Target Exam

CUET

Subject

Physics

Chapter

Nuclei

Question:

The energy equivalent of 5 g of substance is

Options:

$2.8 × 10^{33} eV$

$4.6 × 10^{32} eV$

$2.8 × 10^{32} eV$

$5.6 × 10^{16} eV$

Correct Answer:

$2.8 × 10^{33} eV$

Explanation:

The correct answer is Option (1) - $2.8 × 10^{33} eV$

The energy equivalent of corresponding to an amount of mass (Δm) of a substance is given as -

$E=Δmc^2$

Mass = $5g = 5 × 10^{-3}kg$

Speed of light = $3× 10^{8}m/s$

$E=4.5× 10^{12}J$

$≃2.8× 10^{33} eV$