C: 6
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An isotope X is radioactive and has a half-life of 4 years. A sample initially contains 8000 atoms of X. After how ma…
Energy is released in some power stations and in the Sun by either nuclear fission or nuclear fusion. Which type of n…
A school keeps radioactive sources for use in radioactivity experiments in a laboratory. The background radiation is …
Two straight electrical conductors are parallel to one another. Each carries a current, one into the plane of the pap…
A polythene rod is rubbed with a duster. The duster then attracts small pieces of paper. Are the rod and the duster c…
The voltage/current graph for a filament lamp is shown. The voltage across the lamp increases. What happens to the te…