AIEEE 2005 | Atoms and Nuclei Question 280 | Physics

The intensity of gamma radiation from a given source is $$L$$. On passing through $$36$$ $$mm$$ of lead, it is reduced to $${{\rm I} \over 8}.$$ The thickness of lead which will reduce the intensity to $${{\rm I} \over 2}$$ will be

$$9mm$$

$$6mm$$

$$12mm$$

$$18mm$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

The diagram shows the energy levels for an electron in a certain atom. Which transition shown represents the emission of a photon with the most energy? AIEEE 2005 Physics - Atoms and Nuclei Question 257 English

AIEEE 2005 Physics - Atoms and Nuclei Question 257 English

$$iv$$

$$iii$$

$$ii$$

$$i$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

Out of Syllabus

Starting with a sample of pure $${}^{66}Cu,{7 \over 8}$$ of it decays into $$Zn$$ in $$15$$ minutes. The corresponding half life is

$$15$$ minutes

$$10$$ minutes

$$7{1 \over 2}$$ minutes

$$5$$ minutes

AIEEE 2005

MCQ (Single Correct Answer)

-1

A nuclear transformation is denoted by $$X\left( {n,\alpha } \right)\matrix{ 7 \cr 3 \cr } Li.$$ Which of the following is the nucleus of element $$X$$ ?

$${}_5^{10}B$$

$${}^{12}{C_6}$$

$${}_4^{11}Be$$

$${}_5^9B$$

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