CUET · PHYSICS · PYQ PAPER 2023
What will be the minimum length of antenna required to transmit a radio signal of frequency 10 MHz ?
- A 30 m
- B 15 m
- C 7.5 m
- D 60 m
Answer & Solution
Correct Answer
(C) 7.5 m
Step-by-step Solution
Detailed explanation
\(\lambda = c/f = (3 \times 10^8 \text{ m/s}) / (10 \times 10^6 \text{ Hz}) = 30 \text{ m}\) \(L_{min} = \lambda/4 = 30 \text{ m} / 4 = 7.5 \text{ m}\)
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
- A battery of emf 12 V and internal resistance 3 \( \Omega \) is connected to an external resistor R. If the current in the circuit is 0.6 A, the voltage across the external resistor will beCUET 2025 Medium
- A capacitor of unknown capacitance is connected with a battery of V volts. The charge stored in it is \( 200 \, \mu\text{C} \). When the potential of the capacitor is reduced by 100 volts, the charge stored in it becomes \( 150 \, \mu\text{C} \). The unknown capacitance is:CUET 2025 Hard
- A monochromatic source emitting light of wavelength 600 nm has a power output of 66 W. The number of photons emitted by the source in 2 minutes is: (Given: \( h = 6.6 \times 10^{-34} \text{ Js} \))CUET 2025 Hard
- A proton and a deuteron execute circular orbits having same radii of 0.5 m in a plane perpendicular to a uniform magnetic field B. If the kinetic energy of the deuteron is 50 keV, the K.E. of the proton will beCUET 2025 Hard
- Arrange the following em waves in the order of their increasing wavelength:
A. Visible light
B. Radio waves
C. Gamma rays
D. Ultraviolet rays
Choose the correct answer from the options given below:CUET 2023 Hard - The total charge of an electric dipole is (Where 'q' is the point charge on either side of the dipole and 'e' is the charge of an electron)CUET 2023 Hard
More PYQs from CUET
- Reaction of Ethene with Bromine in CCl\(_4\) will result inCUET 2025 Hard
- A person invested ₹ \(2,50,000\) in a fund.
At the end of the year, the value of the fund is ₹ \(3,00,000\).
If the market price is the same at the end of the year, then the nominal rate of return is :CUET 2025 Medium - Which of the following is not an expression of Dalton's law of partial pressures?CUET 2023 Hard
- What is true about Gauss's "Competitive Exclusion Principle?"
A. Closely related spicies competing for same resources cannot exist indefinitely
B. Totally unrelated species do not compete for the same resource
C. Among the competiting species, competitively inferior species will be eliminated
D. Species facing competition, evolve organs to co-exist
Choose the correct answer from the options given below:CUET 2023 Hard - Two charged particles, placed at a distance d apart in vacuum, exert a force F on each other. Now, each of the charges is doubled. To keep the force unchanged, the distance between the charges should be changed to :CUET 2024 Medium
- A single stranded DNA or RNA, tagged with a radioactive molecule is called as:CUET 2025 Easy