MCQ
The SI unit of surface charge density is:
- A$C / m$
- ✓$C / m ^2$
- C$Cm$
- D$Cm ^2$
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$(i)\;A+B\;\to\; C \;+\;\varepsilon $
$(ii)\;C\;\to \;A\;+\;B\;+\;\varepsilon $
$(iii)\;D\;+\;E\;\to \; F\;+$$\;\varepsilon $
$(iv)\;F\;\to \; D\;+\;E\;+\;\varepsilon $
$\;\varepsilon $ is the energy released? In which reactions is $\;\varepsilon $ positive?

Reason $(R):$ Electrostatic force of repulsion between two protons reduces net nuclear forces between them.
