Question:
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : An ADC converts digital signal into Analog signals.
Reason (R) : DAC performs the inverse operation of ADC.
In the light of the above statements, choose the most appropriate answer from the options given below :
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : An ADC converts digital signal into Analog signals.
Reason (R) : DAC performs the inverse operation of ADC.
In the light of the above statements, choose the most appropriate answer from the options given below :
Show Hint
Remember:
\[
\text{ADC : Analog } \rightarrow \text{ Digital}
\]
\[
\text{DAC : Digital } \rightarrow \text{ Analog}
\]
Updated On: May 22, 2026
- Both (A) and (R) are correct and (R) is the correct explanation of (A)
- Both (A) and (R) are correct but (R) is not the correct explanation of (A)
- (A) is correct but (R) is not correct
- (A) is not correct but (R) is correct
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The Correct Option is D
Solution and Explanation
Concept:
ADC and DAC are fundamental data conversion devices.
• ADC = Analog to Digital Converter
• DAC = Digital to Analog Converter ADC converts analog signals into digital form, while DAC performs the reverse process.
Step 1: Analyzing Assertion (A). Assertion says: \[ \text{ADC converts digital signal into analog signals} \] This statement is incorrect. Actually: \[ \text{ADC converts Analog } \rightarrow \text{ Digital} \] Examples:
• microphone signal digitization,
• sensor signal conversion,
• digital measurement systems. Thus Assertion is false.
Step 2: Analyzing Reason (R). Reason says: \[ \text{DAC performs inverse operation of ADC} \] This statement is correct. DAC converts: \[ \text{Digital } \rightarrow \text{ Analog} \] which is exactly opposite to ADC operation.
Step 3: Understanding ADC operation. An ADC samples continuous analog signals and produces binary output. Example: \[ 2.5V \rightarrow 1010_2 \] Thus ADC is an Analog-to-Digital converter.
Step 4: Understanding DAC operation. A DAC accepts digital input and reconstructs corresponding analog output voltage/current. Example: \[ 1010_2 \rightarrow 2.5V \] Hence DAC is inverse of ADC.
Step 5: Selecting the correct option. Therefore:
• Assertion is incorrect,
• Reason is correct. Hence the correct answer is: \[ \boxed{(4)} \]
• ADC = Analog to Digital Converter
• DAC = Digital to Analog Converter ADC converts analog signals into digital form, while DAC performs the reverse process.
Step 1: Analyzing Assertion (A). Assertion says: \[ \text{ADC converts digital signal into analog signals} \] This statement is incorrect. Actually: \[ \text{ADC converts Analog } \rightarrow \text{ Digital} \] Examples:
• microphone signal digitization,
• sensor signal conversion,
• digital measurement systems. Thus Assertion is false.
Step 2: Analyzing Reason (R). Reason says: \[ \text{DAC performs inverse operation of ADC} \] This statement is correct. DAC converts: \[ \text{Digital } \rightarrow \text{ Analog} \] which is exactly opposite to ADC operation.
Step 3: Understanding ADC operation. An ADC samples continuous analog signals and produces binary output. Example: \[ 2.5V \rightarrow 1010_2 \] Thus ADC is an Analog-to-Digital converter.
Step 4: Understanding DAC operation. A DAC accepts digital input and reconstructs corresponding analog output voltage/current. Example: \[ 1010_2 \rightarrow 2.5V \] Hence DAC is inverse of ADC.
Step 5: Selecting the correct option. Therefore:
• Assertion is incorrect,
• Reason is correct. Hence the correct answer is: \[ \boxed{(4)} \]
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