Static power statement true?

Static power statement true?

• A. It scales with switching rate.
• B. It is consumed when idle due to leakage.
• C. It is unrelated to leakage.
• D. It is consumed during charging/discharging.

Answer: (B)

Static power comes from leakage currents in transistors. Even when the circuit is idle and not switching, current leaks from the supply to ground through the transistors, so power is still dissipated. This is why the statement that static power is consumed when idle due to leakage is true. That leakage-based consumption is not tied to how often the circuit switches. Dynamic power depends on activity: it scales with switching rate because each transition charges and discharges capacitive loads, costing energy per transition. Saying static power scales with switching rate would mix it with dynamic effects, which is incorrect. The idea that static power is unrelated to leakage is false because leakage is the fundamental cause. And claiming static power is consumed during charging and discharging points to dynamic power, not static power.

Static power comes from leakage currents in transistors. Even when the circuit is idle and not switching, current leaks from the supply to ground through the transistors, so power is still dissipated. This is why the statement that static power is consumed when idle due to leakage is true.

That leakage-based consumption is not tied to how often the circuit switches. Dynamic power depends on activity: it scales with switching rate because each transition charges and discharges capacitive loads, costing energy per transition. Saying static power scales with switching rate would mix it with dynamic effects, which is incorrect. The idea that static power is unrelated to leakage is false because leakage is the fundamental cause. And claiming static power is consumed during charging and discharging points to dynamic power, not static power.