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use the formula for resistivity to calculate the resistance of a 1.5m long piece of eureka...
Calculate the resistance of a piece of gold wire that is 1.4 m long and has a diameter of 2.8 mm.
The resistance formula is = / where is the resistivity, L the length and A the area. What is the length (in m) of the resistance of a cylindrical wire with the following dimensions: = 0.05 Ω.cm, R = 20 k Ω , diameter = 16 mm?
Suppose you have a 24 m long piece of copper wire with a 2.1 mm diameter and a resistivity of 1.72 × 10-8 Ω⋅m. What is the resistance of the copper wire, in ohms?
1. A number 12 copper wire has a diameter of 2.053 mm. Calculate the resistance of a 37.0 m long piece of such wire. (Use 1.72×10-8 Ωm for the resistivity of copper.) Use the formula for resistance remembering that the diameter is specified rather than the radius. 2. For safety, the National Electrical Code limits the allowable amount of current which such a wire may carry. When used in indoor wiring, the limit is 20.0 A for rubber insulated wire...
A 5.0-m long, 1.0-mm diameter piece of copper wire (resistivity 1.7*10-8m)is woundinto a coil of many turns that has a radius of 0.10 m. The ends of the wire are connected to a 1.5-V battery. Find:a) the magnetic field strength at the center of the coil.b) the magnitude and direction of the magnetic force on a proton placedat the center of the coil
2. A 16.50 cm long wire has a diameter of 0.355 mm and a resistivity of 7.65 x 10-7 S2cm. (a) Calculate its resistance. (b) If a 3.85 volt battery is connected to the wire, w hat current exists in the circuit? (7 pts)
What is the resistance of a 61.1-m-long aluminum wire that has a diameter of 7.77 mm? The resistivity of aluminum is 2.83x 10-8 Ω . m. resistance:
A wire 3.66 m long and 6.77 mm in diameter has a resistance of
21.7 m?. A potential difference of 17.5 V is applied between the
ends. (a) What is the current in amperes in the wire?
(b) What is the magnitude of the current density? (c)
Calculate the resistivity of the material of which the wire is
made.
(a)
Number
Units
(b)
Number
Units
(c)
Number
Units
A wire 3.66 m long and 6.77 mm in diameter has a...
(b) (i) A piece of nichrome wire (a Ni-Cr alloy) has a resistance of 6.5 . The wire has a length of 10 cm and a diameter of 1.2 mm. Calculate the electrical resistivity and conductivity of this wire. You now connect a voltage source to your Ni-Cr wire, using it as a resistive element. (ii) What would happen to the temperature of the wire ? (ii) What would happen to the resistance as the temperature changes ? (iv) Why...
(b) (0) A piece of nichrome wire (a Ni-Cr alloy) has a resistance of 6.5 . The wire has a length of 10 cm and a diameter of 1.2 mm. Calculate the electrical resistivity and conductivity of this wire. You now connect a voltage source to your Ni-Cr wire, using it as a resistive element. (ii) What would happen to the temperature of the wire ? (iii) What would happen to the resistance as the temperature changes ? (iv) Why...