COMEDK 2025 Evening Shift | Atoms and Nuclei Question 6 | Physics

When ${ }^{10} \mathrm{~B}_5$ nuclei are bombarded by neutrons, one of the resultant nuclei is ${ }^7 \mathrm{Li}_3$. Then the emitted particle will be:

Alpha particle

Neutrons

Gamma particle

Beta particle

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

What is the frequency ' $\nu$ ' of the electron in Bohr's first orbit of radius ' $r$ ' of the hydrogen atom?

$v=\frac{e^2}{4 \pi \varepsilon_0 h r}$

$v=\frac{e^2}{2 \pi \varepsilon_0 h r^2}$

$v=\frac{e^2}{4 \pi \varepsilon_0 h r^2}$

$v=\frac{e^2}{2 \pi \varepsilon_0 h r}$

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

To get 300 MW electric power for half an hour, how much mass is to be completely converted into energy?

$6 \times 10^{-2} \mathrm{~kg}$

$3 \times 10^{-6} \mathrm{~kg}$

$6 \times 10^{-3} \mathrm{~kg}$

$6 \times 10^{-6} \mathrm{~kg}$

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

Fusion reaction is more energetic than fission reaction because

Uncontrolled chain reaction is taking place In the fusion reaction.

Fusion reaction is taking place at very high temperature

The energy released per unit mass of the fuel in fusion reaction is larger than the energy released per unit mass of the fuel in fission reaction.

In the fusion reaction lighter nuclei combine to form a heavier nucleus

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