A 4 A fuse wire can withstand a maximum power of 3 W in circuit. The resistance of the fuse wire is: a. 0.75 0 O b. 5.33 2 O c. 0.1875 2 O d. 120 The electric force acting on an electron placed in a downward electric field of magni tude 3x 106 N/C is, a. 4.8 x 10-13 N, upward O b. 5.33 x 1026 N, downward O c. 4.8 x 10-13 N, downward d. 5.33 x10-26 N, upward

A 4 A fuse wire can withstand a maximum power of 3 W in circuit. The resistance of the fuse wire is: a. 0.75 0 O b. 5.33 2 O c. 0.1875 2 O d. 120 The electric force acting on an electron placed in a downward electric field of magni tude 3x 106 N/C is, a. 4.8 x 10-13 N, upward O b. 5.33 x 1026 N, downward O c. 4.8 x 10-13 N, downward d. 5.33 x10-26 N, upward

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 9PE: (a) A defibrillator passes 12.0 A of current through the torso of a person for 0.0100 s. How much...

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A potential difference of 1.00 V is maintained across a 10.0- resistor for a period of 20.0 s. What total charge passes by a point in one of the wires connected to the resistor in this time interval? (a) 200 C (b) 20.0 C (c) 2.00 C (d) 0.005 00 C (e) 0.050 0 C
When a straight wire is heated, its resistance changes according to the equation R = R0 [1 + (T T0)] (Eq. 17.7), where is the temperature coefficient of resistivity. (a) Show that a more precise result, which includes the length and area of a wire change when it is heated, is R=R0[1+(TT0)][1+(TT0)][1+2(TT0)] where is the coefficient of linear expansion. (See Topic 10.) (b) Compare the two results for a 2.00-m-long copper wire of radius 0.100 mm, starting at 20.0C and heated to 100.0C.
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