The length of a coil of wire is, L = 1.5 m, and Area, A =...
The length of a coil of wire is, L = 1.5 m, and Area, A = 2 (cm)2. The Resistance of this wire is 12.26 Ohms at 31.6 Celsius and 14.66 Ohms at 100 Celsius. Calculate the temperature coefficient of the wire with this information.
Homework Answers
it is found that the resistance of a coil of wire increases from 40 ohms at...
it is found that the resistance of a coil of wire increases from 40 ohms at 15C to 50 ohms at 60C. calculate the resistance temperature coefficient at 0C of the conductor material?
The resistance R of a wire varies directly with the length L of the wire and...
The resistance R of a wire varies directly with the length L of the wire and inversely with the square of its radius r. A wire with a length of 350 cm and a radius of 0.4 cm has a resistance of 16 ohms. Determine the resistance of a 500 cm piece of similar wire with a radius of 0.35 cm. Round your final answer to four decimal places and be sure to include units.
You have a wire of length L = 0.8 m for making a square coil of...
You have a wire of length L = 0.8 m for making a square coil of a dc motor. The current in the coil is I = 2.1 A, and the magnetic field of the motor has a magnitude of B = 0.18 T. Find the maximum torque exerted on the coil when the wire is used to make (a) a single-turn square coil and (b) a two-turn square coil.
You have a wire of length L = 1.6 m for making a square coil of...
You have a wire of length L = 1.6 m for making a square coil of a dc motor. The current in the coil is I = 1.1 A, and the magnetic field of the motor has a magnitude of B = 0.14 T. Find the maximum torque exerted on the coil when the wire is used to make (a) a single-turn square coil and (b) a two-turn square coil.
A certain wire has a diameter of 1.2 mm and a length of 210 m. If...
A certain wire has a diameter of 1.2 mm and a length of 210 m. If it has a resistance of 30 ohms and 20 degrees celsius, what is the resistiviy?
A certain wire has a diameter of 1.2 mm and a length of 250 m. If...
A certain wire has a diameter of 1.2 mm and a length of 250 m. If it has a resistance of 23 ohms and 20 degrees celsius, what is the resistiviy?
A wire of length 0.47 meters and cross-section area 7.1 cm 2 has resistivity 96x10 -6...
A wire of length 0.47 meters and cross-section area 7.1 cm 2 has resistivity 96x10 -6 Ohm-meters. What is the resistance (in Ohms) of this wire?
A circular coil of wire with a radius 4 cm and 150 Turns is placed in...
A circular coil of wire with a radius 4 cm and 150 Turns is placed in a uniform magnetic field of magnitude 0.6 T. The magnetic field is parallel to the area vector; I.e. perpendicular to the plane of the coil. A)What is the magnetic flux through the coil? B)The magnetic field is decreased to 0T in .1 seconds. What is the magnitude of the emf induced in the coil during this time interval?C) If the coil has a resistance...
One copper wire has a cross sectional area of A and resistance R and length L....
One copper wire has a cross sectional area of A and resistance R and length L. A second copper wire has a length L and cross-sectional area 2A. What is the resistance of the second wire in terms of R? R/2 R 2R 4R Some other value
The resistance R of a wire of length l and uniform area of cross-section A is...
The resistance R of a wire of length l and uniform area of cross-section A is given by R = rhol/A, where rho is the resistivity of the wire. You melt the wire and recast it to have a new length l' = 10l (keeping the volume V = Al of the wire constant). What is the new resistance of the wire, if the original resistance of the wire was 100.0 Ohm.
The resistance R of a wire of length l and uniform area of cross-section A is given by R = rhol/A, where rho is the resistivity of the wire. You melt the wire and recast it to have a new length l' = 10l (keeping the volume V = Al of the wire constant). What is the new resistance of the wire, if the original resistance of the wire was 100.0 Ohm.
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