The specific resistance of platinum at 0o c is 10.3 .cm . how long must a wire of platinum be to have a resistance of 4  at 0o c , if the diameter ( d ) = 0.0274 cm . What will be the resistance of the wire at 100o c if the temperature coefficient ( ∝ ) of platinum is 0.0038 per oC

Can you explain the calculation I saw some similar online but I don’t think it’s right can u illustrate me

The current through the diode in the circuit given in the Figure below when Vy = 0.7 V is? ww 8092 12V Select one a. 24.26 mA b. 13.09 mA c. 58.23 mA d. 40.13 mA 40-52 ww 3092 ID

Determine the current 1, 12, 13 in mA and the voltage across R1 for the network shown in the figure if E=30 V. Assume diode to be silicon. D I, 3.3 kn R2 13 D2 R1 5.6 kN

In the circuit shown in Figure 2–41 (p. 94), the current I is 34.28 mA. What is the voltage drop across the diode? What is its dc resistance?

Use Kirchhoff's law method Indicates the conduction status of the diode The result is the table of current and voltage values for each element Incorporates the diode conduction voltage if applicable 7) R1 - IK E1 R2 lov (+ D1 esi D2@s

please answer all parts

An 18-gauge copper wire with a diameter of 1-mm carries a constant current of 1-A. The charge concentration in the wire is 8.5 x 1028 per cubic meter. Determine the resistance, in ohms, of a 77-m wire in milli-ohm. Use resistivity equal to 1.72x10-8 ohm-m.

The primary voltage on the transformer in Figure 2–46 (p. 96) is 120 V rms and NP : NS = 15:1. Diode voltage drops are 0.7 V. (a) What should be the value of RL if the average current in RL must be 0.5 A? (d) Is it alright to measure with an oscilloscope both the input and output waveforms at the same time in Figure 2-46?  Why or why not?

Find the current of silicon diodes.