A $\text{dc}$ power supply has a no-load voltage if $30 \mathrm{~V}$, and a full-load voltage of $25 \mathrm{~V}$ at a full - load current of $1 \mathrm{~A}$. Its output resistance and load regulation, respectively, are
- $5\; \Omega\; \mathrm{and} \;20\%$
- $25 \;\Omega\; \mathrm{and} \;20 \%$
- $5 \;\Omega\; \mathrm{and} \;16.7 \%$
- $25\; \Omega \;\mathrm{and}\; 16.7 \%$