KCET 2020 | Atoms and Nuclei Question 19 | Physics

A beam of fast moving alpha particles were directed towards a thin film of gold. The parts $$A, B$$ and $$C$$ of the transmitted and reflected beams corresponding to the incident parts $$A, B$$ and $$C$$ of the beam are shown in the adjoining diagram. The number of alpha particles in

KCET 2020 Physics - Atoms and Nuclei Question 6 English

$$B^{\prime}$$ will be minimum and in $$C^{\prime}$$ maximum

$$A^{\prime}$$ will be maximum and in $$C^{\prime}$$ minimum

$$A^{\prime}$$ will be minimum and in $$B^{\prime}$$ maximum

$$C^{\prime}$$ will be minimum and in $$B^{\prime}$$ maximum

KCET 2020

MCQ (Single Correct Answer)

-0

Two protons are kept at a separation of $$10 \mathrm{~nm}$$. Let $$F_n$$ and $$F_e$$ the nuclear force and the electromagnetic force between them

$$F_e=F_n$$

$$F_e \gg F_n$$

$$F_e \ll F_n$$

$$F_e$$ and $$F_n$$ differ only slightly

KCET 2020

MCQ (Single Correct Answer)

-0

During a $$\beta^{-}$$-decay

an atomic electron is ejected

an electron which is already present within the nucleus is ejected

a neutron in the nucleus decays emitting an electron

a proton in the nucleus decays emitting an electron

KCET 2020

MCQ (Single Correct Answer)

-0

A radio-active elements has half-life of 15 years. What is the fraction that will decay in 30 years?

0.25

0.5

0.75

0.85

PREVIOUS NEXT

KCET Subjects