A nichrome wire (length L and diameter d) is attached to the electrodes of a battery. Determine the current, in amps. 1.6 m; d = 1.1 mm; V = 1.5 V L = .807 A

If the 0.1-mm-diameter tungsten filament in a light bulb is to have a resistance of 0.25 2 at 20°C, how long should it be? The resistivity of tungsten is at 20°C is 5.6 x 10-8 22.m. L= 3.351 X 10 m No, that's not the correct answer.

A current of 4.4 A flows for 16.0 s through a conductor. Calculate the number of electrons that pass through a point in the conductor during this time. Answer format: 1.23e+45

A 2.0 mm diameter iron wire ( resistivity, p = 9.7 x 10-° 2-m) carries a current of 2.5 A. Determine the potential difference across this 20m length of the wire. (A 1.544 v B 0.544 v C) 1.618 v 0.618 v

Question 1 I= Part (a) I measure the resistance of this wire and find it to be R = 156 Q2. What is the resistivity of the material the wire is made out of? p=5.182 *10-4 p=5.182 x 10-4 ✓ Correct! Part (b) What is the conductivity of this wire, in inverse Ohms per meter? 1930. ✓ Correct! o=1929.8 Part (c) Part (c) Give an expression for the current density in the wire if an electric field E is passing through it. Write this in terms of the resistivity and the other variables in the problem. A particular wire has a length of L = 2.7 m and a circular cross-sectional area of radius r = 1.69 mm. X J= EL/Rar² x J= E/p Question 2 Correct Answer E-Pat sin()) cotan() atan() cosh() E-4.752x10 ✓ Correct! B 8 L P Student Final Submission E-Pat Part (b) How much energy has been used in joules? Y d h m 7 Part (d) Calculate the current in the wire, in milliamperes, if the field strength is 5.28 V/m. r cos() asin() acotan() sinh() tanh() cotanh() Degrees O Radians You leave a 110 W light bulb on for…

Wire C and wire D are made from the same material of resistivity p- 2.0 x 10 am. The length and radius of wire Care Le 1.0m and re 2.00 mm, and those of wire D are Le- 0.50.m and ro-0.75 mm. The wires are joined as shown in the figure. What is the resistance R between points 1 and 2?

1. Consider a cylindrical wire that has conduction electron density 6.0 x 1028 and radius 0.5 mm. An electric field with strength 1 m3 7.5 x 10-4 creates a current of 4.8 × 10" electrons per second. a) What is the average drift speed for an electron? (include units) b) What is the average time in between electron collisions? fs (express your answer in femtoseconds)

The potential difference across the terminals of a battery is8.40 V when there is a current of 1.50 A in the battery from the negativeto the positive terminal. When the current is 3.50 A in the reverse direction,the potential difference becomes 10.20 V. What is the internal resistance of the battery?

A conductor has a cross-sectional area of 2.3×10-6 m² and the number of free electrons per unit volume is 8.5x 1028 electron/m3. When the current is 7.5 A, find the drift speed (in mm/s) of the electrons. Use the charge of the electron to be 1.6x 10-19 C. Select one: OA. 31.48 O B. 0.16 O C. 0.24 D. 0.31 E. 23.98 Next page

A total charge of 6.58 mC passes through a cross-sectional area of a wire in 1.83 s. What is the current in the wire? Answer in units of mA.