25.25 • (a) What is the resistance of a Nichrome wire at 0.0°C i its resistance is 100.00 N at 11.5°C? (b) What is the resistance of: carbon rod at 25.8°C if its resistance is 0.0160 Q at 0.0°C?

Midterm-Level Problem! AO ww R1 ww R3 ww R4 ww R6 ww R7 R8 ww Во- ww R2 Each resistor is 100 ohms, same as in class. R5 www R9 ww The potential difference between point A and point B is 41 Volts 1) Simplify the circuit to a *single* resistor using series and parallel rules. (Hint: work from right to left, simplifying a few at a time. You'll need to iterate between series and parallel.) 2) Use the total resistance of the whole circuit and the potential difference (41 volts) to determine the total current pulled into the circuit. (Hint: this should match the result from class through *two* of the resistors.) 3) Why doesn't your answer match for the other 7 resistors?

A normal conductor has the following characteristics: Resistivity at 20°C po = 7.21 × 10-8Nm • Temperature coefficient a 0.0034 () What is the resistivity of this conductor ata temperatureT=-33°C? Calculate the answer as a multiple of 10 Nm rounded off to 2 decimal places but do not include the u

1Ω 2Ω 3Ω 18.1 V 4Ω 19.9V In the circuit above, what is the magnitude of the current through the 19.9 Volt Battery? HINT: If a particular value in your calculations is "unwieldy", appreciate that you can solve this problem for generic voltages fırst and then simply plug in the values at the very end of the process.