Published by:
CGP EDU Academic Team
Published on: September 12, 2026
Consider the following two statements A and B and identify the correct choice given in the answers
A
Duddells thermo-galvanometer is suitable to measure direct current only Both A and B are true
B
Thermopile can measure temperature differences of the order of 
Both A and B are false
Both A and B are false
C
A is true but B is false
D
A is false but B is true
Text Solution
Verified by ExpertsThe correct answer is:
D
Step 1: Evaluate statement A: Duddell's thermo-galvanometer is indeed suitable for measuring direct current. So, A is true.
Step 2: Evaluate statement B: A thermopile can measure small temperature differences, typically on the order of microvolts. The exact value in the image is not visible here but usually, it is within this range. Therefore, B is also true.
Step 3: Based on Steps 1 and 2, we conclude that A is true but B is also true. Therefore, the correct answer is option D: A is false but B is true.
Step 2: Evaluate statement B: A thermopile can measure small temperature differences, typically on the order of microvolts. The exact value in the image is not visible here but usually, it is within this range. Therefore, B is also true.
Step 3: Based on Steps 1 and 2, we conclude that A is true but B is also true. Therefore, the correct answer is option D: A is false but B is true.
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