CUET · PHYSICS · PYQ PAPER 2025

A transformer has 400 turns in the primary coil and 8000 turns in the secondary coil. It is connected to a 220 V main supply. The potential difference per turn in secondary coil is

A 1.1 V
B 11 V
C 0.55 V
D 5.5 V

Verified Solution

Answer & Solution

Correct Answer

(C) 0.55 V

Step-by-step Solution

Detailed explanation

\( \frac{V_s}{N_s} = \frac{V_p}{N_p} \) \( = \frac{220}{400} \) \( = 0.55 \text{ V} \)

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

Match List - I with List - II.
List - I List - II
(A) To study crystal structure (I) IR ray
(B) To study structure of nuclei (II) X-ray
(C) Take haze photography (III) UV-ray
(D) Can cause fluorescence (IV) \( \gamma \)-ray

Choose the correct answer from th options given below :

CUET 2023 Hard

Match List-I with List-II (Symbols have their usual meanings)

List-I (Physical Quantity)	List-II (Expression)
(A) Current density	(I) \( \frac{e E \tau}{m} \)
(B) Drift velocity	(II) \( \frac{n e^2 \tau}{m} \)
(C) Conductivity	(III) \( \frac{e \tau}{m} \)
(D) Mobility	(IV) \( n e v_d \)

Choose the correct answer from the options given below:

CUET 2025 Easy

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List - I	List - II
(A) X-rays	(I) Excitation of Atom
(B) UV rays	(II) Oscillating current
(C) y-rays	(III) Sudden retardation of high energy electron
(D) Radiowaves	(IV) Nuclear origin

List-I	List-II
(A) Low mass number nuclei	(I) Medium penetrating power
(B) Electron microscope	(II) Nuclear reactor
(C) Beta decay	(III) Diffracted electron
(D) \( {}^{235}_{92}\text{U} \)	(IV) Fusion

List - I	List - II
(A) To study crystal structure	(I) IR ray
(B) To study structure of nuclei	(II) X-ray
(C) Take haze photography	(III) UV-ray
(D) Can cause fluorescence	(IV) \( \gamma \)-ray