Which type of switch is normally closed and opens when pressed?

Which type of switch is normally closed and opens when pressed?

• A. Push
• B. Push-to-Break
• C. On-Off
• D. Relay

Answer: (B)

In this situation, the key idea is how the switch behaves in its resting state versus when you press it. A normally closed contact means the circuit is connected when nothing is pressed. When you press the actuator, the contact opens and the circuit is interrupted. That exact behavior—opening the circuit upon pressing—is called a push-to-break switch. It’s often used when you want the device to cut power or stop a function as soon as a button is pressed, and it returns to the connected state once released. Push-to-break contrasts with push-to-make, where pressing closes the circuit. An on-off switch latches in one state after a press, not necessarily opening immediately when pressed, and a relay is a control device that can use normally closed or normally open contacts, but the action described fits the push-to-break switch best.

In this situation, the key idea is how the switch behaves in its resting state versus when you press it. A normally closed contact means the circuit is connected when nothing is pressed. When you press the actuator, the contact opens and the circuit is interrupted. That exact behavior—opening the circuit upon pressing—is called a push-to-break switch. It’s often used when you want the device to cut power or stop a function as soon as a button is pressed, and it returns to the connected state once released.

Push-to-break contrasts with push-to-make, where pressing closes the circuit. An on-off switch latches in one state after a press, not necessarily opening immediately when pressed, and a relay is a control device that can use normally closed or normally open contacts, but the action described fits the push-to-break switch best.