Question:
A dc voltage supply provides \(60V\) when the output is unloaded. When connected to a load, the output drops to \(56V\). Determine the value of voltage regulation.
A dc voltage supply provides \(60V\) when the output is unloaded. When connected to a load, the output drops to \(56V\). Determine the value of voltage regulation.
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A smaller value of voltage regulation indicates a better regulated power supply.
Updated On: Jun 25, 2026
- \(4.5%\)
- \(7.1%\)
- \(14%\)
- \(15%\)
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The Correct Option is B
Solution and Explanation
Concept:
Voltage regulation indicates how much the output voltage changes when the load changes from no-load to full-load.
The percentage voltage regulation is
\[
%VR
=
\frac{V_{NL}-V_{FL}}
{V_{FL}}
\times100.
\]
where
\[
V_{NL}
=
\text{No-load voltage}
\]
and
\[
V_{FL}
=
\text{Full-load voltage}.
\]
Step 1: Write the given values.
\[ V_{NL}=60V \] \[ V_{FL}=56V \]
Step 2: Substitute into the formula.
\[ %VR = \frac{60-56}{56} \times100 \] \[ = \frac{4}{56} \times100 \] \[ = 7.14%. \]
Step 3: Approximate the result.
\[ \boxed{%VR\approx7.1%} \] Hence the correct option is \[ \boxed{(B)\;7.1%} \]
Step 1: Write the given values.
\[ V_{NL}=60V \] \[ V_{FL}=56V \]
Step 2: Substitute into the formula.
\[ %VR = \frac{60-56}{56} \times100 \] \[ = \frac{4}{56} \times100 \] \[ = 7.14%. \]
Step 3: Approximate the result.
\[ \boxed{%VR\approx7.1%} \] Hence the correct option is \[ \boxed{(B)\;7.1%} \]
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