11-27 We are given the circuit of Fig. 11-23 using a 10-V supply voltage. A current of 5 mA flows when the cell is illuminated with about 400 lm/m², and deenergized when the cell is dark. Find (a) The required series resistance R₁. (b) The level of dark current. Resistance 100 ΚΩ 20 ΚΩ 10 ΚΩ 1 ΚΩ 30 V R₁ www (a) PC 0.1 ΚΩ 10 100 1000 Im/m² 400 Illumination (b) FIGURE 11-23 (a) Relay control by a photocon- ductive (PC) cell and (b) PC cell illumination characteristics.

For the circuit in figure 1. The circuit is at an ambient temperature of 20°C. a) Find Rab at 20°C if a resistor is connected to terminals c and d has a resistance of 10.442 at 5°C. the a at 5°C is 0.291/CO. b) Find the total current if the circuit is energized by a 24V DC source. c) Find the current and voltage of the inserted resistor if a 24V DC source is connected across terminals a and b. 3 2.5 20. 26 75 60 d 3.4 11.25 10 Figure 1

Q: A wood panel containing 16 solar cells. Calculate the total open circuit voltage and short circuit current coming out of the board and draw the relationship between current and voltages in the following cases a) If you connect each two cells in series and connect the groups in parallel . b) If all four cells are connected in parallel and the groups are linked in succession, noting that each cell has the following characteristics: Vos = 0.75V, Isc = 2 mA

Two batteries, A and B, are connected in parallel and an 80 ohm resistor is connected across thebattery terminals. The e.m.f. and the internal resistance of battery A are l00V and 5 ohm respectively,and the corresponding values for battery B are 95V and 3 ohm respectively. Find (a) the value anddirection of the current in each battery and (b) the terminal voltage

Please help!!!

A 230-V, 1 000-c/s voltage is applied to a resistor in series with C capacıtance 0 06 µF, the reading is 100 V. Find the current when the voltmeter is disconnected. 86 0 05 µF. When C is shunted by a voltmeter of [0 0527 A.]

Please answer, a,b,c

Your customer's 50 Ah battery has a usable storage capacity of 70% of its fully charged storage capacity. The battery's manufacturer has specified a maximum c- rate of 0.15. The battery has been operating under a constant load, discharging at 8A for the last 4 hours. What do you immediately need to do? Take the battery out of service because it's discharging too fast Charge the battery immediately before it discharges further Buy 12 new batteries Take the battery out of service because it has used more than its storage capacity Monitor the battery in the normal manner

Q: A wood panel containing 16 solar cells. Calculate the total open circuit voltage and short circuit current coming out of the board and draw the relationship between current and voltages in the following cases 1- If you connect each two cells in series and connect the groups in parallel. 2- If all four cells are connected in parallel and the groups are linked in succession, noting that each cell has the following characteristics: Vos = 0.75V, Isc = 2 mA

A typical “deep-cycle” battery (used for electric trolling motors for fishing boats) is capable of delivering 12 V and 5 A for a period of 10 hours. How much charge flows through the battery in this interval? How much energy is delivered by the battery?