BMAT Physics - Electricity + Formulae | BMAT Crash Course Online | Summary and Q&A

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October 4, 2018
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Ali Abdaal
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BMAT Physics - Electricity + Formulae | BMAT Crash Course Online

TL;DR

This video provides an introduction to the basics of electricity in the BMAT exam, explaining key definitions and formulas.

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Key Insights

  • 😷 The video is part of an online BMAT crash course designed to help students succeed in the medical school admission exam.
  • ⁉️ Understanding electricity is important for the BMAT physics section, as questions related to electricity frequently appear.
  • 🤩 Key definitions in electricity include charge, current, voltage, resistance, and power.
  • 🇨🇻 Six essential formulas connected to electricity, such as V = e / Q and P = I * V, need to be memorized by BMAT test-takers.
  • 🤬 The symbols and units for charge, current, voltage, resistance, and power should be used correctly to avoid confusion.
  • ⚡ Ohm's law, expressed as V = I * R, explains the relationship between voltage, current, and resistance.

Transcript

hey guys welcome back to the channel if you new here my name is Ali I'm a junior doctor working in Cambridge and I'm also the co-founder of a company called six met and we've been running courses for the beam at the UK cat and interviews to help students get into medical school for hundreds of students every year since 2013 and in this video I'm go... Read More

Questions & Answers

Q: What is charge and how is it related to electricity?

Charge is a physical property of matter that refers to the flow of electrons. In the context of electricity, charge denotes the flow of electrons in a circuit and is measured in coulombs (C).

Q: How is current defined and what is its symbol and unit?

Current is the rate of flow of charge, or the speed of electrons traveling in a circuit. It is denoted by the symbol I and measured in amperes (A).

Q: What is voltage and how is it measured?

Voltage, also known as potential difference, measures the amount of energy or pushing power that electrons have as they travel through a circuit. It is symbolized by V and measured in volts (V).

Q: What is resistance and how is it measured?

Resistance refers to the opposition faced by electrons as they flow through a circuit. It is measured in ohms (Ω) and is denoted by the symbol R.

Q: What is power and how is it calculated?

Power is the rate at which energy is transferred or used per second. It is measured in watts (W) and can be calculated using the formula P = E / t, where P is power, E is energy, and t is time.

Q: What is Ohm's law and how is it expressed?

Ohm's law states that the voltage across a resistor is directly proportional to the current flowing through it. It is expressed by the formula V = I * R, where V is voltage, I is current, and R is resistance.

Q: Can you provide an example of using the formulas in a BMAT physics question?

Sure! Let's say we have a question that provides the current (I) as 2A and the voltage (V) as 5V. We can use the formula P = I * V to calculate the power, which would be 10W in this case.

Q: What are the key symbols and units that need to be memorized for electricity in the BMAT?

It is essential to memorize the symbols Q (charge), I (current), V (voltage), R (resistance), P (power), and their corresponding units, including coulombs (C), amperes (A), volts (V), ohms (Ω), and watts (W).

Summary & Key Takeaways

  • The video is part of an online BMAT crash course that aims to guide students through the technique and theory needed to do well in the exam.

  • The focus of this particular video is on electricity, which is an important topic in the BMAT physics section.

  • The video covers key definitions such as charge, current, voltage, resistance, and power, and introduces six important formulas related to electricity.

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