In an integrated circuit, the current density in a 2.2-um-thick x 79-um-wide gold film is 7.1×105 A/m². Part A How much charge flows through the film in 15 min? Express your answer to two significant figures and in 01 Q-0.13 μA C
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- The starter motor of a car engine draws a current of 200 A from the battery. The copper wire to the motor is 4.80 mm in diameter and 1.2 m long. The starter motor runs for 0.610 s until the car engine starts. Part A How much charge passes through the starter motor? Express your answer with the appropriate units. Value Submit ▾ Part B HÅ Submit Value Units Request Answer How far does an electron travel along the wire while the starter motor is on? Express your answer with the appropriate units. μA BRE Units Request Answer ? ?Part A A 55.0-cm-long hollow nichrome tube of inner diameter 2.8 mm, outer diameter 3.0 mm is connected to a 3.0 V battery. What is the current in the tube? Express your answer with the appropriate units. ? µA I = Value APart A A length of aluminum wire is connected to a precision 10.00-V power supply, and a current of 0.4192 A is precisely measured at 23.5 °C. The wire is placed in a new environment of unknown temperature where the measured current is 0.3698 A . The temperature coefficient of resistivity of aluminum is 0.00429 (°C)-1 What is the unknown temperature? Express your answer using three significant figures. να ΑΣφ ? T = °C Submit Request Answer Provide Feedback
- 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.What is the magnitude of the current density across A1? Is the current at A2 larger, smaller, or the same? Is the current density at A2 larger, smaller, or the same? Assume A2 = 2A1.A conductor has a circular cross-sectional area A, length L, and L resistivity p, as shown. A Suppose you want to double the resistance of the conductor. Would the following changes achieve this goal? i) Yes No Replace the conductor with one made from a material with half the resistivity, keeping everything else the same: ii) Replace the conductor with one made from a material with half the conductivity, keeping everything else the same: Yes No Double the length of the conductor, keeping everything else the same: iii) Yes No Double the radius of the conductor, keeping everything else the same: iv) Yes No Yes Reduce the radius of the conductor by half, keeping everything else the same: v) No
- 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.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 ?need help on c and e
- A copper wire has a square cross section 2.9 mm on a side. The wire is 4.1 m long and carries a current of 3.7 A. The density of free electrons is 8.5 x 1028 m-3. Part A Find the magnitude of the current density in the wire. Express your answer in amperes per square meter. ΑΣφ ? J = A/m?An electric current in a conductor varies with time according to the expression I(t) = 90 sin (90πt), where I is in amperes and t is in seconds. What is the total charge passing a given point in the conductor from t = 0 to t = 1/120 s? The charge is the integral of the current. C Need Help? Read It Watch It