CUET · PHYSICS · PYQ PAPER 2025
In transmission of power from generation plants to users, transformers are used. Identify the correct reason to choose appropriate transformers.
(A) A step-up transformer is used at the generation plant and high voltages are transmitted.
(B) A step-down transformer is used at the generation plant and low voltages are transmitted.
(C) A step-up transformer lowers the current and hence loss due to joule heating is less.
(D) A step-down transformer lowers the current and hence loss due to joule heating is less.
Choose the correct answer from the options given below:
- A (A) and (C) only
- B (A) only
- C (B) and (D) only
- D (D) only
Answer & Solution
Correct Answer
(A) (A) and (C) only
Step-by-step Solution
Detailed explanation
(A) and (C) only Reason (A) is correct: A step-up transformer is used at the generation plant to increase the voltage to very high levels for transmission over long distances. Reason (C) is correct: Power ( \(P\) ) is the product of voltage ( \(V\) ) and current ( \(I\) ),…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- Two capacitors of capacitances C and 4C at potentials 40 V and 60 V, respectively are connected in parallel. The common potential of the combination isCUET 2025 Hard
- The electric field amplitude of an electromagnetic wave is \(100 N C ^{-1}\) and its frequency is 50 MHz . What is the magnitude of wave vector \(k\), (given speed of electromagnetic wave is \(3 \times 10^8 m s ^{-1}\) )CUET 2023 Medium
- In the equation \( P = \frac{E}{c} \), where \( P \) is momentum, \( E \) is energy and \( c \) is the speed of light, this equation is valid in which of the following cases:CUET 2023 Hard
- A thin infinite line charge has linear charge density of \( 2.0 \times 10^{-9} \text{ C/m} \). The electric field intensity at a distance of 3 m from the line charge is : (\( \frac{1}{4\pi\epsilon_0} = 9 \times 10^9 \))CUET 2023 Medium
- An equiconvex lens has a focal length of 20 cm and its radius of curvature is 30 cm. Its refractive index is:CUET 2023 Medium
- A metal plate is getting heated: It can be because
A. a direct current is passing through the plate
B. it is placed in a time varying magnetic field
C. it is placed in space varying magnetic field, but doesn't vary with time.
D. an alternating current passing through the plate
E. it is placed between the pole pieces of a magnet
Choose the correct answer from the options given below:CUET 2023 Medium
More PYQs from CUET
- Match List - I with List - II.
List - I List - II (A) Orbital radius of electron (I) \( \propto \frac{1}{n} \) (B) Orbital velocity of electron (II) \( \propto n \) (C) Orbital frequency of electron (III) \( \propto \frac{1}{n^3} \) (D) Angular momentum of electron List (IV) \( \propto n^2 \)
Choose the correct answer from the options given below:CUET 2023 Medium - (A) The degree of differential equation \(\frac{d^2 y}{d x^2}+\sin \left(\frac{d y}{d x}\right)=0\) is 2
(B) The degree of differential equation \(\frac{d}{d x}\left(\frac{d y}{d x}\right)+\left(\frac{d y}{d x}\right)^3+\sin x=0\) is 1
(C) The order of differential equation \(2 x^2 \frac{d^2 y}{d x^2}-3 \frac{d y}{d x}+y=0\) is 2
(D) The number of arbitrary constants in a particular solution of a differential equation of third order are 3
(E) The integrating factor of the differential equation \(\frac{d y}{d x}-y=\cos x\) is \(e^{-x}\)
Choose the correct answer from the options given below:CUET 2023 Hard - Huygen's principle allows us to understand and determine.CUET 2023 Easy
- What is the total electric flux coming out from a closed surface enclosing an alpha particle? Given \(e=1.6 \times 10^{-19} C\)CUET 2023 Hard
- Which one of the following events does not occur during gene regulation in eukaryotes?CUET 2025 Easy
- A circuit containing a \( \frac{2}{\pi} \text{ H} \) inductor, a \( \frac{40}{\pi} \text{ } \mu\text{F} \) capacitor and a \( 50 \text{ } \Omega \) resistor in series are connected to an a.c. source of emf \( v = 230 \sin 314t \). The amplitude of the current in the circuit isCUET 2025 Easy