)
Answer:
Question: Cathode rays and canal rays produced in a certain discharge tube are deflected in the same direction if
a) a magnetic field is applied normally
b) an electric field is applied normally
c) an electrin field is applied tangentially
d) a magnetic field is applied tangentially
Answer: a magnetic field is applied normally
Question: If E1, E2, E3 are the respective kinetic energies of an electron, an alpha-particle and a proton, each having the same de-Broglie wavelength, then
a)
b)
c)
d) None of these
Answer:
Question: If the momentum of electron is changed by P, then the de Broglie wavelength associated with it changes by 0.5%. The initial momentum of electron will be
a) 200 P
b) 400 P
c) 100 P
d) 300 P
Answer: 200 P
Question: Cathode rays are made to pass between the poles of a magnet perpendicular to axis, the effect of the magnetic field is
a) to deflect them upwards above the plane of paper
b) to deflect them towards the south pole
c) to deflect them towards the north pole
d) to increase the velocity of rays
Answer: to deflect them upwards above the plane of paper
Question: If the kinetic energy of a free electron doubles, it’s de-Broglie wavelength changes by the factor
a)
b)
c) 2
d) None of these
Answer:
Question: If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de-Broglie wavelength of the particle is :
a) 75
b) 60
c) 50
d) 25
Answer: 75
Question:
a)
b) 2 : 1
c) 1 : 2
d) 1 : 1
Answer:
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NEET Full Syllabus Physics Matter Waves Cathode and Positive Rays MCQs
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MCQs for Physics NEET Full Syllabus Matter Waves Cathode and Positive Rays
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Matter Waves Cathode and Positive Rays MCQs Physics NEET Full Syllabus
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Matter Waves Cathode and Positive Rays NEET Full Syllabus MCQs Physics
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NEET MCQs Physics Full Syllabus Matter Waves Cathode and Positive Rays
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