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## Class 10 Physics (India)

### Course: Class 10 Physics (India)>Unit 4

Lesson 2: Magnetic fields due to straight wire carrying electric current

# Right hand thumb rule (& solved numerical)

Let's learn how to use the right-hand thumb rule to find the direction of the magnetic field around a current carrying wire. Created by Mahesh Shenoy.

## Want to join the conversation?

• 1. At , Mahesh stated that if the electrons is moving downwards, electric current will be moving upwards towards as electric current moves towards the positive charge. I would like to clarify my understanding on this - we learnt in circuits that electrons move in an opposite direction from the conventional current (which moves from positive to negative). Is this the concept he is referring to? 2. Additionally, I would also like to ask for such questions, is it correct to say that we cannot determine the magnetic field based on the electron but on the electric current?
• Yes, he is referring to conventional current. The right-hand thumb rule is applicable only to the conventional current and not the actual current.
• I like the word play on numericals in this video ("New Miracles" as the chapter name). Great video too, I understood everything you said :)
• This would perfectly fit the "Tips & Thanks" section!
(1 vote)
• what is meant by " the magnetic field on the top"?
(1 vote)
• In the second example problem we cant define a particular direction.because it depends on the direction we stand()
• Yes that is true. That is why Mahesh Shenoy said to his NORTH. Not North in general...North as in reference to your position, the position you are standing in.