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- The human body can exhibit a wide range of resistances to current depending on the path of the current, contact area, and sweatiness of the skin. Suppose the resistance across the chest from the left hand to the right hand is 1.0 106 . (a) How much voltage is required to cause possible heart fibrillation in a man, which corresponds to 500 mA of direct current? (b) Why should rubber-soled shoes and rubber gloves be worn when working around electricity?A 20.00-V battery is used to supply current to a 10-k resistor. Assume the voltage drop across any wires used for connections is negligible, (a) What is the current through the resistor? (b) What is the power dissipated by the resistor? (c) What is the power input from the battery; assuming all the electrical power is dissipated by the resistor? (d) What happens to the energy dissipated by the resistor?The thin copper wire with radius of 1.3 mm is wound into a torus shaped coil as revealed in figure.From copper wire 8.75 x 10-2ampere electric current passing though in 4800 sec. Number of free electronsper cubic meter in copper wire is 5.8 x 1028. Calculate magnitude of electron’s drift velocity in the diameter of copper wire.
- Find the resistance between the inner and the outer curved surfaces of the block shown below, where the material is Silver o = 6.17 x 10°S/m. If the same current crosses both inner and outer curved surfaces J = 1ô A/m?. %3D Assume: Pa = 2 cm, po = 6 cm, ø = 20°. and z = 5 cm 113 Po P. O a. B.16 un O b. 6.12 un Oc 30.606 u Od. 4.59 u 1030=9634 Given that the delivered power to a resistor is equal to P when the current flowing in the resistor is la If the current increased to 8.3 la, the delivered power to the resistor will be: Select one: OA. 8.3 P OB. 16.6 P OC. 1378 P OD.0.1P OE 68.9 P Next page 901 PM 4ENG 4/30/2021 Prise Inser Delete FIL 10 Num Lock Backspace 本 6 17 V 12 7 8 9. T. Home Pyup 1 GYH J -IK IL 4 Enter 1 Shift 3 B YN M End Pon 01 AlH Crl Ins Home PgOn End1. The current passing through a conductor is described by I(t) = I。 e¯t/¹. If lo 2A and T = 0.5 s, how many electrons flow through the conductor during the first 3 seconds? Take e 1.6 × 10-¹⁹ C.
- The thin copper wire with radius of 1.3 mm is wound into a torus shaped coil as revealed in figure.from copper wire 8.75 x 10-2ampere electric current passing though in 4800 sec. Number of free electronsper cubic meter in copper wire is 5.8 x 1028. Calculate magnitude of electron’s drift velocity in thediameter of copper wire. Note: Solve as soon as possibleSuppose we have a steady current / in a wire of cross-sectional area A and length L. The current enters the wire at the end a and leaves at end b. The potential difference across the wire is electric field is given by Va-Vb =Vab = EL Vab =pJ%3p- The LA new expressure for the potential difference is given The SI unit of resistance is one ohm R=p- A by Vab=pL- = IR A Where %3D (1 Q). A resistor is a device made to have a certain resistance. If the potential difference is 6.0 V across a 4.0-k2 resistor, what is the current through it? 1.5 x10-A 15 x10-3A 4 x 10 A 4.0 x 10-3 A Click Save and Submit to save and submit. Click Save All Answers to save all answers.Find the resistance between the inner and the outer curved surfaces of the block shown below, where the material is Silver o = 6.17 × 10®S/m. If the same current crosses both inner and outer curved surfaces J = 1 , A/m?. %3D Assume: Pa = 2 cm, pb = 6 cm, o = 20°. and z = 5 cm %3D Po Pe O a. 8.16 µn O b. 6.12 µn O c. 30.606 µ O d. 4.59 un O e. 10.20 un O f. 15.30 un
- In Fig.22, the wire bent in the form of semi-ellipses with semi-axes a=20 cm, b=10cm, c=10cm, d=5 cm, is made of a material with resistivity p = 1.72x10-8 2m, and section diameter D=4 mm. Find the current (I) in the wire, if the potential difference is AV=4 mV. b AV 0. Fig.22 ane left 1:29:15 stion 1 How many electrons per second pass through a section of wire carrying a current of wet 0.70 A? ered d out of Select one: 1.1 x 10-19 electrons/s question 4.4 x 1018 electrons/s 6.2 x 10° electrons/s 7.7 x 1029 electrons/sTaking R=2.30 k2 and = 370 V in the figure shown below, determine the magnitude and direction of the current in the horizontal wire between a and e. magnitude mA direction from a to e R www AR 8✔ 2R www 3R 28