Top 30 Morden Physics 2023 Important Questions And Answers
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Morden Physics Important Questions And Answers
Q1. What is the atomic number of an element?
Ans. number of protons in the nucleus
Q2. Energy is created by the Sun?
Ans. by nuclear fusion
Q3. Which has a negative charge?
Q4. The difference between a nuclear reactor and an atomic bomb is that
Ans. The chain reaction in a nuclear reactor is controlled while in an atomic bomb it is uncontrolled.
Q5. An alpha particle has two units of positive charge. Its mass is approximately equal to?
Ans. of a helium atom
Q6. Cobalt-60 is commonly used in radiation therapy because it emits
Ans. gamma rays
Q7. are you in the nucleus of an atom?
Ans. protons and neutrons
Q8. What is the mass number of an element whose atom has two protons, two neutrons, and two electrons?
Q9. is the size of the nucleus?
Ans. 10-15 m
Q10. Who discovered Positron?
Q11. The number of protons in the nucleus of a hydrogen atom is?
Q12. Electron was discovered?
Ans. Thomson has
Q13. Neutron was discovered?
Q14. A LASER beam is always
Ans. diverging beam
Q15. A beam of light that is highly directional is called a?
Q16. Do protons live in an atom?
Ans. inside the nucleus
Q17. carries electrons?
Ans. one unit negative charge
Q18. Isotopes, in atoms –
Ans. have the same number of protons
Q19. Atoms that have the same atomic number but different atomic masses are called?
Q20. Why is nuclear fusion also called thermonuclear reaction?
Ans. fusion produces a lot of heat
Q21. Radiocarbon dating is used to determine the age of
Ans. of fossils
Q22. What is a nuclear reactor?
Ans. heavy water pond
Q23. By which method is the age of the earth determined?
Ans. uranium method
Q24. Isotopes are atoms of the same element whose –
Ans. different atomic mass but same atomic number
Q25. An isotope of an atomic nucleus is a nucleus in which –
Ans. The same number of protons, but a different number of neutrons
Q26. Two elements having a different number of electrons but the same mass number are called
Q27. Where are nuclear piles used?
Ans. in the operation of thermonuclear fusion
Q28. Whose unit is it named?
Ans. of radioactivity
Q29. Which material is used in the fabrication of transistors?
Q30. The semiconductor chip used in an integrated circuit is made of?
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