Could i please get some help with this, it would mean a lot. Thank you.

1. (Knight Problem 27.3) 1.0 x 1016 electrons flow through a cross section of a silver wire in 320 ms with a drift speed of 8.0 x 10 m/s. What is the diameter of the wire? [Answer: 0.93 mm.] 2. (Knight Problem 27.7) A 2.0x 10-$ V/m electric field creates a 3.5 x 10" electrons/s current in a 1.0-mm-diameter alu- minum wire. What are (a) the drift speed and (b) the mean time between collisions for electrons in this wire? [Answer: a. 7.43 x 10 * m/s. b. 2.1 x 10-14 s] 3. (Knight Problem 27.19) A 15-cm-long nichrome wire is con- nected across the terminals of a 1.5 V battery. a. What is the electric field inside the wire? [Answer: 10 V/m.] b. What is the current density inside the wire? [Answer: 6.7 x 106 A/m2.] c. If the current in the wire is 2.0 A, what is the wire's diameter? [Answer: 0.62 mm.] 4. (Knight Problem 27.31) The terminals of a 0.70 V watch bat- tery are connected by a 100-m-long gold wire with a diameter of 0.10 mm. What is the current in the wire? [Answer: 2.3 mA.]Question 1 In the gure provided a wire consists of two segments made from the same material but with different diameters. lfthe current in segment i is II and the current in segment 2 is 12, which of the following is true about their current densities J1 and J2 in the two segments? 0 J1 is equal to J2 0 J1 is lessthan J2 C J1 is greater than J2 Question 2 If the current in a wire is halved, how will this affect the mean time between collisions? C3 The mean time between collisions will be halved. C3 The mean time between collisions will remain unchanged. /\\ L1 The mean time between collisions will be doubled. Question 3 In the gure provided, a circuit has two resistors R1 = 15.9 S] and R2 = 3.30 9. Which resistor dissipates the larger amount of power? C: R1 : R2 C) R1 C) R2 Question 4 A B C 2 In the figure provided, identical bulbs A, B, and C are all glowing. Which bulb is brightest? O They are all equally bright. O Bulb B O Bulb C O Bulb A