Physics Textbook 9th Class. We covered all the Physics Textbook 9th Class MCQs in this post for free so that you can practice well for the exam.
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Physics Textbook 9th Class Objective for Students
The electromagnetic waves are
a. Longitudinal waves
b. Mechanical waves
c. Transverse waves
d. Progressive waves
Option c – Transverse waves
In refraction mode, the frequency of electromagnetic wave
a. changes with time
b. doesn’t change
c. decreases
d. increases
Option b – doesn’t change
A wire of a uniform area of cross-section is stretched such that its length is doubled. Its resistance
a. Doesn’t change
b. Becomes 8 times
c. Becomes half
d. Becomes 4 times
Option d – Becomes 4 times
When the temperature of a semiconductor is raised, its resistance
a. Decreases
b. Increases
c. Doesn’t change
d. None of these
Option a – Decreases
Ohm’s law holds good for
a. All conductors
b. All metal conductors
c. All semiconductors
d. Ionic solutions
Option b – All metal conductors
In the case of some substances, the resistance becomes zero at low temperatures, these substances are called
a. Superconductors
b. Semiconductors
c. Dielectrics
d. Full conductors
Option a – Superconductors
We covered all the mcqs above in this post for free so that you can practice well for the exam.
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Also, check out:
- Concise Physics Class 9 Chapter 3 Solutions
- Working Model of Physics for Class 9
- The Mauryan Empire Class 9 ICSE
