Announcements:

1. Announcements:

2. 1 of 3 • Wire A and wire B both have the same resistivity and the same resistance. Wire B is twice as long as A. The radius of wire B must be • Half that of A. • Greater than half, but less than A. • Equal to that for A. • Greater than A, but less than twice. • Twice that for A. A 2

3. 2 of 3 • Each light bulb as resistance R. The resistance presented to the battery by the light bulbs in circuit B is • Twice that seen in circuit A. • Equal to that seen in circuit A. • Half that seen in circuit A. • Undeterminable without knowing the current. A B + + 3

4. 3 of 3 • Each light bulb as resistance R. The resistance presented to the battery by the light bulbs in circuit B is • Twice that seen in circuit A. • Equal to that seen in circuit A. • Half that seen in circuit A. • Undeterminable without knowing the current. A B + + 4

5. Announcements: 5

6. 1 of 3 • Wire A and wire B both have the same resistivity and the same resistance. Wire B is twice as long as A. The radius of wire B must be • Half that of A. • Greater than half, but less than A. • Equal to that for A. • Greater than A, but less than twice. • Twice that for A. A 6

7. 2 of 3 • Each light bulb as resistance R. The resistance presented to the battery by the light bulbs in circuit B is • Twice that seen in circuit A. • Equal to that seen in circuit A. • Half that seen in circuit A. • Undeterminable without knowing the current. A B + + 7

8. 3 of 3 • Each light bulb as resistance R. The resistance presented to the battery by the light bulbs in circuit B is • Twice that seen in circuit A. • Equal to that seen in circuit A. • Half that seen in circuit A. • Undeterminable without knowing the current. A B + + 8

9. PROJECTION SCREEN 1 4 1 4 1 4 1 4 2 5 2 5 2 5 2 5 3 6 3 6 3 6 3 6 HAND IN TODAY’S ACTIVITIES SHEETS 9