MCQ
Electron volt $(ev)$ is the unit of:
- ✓Energy.
- BPotential.
- CCurrent.
- DCharge.
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$(1)$ If $h >2 R$ and $r > R$ then $\Phi=\frac{ Q }{\in_0}$
$(2)$ If $h <\frac{8 R }{5}$ and $r =\frac{3 R }{5}$ then $\Phi=0$
$(3)$ If $h >2 R$ and $r =\frac{4 K }{5}$ then $\Phi=\frac{ Q }{5 \in_0}$
$(4)$ If $h >2 R$ and $r =\frac{3 K }{5}$ then $\Phi=\frac{ Q }{5 \in_0}$