TestUstad

A 1kW radio transmitter operates at a frequency of 880 kHz. How many quanta per second does it emit?

Correct answer: B. B) 1.71x10³⁰

  • A. A) 1.71x10²¹
  • B. B) 1.71x10³⁰
  • C. C) 6.02x10²³
  • D. D) 2.85x10²⁶

Explanation

First, find the energy of a single quantum (photon) using E = hf. Then, divide the total power of the transmitter (1000 J/s). by the energy per quantum to find the number of quanta emitted per second. The result is approximately 1.71 x 10³⁰.

Written and checked by , M.Phil ChemistryLast updated
Report an error

The more specific you are, the faster it gets fixed. A source beats an opinion.

Prefer email? [email protected]

About Atomic Structure

Atomic structure covers the discovery of the proton, Planck's quantum theory, hydrogen emission spectra and the evidence for quantized energy levels. You will use quantum numbers to describe orbitals, distinguish s, p, d and f orbital shapes, and write electronic configurations, including the correct order of electron filling.

Practise Atomic Structure

922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Start a free Atomic Structure testAll Atomic Structure MCQs

Discussion

Stuck on an option, or know a faster way to get there? Ask or explain it here.

No comments yet. Be the first to explain this one.

Exams that ask Chemistry questions like this

Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

Lecturer Chemistry Test Chemistry80 MCQsSubject Specialist Chemistry Test Chemistry80 MCQsDUHS Chemistry45 MCQsETEA MDCAT Chemistry45 MCQsKMU Chemistry45 MCQsMDCAT Chemistry45 MCQsNUMS Chemistry40 MCQsECAT Chemistry30 MCQsETEA Engineering Admission Test Chemistry30 MCQsGIKI Chemistry30 MCQsNED Chemistry30 MCQsNET Chemistry30 MCQsPIEAS Chemistry30 MCQsBSN Entry Test Chemistry25 MCQs

More Atomic Structure questions

If Rutherford had used β⁻ particles instead of α-particles in his gold-leaf experiment, which observation from the original experiment would not occur?

Photons having energy equivalent to the binding energy of the 4th state of a He⁺ ion are used on a metal surface with a work function of 1.4 eV. If electrons are further accelerated through a potential difference of 4V, the minimum de-Broglie wavelength associated with the electron is:

The total number of electrons in Cu²⁺ for which the summation of the azimuthal quantum number (l) and magnetic quantum number (m) is zero is:

The ratio of the e/m values of a proton and an α-particle is:

Four sets of values of quantum numbers (n, l, m, and s). are given below. Which of these does not provide a permissible solution of the wave equation?

The electronic configuration of Fe³⁺ is: