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GENERAL INSTRUCTION. PROVIDE SOLUTION/EXPLANATION FOR EVERY ANSWER. 1. A copper wire has a square cross section 2.1 mm o
Posted: Tue May 03, 2022 6:27 am
by answerhappygod
- General Instruction Provide Solution Explanation For Every Answer 1 A Copper Wire Has A Square Cross Section 2 1 Mm O 1 (86 KiB) Viewed 45 times
GENERAL INSTRUCTION. PROVIDE SOLUTION/EXPLANATION FOR EVERY ANSWER. 1. A copper wire has a square cross section 2.1 mm on a side. The wire is 4.3 m long and carries a current of 3.6 A. The density of free electrons is 8.5*1028m2. Find the magnitudes of (a) the current density in the wire and (b) the electric field in the wire. (c) How much time is required for an electron to travel the length of the wire? 2. When a resistor with resistance Ris connected to a 1.50 V flashlight battery, the resistor consumes 0.0625 W of electrical power. (Throughout, assume that each battery has negligible internal resistance.) (a) What power does the resistor consume if it is connected to a 12.6 V car battery? Assume that remains constant when the power consumption changes. (b) The resistor is connected. 3. The voltage drop Ves across each of resistors A and B was measured as a function of the current Iin the resistor. The results are shown in the table: RESISITORA RESISTORB 1(A) VW 1(A) V.M 0.50 2.55 0.50 1.94 1.00 3.11 1.00 3.88 2.00 3.77 2.00 7.76 4.00 4.58 4.00 15.52 (a) For each resistor, graph Va as a function of I and graph the resistance R-Vas/I as a function of l. (b) Does resistor A obey Ohm's law? Explain. (c) Does resistor B obey Ohm's law? Explain. (d) What is the power dissipated in A if it is connected to a 4.00 V battery that has negligible internal resistance? (e) What is the power dissipated in Bif it is connected to the battery? 4. The circuit in the drawing contains five identical resistors. The 45-V battery delivers 58 W of power to the circuit What is the resistance R of each resistor? R3 45 V WW RS w RA 5. When applying Kirchhoff's loop rule, does the sign (ordirection) of a battery's emf depend on the direction of current through the battery? What about the terminal voltage? 6.A4.6-uf capacitor is charged to 5.3-V. It is then connected in series with a 3.7-MQ resistor and connected to a 12-V battery. How long after being connected to the battery will the voltage across the capacitor be 8.2 V?