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Questions and Answers
Which instrument is used to measure very small currents in microamperes?
Which instrument is used to measure very small currents in microamperes?
- Faraday
- Hertz
- Galvanometer (correct)
- Ampere
What device converts electrical energy into rotational mechanical energy?
What device converts electrical energy into rotational mechanical energy?
- Electric motor (correct)
- Magnet
- Coil/copper wire
- Double AA battery
Who formulated the concept of electromagnetic induction?
Who formulated the concept of electromagnetic induction?
- Ampere
- Maxwell
- Faraday (correct)
- Hertz
Which type of reflection is also known as diffuse reflection?
Which type of reflection is also known as diffuse reflection?
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Which type of mirror is known as a converging mirror?
Which type of mirror is known as a converging mirror?
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In which part of the electromagnetic spectrum do radio waves have the longest wavelength?
In which part of the electromagnetic spectrum do radio waves have the longest wavelength?
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Study Notes
Measuring Small Currents
- A microammeter is the instrument used to measure very small electric currents in microamperes (µA).
Energy Conversion Device
- An electric motor converts electrical energy into rotational mechanical energy.
Electromagnetic Induction
- The concept of electromagnetic induction was formulated by Michael Faraday, which describes how a changing magnetic field can induce an electric current.
Types of Reflection
- Diffuse reflection occurs when light hits a rough surface and scatters in many directions, as opposed to regular reflection.
Types of Mirrors
- A concave mirror is known as a converging mirror because it converges light rays that are incident upon it.
Radio Waves
- In the electromagnetic spectrum, radio waves have the longest wavelength, typically ranging from one millimeter to thousands of kilometers.
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