a. What is the conductance of a wire if a voltage of 9 V is measured across its terminals when a current of 1.5 A flows through it? b. Calculate the power supplied or absorbed by the element shown below. Your answer should identify whether power is being supplied or absorbed. C. + 2 V G = 0.1 S The resistance of a 1 mm diameter wire of a given material is 12 . Calculate the resistance of a 2 mm diameter wire of the same material and length.

Q: Calculate the cross-sectional area, in mm2, of a piece of copper wire, 40 m in length and having a…

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Q: Determine the thermal coefficient of resistance of copper at 500C, then use this value to determine…

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Q: Calculate the cross-sectional area, in mm2, of a piece of copper wire, 40 m in length and having a…

A: Given, l=40 mR=0.25 ohmρ=0.02×10-6 ohm A = ?

Q: Q5: Derive the expression for power P = VI in an electrical circuit. Q6: What is the resistance of…

A: 5) From Ohm’s law, we know that ⇒I=VRPower in a circuit is the amount of work done by the circuit in…

Q: The resistance of a wire varies directly with its length and inversely with the square of its…

A: Given a wire of same material, Case (1), Resistance of wire, R1=80 Ω Length of wire, L1=100 ft…

Q: Diagram of the problem, necessary formulas, clearance and numerical solution. A steady current of…

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Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).