Each switch toggles two lights: A: 1, 2; B: 2, 4; C: 1, 3; D: 3, 4. Throw B, A, C, D to change Figure 1 into Figure 2. Which switch is faulty?Black=on; white=off.
Each switch toggles two lights: A: 1, 2; B: 2, 4; C: 1, 3; D: 3, 4. Throw D, B, A, C to change Figure 1 into Figure 2. Which switch is faulty?Black=on; white=off.
Each switch toggles two lights: A: 1, 2; B: 2, 4; C: 1, 3; D: 3, 4. Throw D, A, B, C to change Figure 1 into Figure 2. Which switch is faulty?Black=on; white=off.
Each switch toggles two lights: A: 1, 2; B: 2, 4; C: 1, 3; D: 3, 4. Throw A, C, D, B to change Figure 1 into Figure 2. Which switch is faulty?Black=on; white=off.