Operating a DC load incorporating the use of proximity sensor and timer circuit

Q1. What is the primary function of a proximity sensor in a DC load circuit?

a. To measure temperature

b. To detect the presence of nearby objects without physical contact

c. To regulate voltage levels

d. To convert AC to DC

Q2. What is the purpose of a timer circuit in a DC load operation?

a. To amplify the current

b. To delay the switching operation of the load

c. To measure the power consumption

d. To convert DC to AC

Q3. Which component is commonly used to build a simple timer circuit?

a. Resistor

b. Capacitor

c. 555 timer IC

d. Transistor

Q4. In a DC load circuit, what is the typical role of a relay?

a. To store electrical energy

b. To act as a switch that is operated electrically

c. To measure the current

d. To provide illumination

Q5. What happens when the proximity sensor detects an object in a DC load circuit with a timer?

a. The load is immediately turned off

b. The timer starts counting down or up to control the load operation

c. The circuit resets itself

d. The load remains unaffected