Author Question: A silver wire has a cross sectional area A = 2mm2. A total of of 9.4 1018 electrons pass through ... (Read 57 times)

panfilo · **on:** Jul 29, 2018

A silver wire has a cross sectional area A = 2mm2. A total of of 9.4 1018 electrons pass through the wire in a time t = 3s. Silver has nq = 5.8 1028 electrons/m3. What is the drift velocity of these electrons?

A)

2.7 10-5 m/s
B)

9.1 10-5 m/s
C)

5.2 10-5 m/s
D)

1.1 10-5 m/s
E)

7.4 10-5 m/s

Question 2

A coil with a self-inductance of 6 H has a constant current of 2 A flowing through it for 2 seconds. What is the emf induced in this coil?

A)

6 V
B)

12 V
C)

0 V
D)

4 V
E)

8 V