Suppose there are three light switches outside a room. Inside is a single light bulb, controlled by one of the three switches. You need to determine which switch operates the bulb. You can turn the switches on and off as many times as you wish (they are all off to begin with), but may only enter the room once. There is no one there to help you. The door to the room is closed, and there are no windows, so you cannot see inside. How can you discover which switch operates the bulb?
Submitted by: AdministratorDo the following steps:
☛ 1. Turn ON two switches, and leave one OFF.
☛ 2. Wait a few minutes.
☛ 3. Turn one switch from ON to OFF. One is now ON and two are OFF
☛ 4. Enter the room. - If the light is ON, it is controlled by the switch you left ON. - If the light bulb is OFF, touch it. If it is warm it is controlled by the switch you turned ON and OFF. If it is cold, it is controlled by the switch you never turned on.
Submitted by: Administrator
☛ 1. Turn ON two switches, and leave one OFF.
☛ 2. Wait a few minutes.
☛ 3. Turn one switch from ON to OFF. One is now ON and two are OFF
☛ 4. Enter the room. - If the light is ON, it is controlled by the switch you left ON. - If the light bulb is OFF, touch it. If it is warm it is controlled by the switch you turned ON and OFF. If it is cold, it is controlled by the switch you never turned on.
Submitted by: Administrator
Read Online Marine Engineer Factory Trawler Chief Job Interview Questions And Answers
Top Marine Engineer Factory Trawler Chief Questions:
☺ | Why do you want to join our company? |
☺ | Are You a ‘People' Person? |
☺ | Do you work well on a team? How would you define teamwork? |
☺ | Explain me about a challenge or conflict you've faced at work As Marine Engineer Factory Trawler Chief, and how you dealt with it? |
☺ | How do you imagine a typical day of an employee in our company As Marine Engineer Factory Trawler Chief? |
Top Security Categories
☺ | Safety Officer Interview Questions. |
☺ | Security Guard Interview Questions. |
☺ | Information Security Officer Interview Questions. |
☺ | Sheriff Interview Questions. |
☺ | Protocols Officer Interview Questions. |