CUET · PHYSICS · PYQ PAPER 2023

Choooose the wrong statement:

A Potential difference across the terminals of the cell in a closed circuit is less than its emf.
B Internal resistance of the cell decrease with decrease in temperature of electrolyte.
C Terminal potential difference versus current graph for a cell is a straight line with a negative slope.
D Terminal potential difference when cell is being charged \(\mathbf{V}=\mathbf{E}+\mathbf{I r}\).

Verified Solution

Answer & Solution

Correct Answer

(B) Internal resistance of the cell decrease with decrease in temperature of electrolyte.

Step-by-step Solution

Detailed explanation

As temperature decreases, the viscosity of the electrolyte increases and the mobility of the ions decreases. This makes it harder for charges to move, actually causing the internal resistance to increase. B) Internal resistance of the cell decrease with decrease in temperature…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Explore more questions on app

From CUET

Explore more questions on app

Lens	Power	Aperture
L1	3D	8 cm
L2	6D	1 cm
L3	10D	1 cm

List-l (Term)	List-II (Chromosome formulation)
(A) Diploid	(I) 2n-1
(B) Aneuploidy	(II) 4n
(C) Haploid	(III) n
(D) Polyploidy	(IV) 2n

List-l (Vitamin)	List-II (Deficiency disease)
(A) Thiamine	(I) Convulsions
(B) Pyridoxine	(II) Cheilosis
(C) Vitamin E	(III) Retarded Growth
(D) Riboflavin	(IV) Muscular weakness