Comments on: 9th Physics, Chapter 9 Online Test, New Syllabus

By: Ibrahim

Ibrahim — Fri, 28 Feb 2025 17:33:09 +0000

sorry sir but i want you to inform that there are not many mcqs to solve u should add some more mcqs like some from the chapter (conceptual) so we can also handle conceptual thing . Thank You

By: ABDULLAH

ABDULLAH — Mon, 25 Mar 2024 18:02:51 +0000

The thermal conductivity of a wall is directly proportional to its thickness12. If the thickness of the wall is doubled, the thermal conductivity also becomes double12. This is because a larger cross-sectional area of the solid has a larger number of molecules and free electrons on each layer parallel to its cross-sectional area, resulting in a greater rate of flow of heat through the solid1. in
the MCQ that What happens to the thermal conductivity of a wall if its thickness is doubled?
Becomes double
remains the same wrong
Becomes half correct
becomes one forth

By: Organizer

Organizer — Tue, 06 Jun 2023 14:19:15 +0000

In reply to Maryam. ok, we’ll check it.

By: aqa

aqa — Mon, 01 May 2023 07:50:15 +0000

In reply to Bushra. tuka lag gya ho ga tumhara

By: FaminiB

FaminiB — Sat, 15 Apr 2023 06:51:19 +0000

In reply to Author. As thermal conductivity is inversely proportional to length (thickness),so if thickness is doubled ,thermal conductivity will be halfed.This is according to formula of thermal conductivity.

By: Bushra

Bushra — Fri, 10 Mar 2023 20:15:14 +0000

I got 10 out of 10 marks

By: Maryam

Maryam — Tue, 21 Feb 2023 23:34:09 +0000

Sir the MCQ
Water is a
Good conductor
Poor conductor ❎
Super conductor ✅
Insulator
Sir it’s answer is wrong because heat travels in water by conduction and convection and it is written on pg 198 in for your information

By: Author

Author — Thu, 31 Mar 2022 07:02:54 +0000

In reply to Abdullah Hussain. ok, we'll check it.

By: Abdullah Hussain

Abdullah Hussain — Wed, 30 Mar 2022 13:09:34 +0000

Sir the Mcq

What happens to the thermal conductivity of a wall if its thickness is doubled?
Becomes double
remains the samewrong
Becomes halfcorrect
becomes one forth
It’s answer in the is wrong beacuse it remains same bacause it depends upon the nature of the object