Part A You need to design a 0.80 A fuse that "blows" if the current exceeds 0.80 A. The fuse material in your stockroom melts at a current density of 500 A/cm?. What diameter wire of this material will do the job? Express your answer to two significant figures and include the appropriate units. HA D = Value Units Submit Request Answer Provide Feedback

A material is formed into a long rod with a square cross-section 0.50 cm on each side. When a 112 VV voltage is applied across a 20-mm length of the rod, a 4.0 AA current is carried.     Part A What is the resistivity of the material? Express your answer using two significant figures.

A standard 100 W (120 V) lightbulb contains a 7.0-cm-long tungsten filament. The high- temperature resistivity of tungsten is 9.0 × 10-7 Ω m. Part A What is the diameter of the filament? Express your answer with the appropriate units. d = Submit μÅ Value Request Answer Units ****** **** ?

Two 9.0-cm-diameter metal plates 1.2 cm apart are charged to +12.5 nC. They are suddenly connected together by a 0.218-mm-diameter copper wire stretched taut from the center of one plate to the center of the other. Part A What is the maximum current in the wire? Express your answer with the appropriate units. ► View Available Hint(s) Imax = 2.67 10³ A ?

In an integrated circuit, the current density in a 2.3-um-thick x 75-um-wide gold film is 7.0x105 A/m² Part A How much charge flows through the film in 15 min? Express your answer to two significant figures and include the appropriate units. Q = μA Value Submit Request Answer Units ?

Probler It's possible to estimate the percentage of fat in the body by measuring the resistance of the upper leg rather than the upper arm; the calculation is similar. A person's leg meas-ures 40 cm between the knee and the hip, with an average leg diameter (ignoring bone and other poorly conducting tissue) of 12 cm A potential difference of 0.78 V causes a current of 1.6 mA. Part A What are the fractions of muscle and fat in the leg? Express your answer using two significant figures separated by a comma. fm, ff = 91,9

answer sheet in the box on the front table. 1. A metallic conductor is carrying a current. The drift speed of the electrons in the conductor is 2.00 mm/s. The resistivity of the conductor is 2.00 x 10 .m. This conductor has 5.00 x 1028 electrons/m°. What is the magnitude of the electric field in the conductor (in V/m)?

Part A A 1.3x10-3 V/m electric field creates a 4.9x1017 electrons/s current in a 1.5-mm-diameter aluminum wire. What is the drift speed? Express your answer using two significant figures. va = 1.12 • 10-6 m/s Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B What is the mean time between collisions for electrons in this wire? Express your answer using two significant figures. nνα ΑΣφ ? T = S Submit Request Answer Drovide Cood bools