Class 9 Physics Chapter 8 Exercise Constructive Questions PDF New Syllabus

Download Class 9 Physics Chapter 8 Exercise Constructive Questions PDF both English and Urdu medium for quick revision and exam preparation. This PDF is helpful for 9th class students who want to prepare important exercise comprehensive questions according to the new syllabus. Students can use it to revise chapter-wise questions, improve their concepts, and prepare better for school tests and board exams.

Chapter 8 Constructive Questions: Magnetism

The constructive questions at the end of Chapter 8 describe a situation and ask you to account for it. They are the closest thing in the textbook to the nine-mark questions in the annual paper. In this chapter they deal with:

• Why a magnet attracts an unmagnetised nail, explained through induced magnetism.
• How the domain model explains magnetising, demagnetising, heating and hammering.
• Why soft iron is used both for shielding and for electromagnet cores.
• How magnetism is used in circuit breakers and maglev trains.

What a Full-Mark Answer Looks Like Here

These answers are marked point by point, so an answer that circles the idea without stating it plainly scores badly. For Magnetism in particular:

• Explain magnetism in terms of the alignment of domains, not vague “magnetic power”.
• Say what happens to the domains, then say what is observed.
• Name the law or principle first, then apply it to the objects actually named in the question.
• Draw and label a diagram wherever one is possible, since it often carries a mark by itself.

Why This Set Repays the Effort

Most students drill the short questions and leave the constructive ones until last, which is the wrong way round. Eighteen of the sixty marks in the annual paper come from long questions built on exactly this material, and a reasoning question cannot be answered from memory alone. Attempt them in writing with the book closed, then compare.

Frequently Asked Questions

Why does a magnet attract an unmagnetised iron nail?

Because the magnet induces magnetism in the nail: the domains in the nail line up so that the end nearer the magnet gains the opposite pole, and opposite poles attract.

How many marks do the long questions carry?

Eighteen of the sixty. Three are offered and you attempt any two, at nine marks each, split into a four-mark and a five-mark part.

Related Class 9 Physics Resources

For the two-mark recall answers from the same chapter see the Chapter 8 exercise short questions, and check your understanding with the Chapter 8 online test. Continue with Chapter 7 and Chapter 9, or download the 25 Class 9 Physics guess papers for timed practice. Browse Class 9 Physics notes for the rest.