What length of silver wire with a diameter of 0.050cm is needed to make a resistance of 23 ohm
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What length of silver wire with a diameter of 0.050cm is needed to make a resistance of 23 ohm. choose from the answers given.
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- If the 0.145 mm diameter tungsten filament in a light bulb is to have a resistance of 0.185 Ω at 20.0°C, how long should it be? The resistivity of tungsten at 20.0°C is 5.60 10-8 Ω · mThere is a potential difference of 1.3 V between the ends of a 20 cm long graphite rod that has a cross-sectional area of 1.9 mm2. The resistivity of graphite is 7.5 10-6 Ω-m. (a) Find the resistance of the rod. _______ (b) Find the current. ________ (c) Find the electric field inside the rod. ________A copper wire has a resistance of 0.400 2 at 20.0°C, and an iron wire has a resistance of 0.430 at the same temperature. At what temperature (in °C) are their resistances equal? This is all the information given.
- 12.0 N 4.00 N 5.00 N 6.00 N 8.00 N (a) Find the equivalent resistance between point a and b. (b) If a voltage of 49.4 V is applied between points a and b, find the current in each resistor. 12 Q A 6 Ω A 5Ω 4 Ω A 8 Ω AYou have a simple circuit consisting of a battery and a lightbulb (you can imagine that this circuit is contained within a flashlight). If the total potential difference provided by the batteries in this circuit is 6V, and if you measure the current to be 23.04mA, what is the resistance of the light bulb (created by the thin wire which composes the filament) in units of Ohms?During surgery, a current as small as 20 µA applied directly to the heart may cause ventricular fibrillation. If the resistance of the exposed heart is 300 £2, what is the smallest voltage that poses this danger? Smallest voltage that poses danger = 6.0 Think: Does your answer imply that special electrical safety precautions are needed? ! No, that's not the correct answer.
- A copper wire has a resistance of 0.475 at 20.0°C, and an iron wire has a resistance of 0.495 at the same temperature. At what temperature (in °C) are their resistances equal? Enter a number. °℃A wire of diameter 0.550 mm and length 45.0 m has a measured resistance of 2.80 Ω. What is the resistivity of the wire?What current flows through a 2.74 cm diameter rod of pure silicon that is 25.0 cm long, when 1000 V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.) The resistivity of pure silicon is 2.30 103 Ω · m. _____A
- A metal wire has a length of 40.0m and a diameter of 0.500mm .The entire length of wire has a resistance of 1.4 Ω. Find the resistivity (in Ω · m) of the metal.A piece of wire of length 104.2 cm and cross- sectional area 278.1 cm² is made from a material of resistivity 10.5 ohm-metre. What is the resistance of this wire?