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- What is the current in milliamperes produced by the solar cells of a pocket calculator through which 4.00 C of charge passes in 4.00 h?51&page=1 What is the resistance (in units of Q) of a wire made of a material with a resistivity of 3.2 x 10-8 Q. m, if its length is 10.7 m and its diameter is 0.50 mm? Select one: O A. 6.02 OR. 0.67 OC.0.44 OD. 3.88 OE. 1.74 Next page 601 AM A O G d ENG 4/15/2021What is the resistance (in units of Q) of a wire made of a material with a resistivity of 3.2 × 10-8 Q . m , if its length is 22.2 m and its diameter is 0.50 mm? Select one: A. 8.06 B. 3.62 C. 12.50 D. 1.40 E. 0.90
- 5. How many free electrons are there in a rectangular block of a conductor whose dimension is 8 m by 4 m by 3 m? The electrons of this conductor have a drift velocity of 4 m/s when a 9.6 A of current is applied thru a cross-sectional area of 0.005 m?. Use electronic charge of 1.6 x 10-19 coulomb per electron. Express your answer in scientific notation whose unit is electrons per cubic meter.Find the resistance(in the unit of Ohm) of a Nichrome rod of diameter d=1 mm and has a length L=9 m (resistivity of Nichrome, p= 1.8x 10-°0.m) a. 0.1436 b. None c. 0.0004251 d. 0.04124 e. 0.020622. The resistance of a certain conductor , 300 mil diameter and 20 ft long is 200 x10^-3 N. Calculate its resistivity in micro-ohms (µ-2). 3. Determine the thermal coefficient of resistance of copper at 50°C, then use this value to
- 1. Find the ratio of the resistances of a copper wire to an aluminum wire if the length and diameter of the aluminum wire is twice the diameter of the copper. 2. A copper wire has a resistance of 15.0Ω at a temperature of 14°C. After a current passes through the windings, the resistance rose to 12°Ω. To what temperature was the wire heated?1. Solve the following resistance problems: a. A 4.2 cm long copper wire has a cross-sectional area of 3.7 mm2. Determine the resistance of that wire. Check the resistivity of copper int the table given in the textbook. (1.72 x 10) b. Consider a 1.6 cm long silver wire. What is the cross-sectional area of the wire for it to have a resistance of 2.2 x 10-2 Q.1. A wire 300 m long has a resistance of 1.18 Ω and a cross-sectional area of 14 mm2. Of what material is the wire made? 2. A 50 m long wire with a cross-sectional area of 5.5 mm2 has a resistance of 31 Ω at 0 °C. Calculate the resistivity of the wire at 60 °C if the temperature coefficient of resistance at 0 °C is 0.0003 per °C.
- Asap1. Find the drift velocity of electrons in a copper wire with a diameter of 130 mm if it carries a current of 10 amperes. 2. What should be the length and cross-sectional area of a wire for it to have a resistance of 80 from a 5 - cm3 metal that has a resistivity of 9 x 10-8 - m.A piece of wire of length 31.5 cm and cross-sectional area 227.4 cm² is made into a resistor of resistance 713.8 ohm. What is the resistivity of the material used to create the resistor? O a. 5113020.78 ohm-metre O b. 10.04 ohm-metre O c. 5152.96 ohm-metre d. 98.88 ohm-metre Oe. 51.53 ohm-metre Of. 515295.62 ohm-metre O g. 0.10 ohm-metre Oh. 0.99 ohm-metre