Question

If the rms current through a $6.8k\Omega$ resistor is $8mA$, the rms voltage drop across the resistor is

• A. $5.44V$
  
• B. $54.4V$
  
• C. $7.07V$
  
• D. $8V$
  

Answer 1

Answer: (B)

$54.4V$

Rms current $I_{rms}=8mA$

Resistance of resistor $R=6.8k\Omega$

Thus rms voltage $V_{rms}=I_{rms}R$

$\therefore$ $V_{rms}=(8\times {10}^{-3})\times (6.8\times {10}^3)$

$⟹$ $V_{rms}=54.4V$