What are isobars?
Question types
Modern Physics question types
50 questions across 6 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.
50
Questions
6
Question groups
5
Question types
01
[1 Mark Question Answer]
9 Q→02[2 Mark Question Answer]
11 Q→03[3 Mark Question Answer]
11 Q→04[5 Mark Question Answer]
10 Q→05MCQ
7 Q→06fill in the blanks.
2 Q→Sample Questions
Modern Physics questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
View full solution →
Do isotopes have same chemical or physical properties?
What are isotopes?
Which of the radiations α, β and γ is similar to a beam of electrons?
What do you mean by Atomic mass
Give the relative ionizing power of α, β and γ radiations.
State the penetrating range of α, β and γ radiations.
What do you mean by Atomic number
Name the three elementary particles present in an atom. Locate their positions.
What kind of change takes place in a nucleus when a $\beta$-particle is emitted?
View full solution →State two similarities and two dissimilarities between the γ-rays and X-rays.
A radioactive source emits three types of radiations. Name them.
(i) Name the radiations which are charged.
(ii) Name the radiations which are most penetrating.
(iii) Name the radiations which travel with the speed of light.
(iv) Name the radiations which have the largest mass.
(i) Name the radiations which are charged.
(ii) Name the radiations which are most penetrating.
(iii) Name the radiations which travel with the speed of light.
(iv) Name the radiations which have the largest mass.
What happens to the mass number of an element when (i) An $\alpha$-particle, (ii) $A \beta$-particle, and (iii) $\gamma$-radiation is emitted?
View full solution →What happens to the atomic number of element when (i) An $\alpha$-particle, (ii) $A \beta$-particle 1 and (iii) $\gamma$-radiation is emitted?
View full solution →State three safety precautions that you would take while handling the radioactive substances.
In following fig. shows a mixed source S of alpha and beta particles in a thick lead container. The particles pass through a magnetic field in a direction perpendicular to the plane of paper (inwards as shown by x). State and show in the diagram how the particles get affected.
A radioactive nucleus ${ }_{\mathrm{Z}}^{\mathrm{A}} \mathrm{X}$ first emits a beta particle and then an alpha particle to give the resulting nucleus ${ }_Q^P Y$ What will be the values of $P$ and $Q$ in terms of $A$ and $Z$ ?
View full solution →A nucleus of an element $X$ which has the symbol ${ }_{84}^{202} \mathrm{X}$ emits an alpha particle and then a beta particle. The final nucleus is ${ }_b^a Y$ Find $a$ and $b$.
View full solution →Distinguish between $\alpha , \beta$ and $γ$ rays.
View full solution →Explain the use of radioactive in the field of medicine, agriculture and industry.
Which of the following statements are correct?
Neutrons have
Neutrons have
- ANo mass
- BA mass less than that of a proton
- CA mass equal to that of a helium atom
- DMass greater than that of a neutron
Which of the following statements are correct? Electrons have
- ANo mass
- ✓A mass less than that of a proton
- CA mass less than not that of a proton
- DMass greater than that of a proton
Answer: B.
View full solution →Which one of the following statements about alpha and beta particles is
correct?
correct?
- Athey carry equal amounts of charge
- Beach alpha paticle has four times the mass of beta particle
- CThey can both be deflected by magnetic fields when they are in motion
- Dalpha particles have a larger range in air then beta particles
An element P has an atomic mass of 239 and an atomic number of 92. It
emits a beta particle forming an element Q. Q can be represented by.
emits a beta particle forming an element Q. Q can be represented by.
- A$239 \times 91$
- B$239 \times 92$
- ✓$239 \times 93$
- D$238 \times 92$
Answer: C.
View full solution →The element X has an atomic mass number of 238 and an atomic number
of 92. It emits an alpha particle forming an element y. Y can be represented
by
of 92. It emits an alpha particle forming an element y. Y can be represented
by
- ✓$234 \times 90$
- B$236 \times 90$
- C$235 \times 91$
- D$238 \times 92$
Answer: A.
View full solution →The atomic number of a radioactive element is not changed when it emits ............
The mass number (A) of an element is not changed when it emits ______________.
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