4. A SS pressure sensor that outputs 25mV/kPa for a pressure variation of 0.0 to 25 kPa will be used to measure the level of a liquid with a density of 1.3 x 10° kg/m³. What voltage output will be expected for level variations from 0 to 2.0 m ? What is the sensitivity for level measurement expressed in mV/cm.

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9. Consider the circuit in Figure 4. (a) What type of circuit is this? (b) What is the total peak secondary voltage? (c) Find the peak voltage across each half of the secondary. (d) Sketch the voltage waveform across RL. (e) What is the peak current through each diode? (f) What is the PIV for each diode? 4:1 ➜ бого D₁ 120 V rms 00000 ellee D₂ Figure 4 www.li RL 1.0 ΚΩ

For the circuit, the voltage drop for the red LED is 2 volts. (a) Find the voltage drop in Resistor R1 b.) Find the current in Resistor R12 c.) Find the current in Diode D12 d.) Find the power dissipated in Diode D12