Class 12th Physics Objective Question Nuclei Chapter on New Pattern
NUCLEI
1. Atomic number decreases with the emission of a particles from the nucleus :
(A) 1
(B) 2
(C) 3
(D) 4
| Answer :- (B) |
2. Density of nucleus is about :
(A) 2.29 x 107 kg m-3
(B) 2.29 x 10-7 kg m-3
(C) 2.29 x 1017 kg m-3
(D) 2.29 x 10-17 kg m-3
| Answer :- (C) |
3. Which of the relations is correct for radioactive atom ?
(A) Half-life = Average life
(B) Half-life = 2 x Average life
(C) Half-life = 1.6931 x Average life
(D) Half-life = 0.6931 x Average life
| Answer :- (D) |
4. The equivalent energy of 1 g of substance is :
(A) 9 x 1013 J
(B) 6 x 1012 J
(C) 3 x 1013 J
(D) 6 x 1013 J
| Answer :- (A) |
5. X-ray was discovered by:
(A) Becqueral
(B) Marie curie
(C) Roengton
(D) Vanlaw
| Answer :- (C) |
6. The order of nuclear density is :
(A) 103
(B) 1017
(C) 106
(D) None
| Answer :- (B) |
7. If R is the radius and A is the mass of a nucleus then the graph of log R versus log A will be:
(A) A straight line
(B) A parabola
(C) An Ellipse’
(D) None of these
| Answer :- (B) |
8. The time in which radioactive substance become half of its intial amount is called :
(A) average life
(B) half-life
(C) time-period
(D) decay constant
| Answer :- (B) |
9. Mass is converted into energy according to the relation :
(A) E = mc2
(B) E = mgh
(c) E = 1/2 mc2
(D) E = mgh / c2
| Answer :- (A) |
10. Who discovered heavy Hydrogen ?
(A) Uray
(B) Thomson
(C) Mosley
(D) Fermi
| Answer :- (A) |
11. Which of the following is not a mode of radioactive decay ?
(A) positron emission
(B) electron capture
(C) fusion
(D) alpha decay
| Answer :- (C) |
12. Which one of the following has maximum penetraing power:
(A) X-rays
(B) cathode rays
(C) α-rays
(D) Y-rays
| Answer :- (D) |
13. Time during which the amount of radioactive substance becomes half of its initial amount is called.
(A) Average life
(B) Half life
(c) Decay constant
(D) Time period
| Answer :- (B) |
14. β-rays are deflected in:
(A) Gravitational field
(B) Only in magnetic field
(C) Only in electrical field
(D) In magnetic and electric field both
| Answer :- (D) |
15. Which one of following is charge less?
(A) Alpha particle
(B) Beta particle
(C) Photon particle
(D) Proton
| Answer :- (C) |
Physics ka Objective Question, 12th Physics Objective Questions and Answers pdf 2021, 12th physics objective questions and answers in Hindi 2021, physics objective questions for 12th Bihar board, 12th physics objective questions and answers in Hindi 2021 pdf, physics 12th objective 2020 pdf, physics 12th objective 2021, physics important questions class 12 State Board 2021, 12th Board Exam Physics Chapter 2 Electric Potential And Capacitance Objective Question, Class 12th Physics Chapter 3 Current Electricity Important Objective Question,12th Board Exam Physics Chapter 4 Moving Charges & Magnetism Objective Question, Class 12th Physics Chapter 6 Electromagnetic Induction VVI Objective Question, Class 12th Physics Chapter 8 Electro-Magnetic Waves VVI Objective Question, Class 12th Physics Chapter 10 Wave Optics VVI Objective Question, 12th Exam 2021 Question paper Download, Bihar Board 12th Question Paper 2021
| 10TH 12TH MOBILE APP | |
| Class 10th | CLICK |
| Class 12th | CLICK |
| 10th Mobile App | CLICK |
| 12th Mobile App | CLICK |
| 12TH BOARD SCIENCE STREAM | |
| Physics | CLICK |
| Chemistry | CLICK |
| Biology | CLICK |
| Mathematics | CLICK |
| Hindi 100 | CLICK |
| English 100 | CLICK |
| Hindi 50 | CLICK |
| English 50 | CLICK |
Class 12th Physics Chapter Wise Electric Charges & Fields VVI Objective Question, 12th physics MCQ with answers 2021, 12th ka physics objective,12 class objective question answer, class 12 Hindi objective question, physics objective book in Hindi pdf, class 11 physics objective questions in Hindi, Physics 12th objective answer 2021, physics objective questions for 12th pdf, Class 12th Physics Chapter 3 Current Electricity Important Objective Question, 12th physics objective question test, physics 12th objective optics, VVI question physics class 12 VVI objective, Class 12th Physics Chapter 5 Magnetism & Matter VVI Objective Question, Class 10th Objective,
Class 12th Physics Most VVI Objective Alternating Current Chapter, BSEB Inter Exam 2021 Important Guess Question Paper, 12th physics Paper, Class 12th Physics Objective Question Nuclei Chapter on New Pattern
Information about sample paper & other things