Sensor and Actuators_01

Which of the following is a key function of a sensor?

• Store electrical energy

• Convert physical quantity into electrical signals

• Block signal noise

• Control actuator speed

Incremental position encoders determine distance by:

• Counting rotations

• Measuring voltage difference

• Counting transitions between light and dark patterns

• Calculating magnetic field strength

A Light Dependent Resistor (LDR) is best interfaced using:

• Capacitive divider circuit

• Potential divider circuit

• Inductive coil circuit

• Pulse-width modulation

Which sensor type typically requires AC circuitry for interfacing?

• Resistive sensors

• Capacitive and inductive sensors

• Switch-based sensors

• Thermal sensors

Which actuator is commonly used to create rotary or linear motion in low-power control systems?

• Solenoid

• DC motor

• Ultrasonic speaker

• Thermistor

What is the main role of actuator interfacing in electronic systems?

• Reduce power consumption

• Convert analog signals to digital

• Enable proper power control to actuators

• Increase sensor accuracy

Which actuator type converts electrical energy into sound by vibrating a diaphragm?

• Stepper motor

• Speaker

• Solenoid

• LED

Which characteristic makes LCDs ideal for low-power applications?

• They use high current to glow

• They generate light internally

• They can use ambient light for display

• They operate with inductive signals

Which of the following actuators is suitable for precise stepwise motion control?

• AC motor

• Solenoid

• Stepper motor

• LED

In a switch-based sensor setup, what happens to the output voltage when the switch is closed?

• Output equals supply voltage

• Output equals zero, with possible oscillations due to bounce

• Output becomes negative

• Output shows a sine waveform