CUET · PHYSICS · PYQ PAPER 2023
An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii of two wires are in the ratio of 4:3 and 2:3 respectively, the ratio of the currents in the wires will respectively be:
- A 3 : 1
- B 1 : 3
- C 8 : 9
- D 2 : 1
Answer & Solution
Correct Answer
(B) 1 : 3
Step-by-step Solution
Detailed explanation
\( R = \rho \frac{L}{\pi r^2} \) \( \frac{I_1}{I_2} = \frac{R_2}{R_1} = \frac{L_2}{L_1} \left(\frac{r_1}{r_2}\right)^2 \) \( \frac{I_1}{I_2} = \frac{3}{4} \left(\frac{2}{3}\right)^2 = \frac{3}{4} \times \frac{4}{9} = \frac{1}{3} \)
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
- Which of the following statements is correct for a compound microscope?CUET 2025 Medium
- In the context of the Photoelectric effect, identify the statements which support quantum nature of light.
(A) The electric charge of photoelectrons is quantized
(B) The maximum kinetic energy of photoelectrons depends on the frequency of the incident light, but is independent of its intensity
(C) The photoelectric emission is an instantaneous process without any apparent time lag, even when the incident radiation is made exceedingly dim
(D) There is a minimum frequency of light below which no photoelectrons are emitted
Choose the correct answer from the options given below:CUET 2025 Easy - The flux of the electric field \( \vec{E} = 2 \times 10^3 \hat{i} \text{ N/C} \) through a square of 10 cm, on a side whose plane is parallel to the \( xy \) plane is:CUET 2023 Medium
- In a series LCR circuit if the voltage across inductor, capacitor and resistor respectively are 60 V, 30 V and 40 V, then the applied voltage is:CUET 2023 Easy
- A non conducting solid sphere of radius R is uniformly charged. The magnitude of the electric field due to the sphere at a distance r from its center :
A. decreases as r increases, for 0 < r < \(\infty\)
B. increases as r increases, for r < R
C. becomes zero.
D. decreases as r increases, for R < r < \(\infty\)
Choose the correct answer from the options given below:CUET 2023 Easy - The same current is flowing in two AC circuits. The first circuit contains a pure inductor and the second, a capacitor. If the frequency of the AC is increased, then the current will :CUET 2023 Easy
More PYQs from CUET
- \( (1/16) \)th of the initial amount of a certain radio-active isotope remains undecayed after two hours. The half life of the isotope would be :CUET 2023 Easy
- Match List I with List II.
Choose the correct answer from the options given below:LIST I (Placental mammals) LIST II (Australian marsupials) A. Anteater I. Spotted cuscus B. Lemur II. Tasmanian tiger cat C. Bobcat III. Flying phalanger D. Flying Squirrel IV. Numbat CUET 2023 Easy - The cotyledon in the seed of grass family is called :CUET 2023 Easy
- Match List 1 with List 2.
Choose the Correct answer from the options given below :List 1 (Differential equation) List 2 (Sum of order and degree) (A) \(\frac{d^2 y}{d x^2}+\frac{d y}{d x}+3 y=\sin x\) (I) 2 (B) \(\frac{d y}{d x}=\sin (x+y)\) (II) 3 (C) \(\sqrt{1+\left(\frac{d y}{d x}\right)^2}=\frac{d^2 y}{d x^2}\) (III) 4 (D) \(x^2\left(\frac{d^2 y}{d x^2}\right)^3+y\left(\frac{d y}{d x}\right)^4+y^3=0\) (IV) 5 CUET 2025 Medium - Area bounded by \(x=\frac{y^2}{4}\) and its latus rectum is:CUET 2023 Easy
- The speed of a motorboat in still water and that of the current of water is in a ratio of \(27: 5\).
The boat goes along the current from point \(A\) to point \(B\) in 3 hours 40 minutes.
How much time will it take to come back from \(B\) to \(A\)?CUET 2025 Hard