current is increased to 3.0 A? 2. A device is connected to a 210 V source. How much current is flowing if it has a resistance of (a) 22 Q? (b) 24 Q? A battory Uses a curron+ of 10.0 A for 1 0b lal How much chargo nassoc through the battory? bl How many
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- A student uses a 100.00-W, 115.00-V radiant heater to heat the student’s dorm room, dining the hours between sunset and sunrise, 6:00 p.m. to 7:00 a m. (a) What current does the heater operate at? (b) How many electrons move through the heater? (c) What is the resistance of the heater? (d) How much heat was added to the dorm room?An aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the absolute value of the charge density in the wire? (b) What is the drift velocity of the electrons? (c) What would be the drift velocity if the same gauge copper were used instead of aluminum? The density of copper is 8.96 g/cm3 and thedensity of aluminum is 2.70 g/cm3. The molar mass ofaluminum is 26.98 g/mol and the molar mass of copper is 63.5 g/mol. Assume each atom of metal contributes one free electron.Direction: Solve the problem as directed. Write your answers on this answer sheet. (1) A silver wire 1.00 mm in diameter transfers a charge of 65.0 C in 1 hr. 15.0 min. Silver contains 5.0 x 1028 electrons per cubic meter. What is the current in the wire? What is the magnitude of the drift velocity of the electrons in the wire?
- The heating element of a simple heater consists of a 2.0-m-long, 0.60-mm-diameter nichrome wire. When plugged into a 120 V outlet, the heater draws 8.0 A of current when hot.a. What is the wire’s resistance when it is hot?b. Use your answer to part a to calculate the resistivity of nichrome in this situation. Why is it not the same as the value of ρ given for nichrome in the given table?A steel wire, of length L and diameter D, has a resistance of 100 . What current would flow through a silver wire of the same diameter and the same length if a 13.0 V potential difference were applied across its length? Express your answer in amperes. I = ΠΫΠΙ ΑΣΦ ! You have already submitted this an No credit lost. Try again. Submit ? Previous Answers Request Answer A Enter a new answer.An electrical conductor designed to carry large currents has a circular cross section 2.10 mm in diameter and is 13.0 m long. The resistance between its ends is 0.102 N. What is the resistivity of the material?5 Express your answer in ohm-meters. p= N.m Submit Request Answer Part B If the electric field magnitude in the conductor is 1.24 V/m, what is the total current? Express your answer in amperes. ? I = A Submit Request Answer Part C If the material has 8.5 x 1028 free electrons per cubic meter, find the average drift speed under the conditions of part B. Express your answer in meters per second. Πνα ΑΣΦ ? v = m/s
- Please determine what is asked 1. The resistance of a wire is R ohms. It is stretched to ten times its original length. What is the new resistance of the wire (in terms of R)? 2. The resistance of a wire of uniform diameter d and length I is R. Find the resistance (in terms of R) of another wire of the same material but with diameter 2d and length 41.An unknown wire in a circuit has a circular cross-section with diameter 4.8 mm. It carries a current of 2.1 mA. A. What is the current density, in milliamperes per square centimeter, in this wire? B. If you assume the drift velocity in this wire is 1 × 10-2 cm/s, what is the density of charge carries per cubic centimeter? C. If the conductivity in this wire is 3.5 × 106 Ω-1 m-1, what is the average time between collisions, in nanoseconds?Solve the following Physics problem. Show your solutions. Round off your final answer in a whole number. A cell has a terminal voltage of 50 V for a current of 10.0 A and 54 V for a current of 6.0 A. Find the electromotive force and internal resistance of the cell.
- A 2 0 resistor, a 10 N resistor, and a 15 N resistor are connected in parallel across a 12 V battery. Determine the equivalent resistance for the circuit. Answer in units of N. 026 (part 2 of 2) . b) Determine the current in the circuit. Answer in units of A.ostro Imssb1.mutah.edu.jo/r A conductor has a cross-sectional area of 2.3x 10-6 m2 and the number of free electrons per unit volume is 8.5x 1028 electron/m. When the current is 9 A, find the drift speed (in mm/s) of the electrons. Use the charge of the electron to be 1.6x 10-19 CDirections: Read and analyse the following problems. Show the complete solution of each problem in your answer sheet. 1. What is the resistance of a 30 m silver wire with a diameter of 2 mm? 2. A carbon wire with a 3 mm diameter has a resistance of 100 ohms. How long is the wire? 3. A 200 m long aluminum wire has the same resistance and cross-sectional area as a carbon wire. What is the length of the carbon wire? 4. A wire made of an unknown substance has a resistance of 125 m2. The wire has a length of 1.8 m and a cross- sectional area of 2.35x10-5 m2. What is the resistivity of the substance from which the wire is made?