Waec 2022 Physics Question 9

Practice essay / theory question 9 from the 2022 Waec Physics examination. This question covers Statistics .

Waec 2022 Physics Essay / Theory 3 Difficulty

Topic: Statistics

Question 9 WAEC • 2022 • PHYSICS • essay

9a(i) State coulomb's law of electrostatics. (ii) The electron and proton of a hydrogen atom are separated by a mean distance of \( 5.2 \times 10^{-11} \mathrm{~m} \). Calculate the magnitude of the electrostatic force between the particles, \( \left[e=1.6 \times 10^{-19} C,\left(4 \pi \varepsilon_{0}\right)^{-1}\right. \left.=9.0 \times 10^{9} m F^{-1}\right] \). b(i) The diagram below shows a potential divider circuit. I. Show that \( V_{\text {out }}=V_{\text {in }}\left(\frac{R_{2}}{R_{1}+R_{2}}\right) \). II. If \( \frac{V_{\text {in }}}{V_{\text {out }}}=2.5 \) and \( R_{1}=30 \Omega \), calculate \( R_{2} \). (ii) Define the volt. (c) Explain why wood is not suitable for use as the core of transformers. (d) State one application of the cathode ray tube.

Question Parts

( a )

(i) State coulomb's law of electrostatics.

( a )

(ii) The electron and proton of a hydrogen atom are separated by a mean distance of \( 5.2 \times 10^{-11} \mathrm{~m} \). Calculate the magnitude of the electrostatic force between the particles, \( \left[e=1.6 \times 10^{-19} C,\left(4 \pi \varepsilon_{0}\right)^{-1}\right. \left.=9.0 \times 10^{9} m F^{-1}\right] \).

( b )

(i) The diagram above shows a potential divider circuit. I. Show that \( V_{\text {out }}=V_{\text {in }}\left(\frac{R_{2}}{R_{1}+R_{2}}\right) \). II. If \( \frac{V_{\text {in }}}{V_{\text {out }}}=2.5 \) and \( R_{1}=30 \Omega \), calculate \( R_{2} \).

( b )

(ii) Define the volt.

( c )

Explain why wood is not suitable for use as the core of transformers.

( d )

State one application of the cathode ray tube.

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Waec 2022 Physics Question 9. It is one of the essay questions from the 2022 Waec Physics examination.

The question covers Statistics .

Difficulty level: 3 .

View More Waec 2022 Physics Questions More Waec Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Chat with Support