Pi Phase 2.docx
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Pi Phase 2.docx as PDF for free.
More details
- Words: 306
- Pages: 2
Nuclear Physics Time: 35 mins
PhaseTest-2-P1
Total Marks: 20
Q. No. 1 Encircle the correct answer from the ones given with each questions.
1×4=4
1. As a sample of radioactive element decays, its half-life a. decreases c. increases b. remains the same d. changes exponentially 2. A mass spectrometer maybe used to distinguished between a. different elements c . different isotopes b. identical isotopes bearing different charge d. all 3. Which rays are deflected the most when pass through the same electric field a. Alpha c. Beta b. Gamma d. All of these 4. Decay constant is ……………….. Proportional to half-life. a. Directly c. Inversely b. Not d. None Q. No. 2 Write any four short answers to the following questions.
2×4=8
i. If a nucleus has a half-life of 1 year, does this mean that it will be completely decayed after 2 years ii. How can radioactivity help in the treatment of cancer? iii. Define excitation energy and ionization energy. iv. How does a ka x-ray differ from a KB x-ray? v. How does stimulated emission differ from spontaneous emission? vi. How does normal population differ from population inversion? Q. No 3. 5+3=8 a) Write a note on electric potential at a point due to point charge b) A particle carrying a charge of ‘2e’ falls through potential differences off 3.0 volts.
Calculate the energy acquired by it? Q. No 4.
a) Define resistivity and explain its dependence upon temperature. Also derive a relation for temperature co-efficient in terms of resistivity.
b) The potential difference between the terminals of a battery in open circuit is 2.2 volts. When it is connected across a resistance of 5 ohm, the potential falls to 1.8 volts. Calculate the current and internal resistance of a battery.
STANDARD ACADEMY PHALIA PHONE/WHATSAPP @ 0333-4947086
3
STANDARD ACADEMY PHALIA PHONE/WHATSAPP @ 0333-4947086
PhaseTest-2-P1
Total Marks: 20
Q. No. 1 Encircle the correct answer from the ones given with each questions.
1×4=4
1. As a sample of radioactive element decays, its half-life a. decreases c. increases b. remains the same d. changes exponentially 2. A mass spectrometer maybe used to distinguished between a. different elements c . different isotopes b. identical isotopes bearing different charge d. all 3. Which rays are deflected the most when pass through the same electric field a. Alpha c. Beta b. Gamma d. All of these 4. Decay constant is ……………….. Proportional to half-life. a. Directly c. Inversely b. Not d. None Q. No. 2 Write any four short answers to the following questions.
2×4=8
i. If a nucleus has a half-life of 1 year, does this mean that it will be completely decayed after 2 years ii. How can radioactivity help in the treatment of cancer? iii. Define excitation energy and ionization energy. iv. How does a ka x-ray differ from a KB x-ray? v. How does stimulated emission differ from spontaneous emission? vi. How does normal population differ from population inversion? Q. No 3. 5+3=8 a) Write a note on electric potential at a point due to point charge b) A particle carrying a charge of ‘2e’ falls through potential differences off 3.0 volts.
Calculate the energy acquired by it? Q. No 4.
a) Define resistivity and explain its dependence upon temperature. Also derive a relation for temperature co-efficient in terms of resistivity.
b) The potential difference between the terminals of a battery in open circuit is 2.2 volts. When it is connected across a resistance of 5 ohm, the potential falls to 1.8 volts. Calculate the current and internal resistance of a battery.
STANDARD ACADEMY PHALIA PHONE/WHATSAPP @ 0333-4947086
3
STANDARD ACADEMY PHALIA PHONE/WHATSAPP @ 0333-4947086
