IGCSE Physics (0625) Unit 5. Atomic physics-5.2.5 Safety precautions - Paper 2

The diagram shows a radioactivity experiment.

When a piece of paper is used as the absorber, the count rate drops to the background count rate.

Which radiation is the source emitting?

A $\alpha$ -radiation only

B $\beta$ -radiation only

C $\gamma$ -radiation only

D $\alpha$ -radiation, $\beta$ -radiation and $\gamma$ -radiation

Answer/Explanation

Ans: A

Four students are discussing ideas about radioactive decay.

Answer/Explanation

Ans: B

The diagram shows a box used for storing radioactive sources.

Which material is best for lining the box to prevent the escape of most radioactive emissions?

A. aluminium

B. copper

C. lead

D. steel

Answer/Explanation

Ans: C

IGCSE Physics (0625) Unit 5. Atomic physics-5.2.5 Safety precautions – Paper 2