A current in a wire increases linearly from zero to 5 Amps in 3 seconds and then remains at that value for 4 more seconds. How much charge moves past a cross-section of the wire over the whole 7 seconds? Part A VO AE Coulombs
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- hiii I need help with part a and part bO Macmillan Learning Two insulated copper wires of similar overall diameter have very different interiors. One wire possesses a solid core of copper, with a circular cross section of radius 3.03 mm. The other wire is composed of 19 strands of thin copper wire bundled together. Each strand has a circular cross section of radius 0.606 mm. The current density J in each wire is the same. J = 1350 A/m² How much current does each wire carry? solid wire current: A solid wire resistance: The resistivity of copper is p = 1.69 × 10-8 Q.m. What is the resistance of a 1.75 m length of each wire? stranded wire current: Ω stranded wire resistance: A ΩA 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 ****** **** ?
- Part A A 5.1x10 V/m electric field creates a 3.5x1017 electrons/s current in a 2.0-mm-diameter aluminum wire. What is the drift speed? Express your answer using two significant figures. m/s = Pa 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.Part A Variations in the resistivity of blood can give valuable clues about changes in various properties of the blood. Suppose a medical device attaches two electrodes into a 2.0-mm-diameter vein at positions 5.1 cm apart. What is the blood resistivity if a 9.0 V potential difference causes a 210 µA current through the blood in the vein? HA ? p = Value Units Submit Request AnswerNeeds Complete solution.
- Part A The starter motor of a car engine draws a current of 120 A from the battery. The wire to the motor is 5.00 mm in diameter and 1.2 m long. The starter motor runs for 0.770 s until the car engine starts. copper How much charge passes through the starter motor? Express your answer with the appropriate units. 円A <. 190 C. Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining Part B How far does an electron travel along the wire while the starter motor is on Express your answer with the appropriate units. HA 0.694 mm Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining TarchQuestion 3 In a cathode ray tube, 3.5 x 10¹5 electrons strike the screen in 30 seconds. What current does this represent? A B C D 8.57 x 10-15 A 1.68 x 10-² A 1.87 x 10-5 A 5.60 x 10-4 AHow long does it take electrons to get from a car battery to the starting motor? Assume the current is 320 A and the electrons travel through a copper wire with cross-sectional area 0.120 cm2 and length 0.840 m. The number of charge carriers per unit volume is 8.49 x 1028 m-3. Number i Unit
- 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 boolsThe terminals of a 0.70 V watch battery are connected by a 150-m- long gold wire with a diameter of 0.200 mm You may want to review (Pages 755 - 759) Part A For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Soil resistivity. What is the current in the wire? Express your answer using three significant figures. ? I = Submit Request Answer