While taking photographs in Death Valley on a day when the temperature is 59.0°C, Bill Hiker finds that a certain voltage applied to a tungsten wire produces a current of 1.000 A. Bill then travels to Antarctica and applies the same voltage to the same wire. What current does he register there if the temperature is −88.0°C? Assume no change occurs in the wire's shape and size.

A charge crossing a surface due to a proton beam is given by Q = 5.0t3 + 3.0t2 + 8.0 where Q is measured in Coulombs and the time t is measured in seconds. What is the current due to the proton beam when t = 3.0 s. О (а) 459 A О (b) 153 А O (c) 297 A O (d) 99 A O (e) 56.7 A

A coil of Nichrome wire is 29.0 m long. The wire has a diameter of 0.460 mm and is at 20.0°C. (a) If it carries a current of 0.460 A, what is the magnitude of the electric field in the wire? (b) If it carries a current of 0.460 A, what is the power delivered to it?

thanks in advance for your help. I will rate high!

The current in a wire at time t is given by the expression I(t) = (2.4 A) e−t/(2.3 µs), where t is in µs. a. Graph I vs t for the interval 0 ≤ t ≤ 10 μs. b. Find an expression for the total amount of charge that has entered the wire at time t if Q(0) = 0 C. c. Graph the total amount of charge that has entered the wire as a function of time for the same interval as in part a.

A conducting rod with a circular cross-section (this rod is a cylinder) has a radius of 10 mm and is 2 metres long. The rod is made of aluminum, so its conductivity is 3.6 x 10' S/m. A potential difference (voltage) is applied at both ends of this rod and the current is I = 90 A. That's a lot of current! a. What is the resistance of the rod, when measured from one end to the other? b. Calculate the current density in the rod along its length. Determine the electric field amplitude at all locations within the rod. c. d. What is the electric potential difference between the two ends of the rod.

Three resistors are made out of three different materials and Material 1 0.00479 Q-m have different (but uniform) cross sections. Resistor 1 has a Material 2 0.391 Q-m circular cross section of radius 1.18 mm. Resistor 2 has a Material 3 6.87 x 10- 2.m square cross section with a side length of 1.37 mm. The third resistor's cross section is a right triangle with two sides of length 6.47 mm. All of the resistors are 0.838 cm in length. Use the provided table of resistivities to calculate the resistance 3 of each resistor. R1 R2 R3 =

A high voltage transmission line of diameter 2.09 cm and length 4.9017 km carries a steady current of 1.1 x 103 A. If the conductor is copper with a free charge density of 4 x 1028 electrons/m3 how long (in seconds) does it take one electron to travel the full length of the cable? (e=1.6 x 1019 C). Use scientific/exponential notation to represent your answer.

Calculate the hours a 25.0 Watt light bulb will burn when powered by a 13.0 g lead storage battery at a constant voltage of 1.5V. 1 Watt = 1 J/s. Pb(s) →Pb+2(aq) + 2e-1 Group of answer choices 0.0504 hours 0.202 hours 0.101 hours 9.91 hours 4.96 hours 27.1 hours