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# Frank Modern Certificate Solution for Class 10 Physics Chapter Unit - 6 - Modern Physics

## Frank Textbook Solutions Chapter Unit - 6 - Modern Physics

Frank Textbook Solutions are considered extremely helpful for solving difficult questions in the ICSE Class 10 Physics exam. TopperLearning Textbook Solutions are compiled by our subject experts. Herein, you can find all the answers to the questions of   Chapter Unit - 6 - Modern Physics for the Frank textbook.

Frank Textbook Solutions for class 10 are in accordance with the latest ICSE syllabus, and they are amended from time to time to be most relevant. Our free Frank Textbook Solutions for ICSE Class 10 Physics will give you deeper insight on the chapters and will help you to score more marks in the final examination. ICSE Class 10 students can refer to our solutions while doing their homework and while preparing for the exam.

Exercise/Page

## Frank Modern Certificate Solution for Class 10 Physics Chapter Unit - 6 - Modern Physics Page/Excercise 283

Solution 1

(a) Mass number of copper = 63
Atomic number of copper = 29
As atomic number of element gives number of proton and electrons while mass number of element gives number of protons +number of neutrons.
So, number of protons in copper = atomic number of copper = 29.
Number of electron in copper = number of protons in copper =29.
Number of neutrons = mass number atomic number = 63 29 =34.
So answer is (iii) as copper contains 29 protons and 29 electrons.

## Frank Modern Certificate Solution for Class 10 Physics Chapter Unit - 6 - Modern Physics Page/Excercise 284

Solution 2

Solution 3

(a)    Electron has        (ii) a mass less than that of a proton.
(b)    Neutrons have     (iv) no electric charge.

Solution 4

Solution 5

Solution 6

(a)Mass number of uranium = 235
Atomic number of uranium = 92
As atomic number of element gives number of proton and electrons while mass number of element gives number of protons +number of neutrons.
So, number of protons in uranium = atomic number of uranium = 92.
(b) Number of electron in uranium = number of protons in uranium =92.
(c)The atoms of same elements having the same atomic number Z but different mass number A are called isotopes. So, for another isotope of uranium mass number 235 changes.
(d)Number of protons in isotopes is same and as U238 is isotope of 92U235. So, number of protons in U235 is also 92.

Solution 7

Solution 8

The atoms of same elements having the same atomic number Z but different mass number a are called isotopes. Hydrogen have 3 isotopes protium 1H1, deuterium 1H2, tritium 1H3.

Solution 9

Solution 10

Solution 11

Following precautions should be taken while handling the radioactive substances.
(i)    The sources should only be handled by the forceps provided and never touched by hand.
(ii)    They should never be pointed towards a person.
(iii)    Food should not be taken where the sources are being used, as it may be contaminated.
(iv)    Never smoke near a radioactive source

Solution 12

Solution 13

Solution 14

(a)    When certain metals are heated to a high temperature, they emit thermions (electrons)  and the phenomenon is called thermionic emission.
(b)    Thermionic emission of electrons from a heated surface depends upon:
(i)    Work function of the material.
(ii)    Melting point of the material.

Solution 15

(a)
(b)    Uses of cathode ray tubes are:
(i)     Cathode ray tubes are used in science research laboratories by scientist for converting electrical signals into visual signals and television tubes.
(ii)     Cathode ray tubes are used by doctors for converting electrical impulses corresponding to heart beats into visual signals in ECG, EEG etc.

Solution 16

Solution 17

Solution 18

Following precautions should be taken while handling the radioactive substances.
(i)    The sources should only be handled by the forceps provided and never touched by hand.
(ii)    They should never be pointed towards a person.
(iii)    Food should not be taken where the sources are being used, as it may be contaminated.
(iv)    Never smoke near a radioactive source.

Solution 19

Solution 20

The low temperature microwave radiation that arrives at the earth's surface from all directions of outer space is called background radiation.
(b)    Rocks in the earth which contain traces of radioactive substances.
(c)    Naturally occurring isotopes.
No, it is not possible to keep ourselves away from these radiations.

## Browse Study Material

TopperLearning provides step-by-step solutions for each question in each chapter in the Frank textbook recommended by ICSE schools. Access Chapter Unit - 6 - Modern Physics here. Our Frank Textbook Solutions for ICSE Class 10 Physics are designed by our subject matter experts. These solutions will help you to revise the whole chapter, so you can clear your fundamentals before the examination.

# Text Book Solutions

ICSE X - Physics

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