LDR QUIZ

What does LDR stand for?

a) Light Dependent Resistor

b) Light Diode Resistor

c) Linear Dependent Resistor

d) Luminous Dependent Resistor

• A

• B

• C

• D

Which of the following components is primarily responsible for converting light energy into electrical energy in a dark sensing circuit?

a) LED

b) Transistor

c) Resistor

d) LDR

• A

• B

• C

• D

In a dark environment, the resistance of an LDR...

a) Increases

b) Decreases

c) Stays constant

d) Becomes infinite

• A

• B

• C

• D

What type of semiconductor device is a diode?

a) Unipolar

b) Bipolar

c) Triode

d) Quadpole

• A

• B

• C

• D

Which configuration is used for an NPN transistor in this circuit?

a) Common Emitter

b) Common Collector

c) Common Base

d) None of the above

• A

• B

• C

• D

In a dark sensing circuit, the transistor is typically used as a...

a) Voltage regulator

b) Current amplifier

c) Temperature sensor

d) Light emitter

• A

• B

• C

• D

n a dark sensing circuit, if the LDR is replaced with a fixed resistor of equal resistance, what would be the behavior of the LED?

a) LED remains off

b) LED remains on

c) LED blinks

d) LED brightness varies randomly

• A

• B

• C

• D

What effect does increasing the value of the resistor connected in series with the LED have on the brightness of the LED in a dark sensing circuit?

a) Increases brightness

b) Decreases brightness

c) No effect on brightness

d) Turns off the LED

• A

• B

• C

• D

What would happen if the polarity of the LED in a dark sensing circuit is reversed?

a) LED would emit light only in darkness

b) LED would emit light only in brightness

c) LED would not emit light at all

d) LED would emit light continuously

• A

• B

• C

• D

Which of the following configurations is commonly used for connecting an LED in a circuit?

a) Series

b) Parallel

c) Both series and parallel

d) None of the above

• A

• B

• C

• D