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Fission Fusion and Radioactivity MCQ 3

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Questions and Answers

What is the formula to calculate the energy difference of a charged particle in an electric field?

$hf = E_1 / E_2$

$hf = E_1^2 - E_2^2$

$hf = E_2 - E_1$ (correct)

$hf = E_2 + E_1$

What is the formula to calculate the activity of a radioactive sample?

A = dN/dt - λN

A = dN/dt + λN

A = λN (correct)

A = λ/dt

What is the relationship between half-life and decay constant?

T_½ = λ^2

T_½ = λ/ln2

T_½ = ln2/λ (correct)

T_½ = 1/λ

What is the formula to calculate energy from mass according to the mass-energy equivalence equation?

E = mc^2 (C) Signup and view all the answers

What does the symbol Z represent in the chemical symbol of an isotope?

Atomic number (A) Signup and view all the answers

What is the unit of the decay constant λ?

Seconds^-1 (C) Signup and view all the answers

What is the relationship between the activity A of a radioactive sample and the number N of undecayed nuclei?

A is directly proportional to N (B) Signup and view all the answers

What is the physical quantity that is related to the frequency f of a charged particle in an electric field?

Energy (C) Signup and view all the answers

What is the unit of the energy E in the formula hf = E2 – E1?

Electronvolts (D) Signup and view all the answers

What is the physical significance of the decay constant λ?

It is the probability of decay per unit time (A) Signup and view all the answers

What is the consequence of the mass-energy equivalence equation E=mc^2?

Mass can be converted to energy and vice versa (B) Signup and view all the answers