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That’s a good question. I mentioned in the video that you round it to the lowest value but I didn’t explain why. Here’s the explanation: while solving for n (max) we set (theta) = 90, and sin (90) = 1. This is the upper limit on the value of sin (theta) and the answer we got was 3.5. Now if you round it up, you are actually crossing the theoretical limit. In other words, you’re saying sin(90) > 1. Which is not possible. Therefore if you’re using an upper limit for theory, the result should always be rounded to the lower limit. This is important in general, not just here.

Thanks. Yes, I didn’t write the subtitles. I’m not THAT dedicated😂.

@panda0734 thank you :)

@@drishtiverma2166 thank you :)

@@SaurishMisra my pleasure :)

Glad it was helpful!

@@Spidey_Gami share, like and subscribe for more✌️😌

You're welcome 😊

@@panda0734 ✌️😊

Thank you :))

@@NoshabaWaqar thank you! 🙏

You’re welcome! 😊

@@TEAM-BRAHMA this is a really good question actually, thanks for asking! Let me clarify: In this question the lamp was operating at a different voltage because of the resistors. Otherwise the lamp or any other device will always operate at the voltage of the battery (if there are no other resistors or components).

frfr and that too in cbse

It's too heartwrenching 😭😭

Indian syllabus is more advanced, I agree. But this question is taken from past paper question bank of AS physics.

We are following Edexcel A-Levels 1st year syllabus (equivalent to 11th grade). This curriculum is mostly taught in the UK.

@BajarangiGaming7 this question is taken from past papers of Edexcel A-levels physics exams.

@@norella6008 yes! And because the force Z is acting along the line through the pivot point (along the axis), it will not produce any torque. We have to calculate the torque because of X and Y only.

There are many websites. I have a paid subscription for savemyexams.com. But there are also free topic questions available... just google it.