The recommended way to discharge a capacitor is to

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Multiple Choice

The recommended way to discharge a capacitor is to

Discharging a capacitor safely comes down to giving the stored energy a controlled path that limits current and can handle the heat. A resistor provides that path because it converts the energy into heat gradually, rather than letting a sudden short surge flow. Using a fairly large resistance, like 20 kilohms, keeps the discharge current very small (I ≈ V/R). With a high resistance, you won’t get a dangerous spark or large current that could flash arcing or damage components. The resistor’s 5-watt rating ensures it can absorb the energy it dissipates during the discharge without overheating. Insulated leads are important too, because they prevent accidental shocks or arcing as you handle and connect the discharge path. By comparison, shorting the capacitor with a metal tool creates a near-short circuit, causing a large, instantaneous current that can harm the capacitor, the tool, or nearby circuitry and can be dangerous to you. Discharging through the circuit might be acceptable in some designs, but it’s unpredictable and can stress other components. A much smaller resistor (like 100 ohms) would still allow a large current to flow, increasing risk. So, a high-value resistor with adequate power rating and insulated leads provides a safe, controlled way to discharge a capacitor.

Discharging a capacitor safely comes down to giving the stored energy a controlled path that limits current and can handle the heat. A resistor provides that path because it converts the energy into heat gradually, rather than letting a sudden short surge flow.

Using a fairly large resistance, like 20 kilohms, keeps the discharge current very small (I ≈ V/R). With a high resistance, you won’t get a dangerous spark or large current that could flash arcing or damage components. The resistor’s 5-watt rating ensures it can absorb the energy it dissipates during the discharge without overheating. Insulated leads are important too, because they prevent accidental shocks or arcing as you handle and connect the discharge path.

By comparison, shorting the capacitor with a metal tool creates a near-short circuit, causing a large, instantaneous current that can harm the capacitor, the tool, or nearby circuitry and can be dangerous to you. Discharging through the circuit might be acceptable in some designs, but it’s unpredictable and can stress other components. A much smaller resistor (like 100 ohms) would still allow a large current to flow, increasing risk.

So, a high-value resistor with adequate power rating and insulated leads provides a safe, controlled way to discharge a capacitor.

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