MCQ
Which one of them is a radioisotope?
- ACobalt-60
- BCarbon-12
- CCarbon-14
- DNone of the above
Explanation:
Radioactive isotopes have unstable nucleus which emits energy and particles when it converts to stable form. Cobalt-60 is an isotope used to treat Cancer like problems.
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Two identical cells send the same current in 2Ω resistance, whether connected in series or in parallel. The internal resistance of the cell should be
|
(a) 1 Ω |
(b) 2 Ω |
(c) |
(d) 2.5 Ω |