Grade 9 Topics

Quiz
•
Physics
•
9th Grade
•
Hard
S Frans
Used 6+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when a solid is heated and expands?
The molecules do not change size and the spaces between the molecules become larger.
The molecules expand and the spaces between the molecules become larger.
The molecules expand and the spaces between the molecules become smaller.
The molecules expand and the spaces between the molecules do not change size.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The diagram shows two divergent rays of light from an object O being reflected from a plane mirror.
At which position is the image formed?
A
B
C
D
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement is correct?
Total internal reflection only occurs when light travels from air into glass.
The larger the refractive index of glass, the larger is the critical angle.
When total internal reflection occurs, the angle of incidence is equal to the angle of reflection.
When total internal reflection occurs, the angle of incidence is less than the critical angle.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A young person with healthy ears can hear a range of frequencies.
What is the approximate range of frequencies?
2 Hz to 2000 Hz only
2 Hz to 20 000 Hz only
20 Hz to 2000 Hz only
20 Hz to 20 000 Hz only
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An electric current in a wire is into the page.
Which diagram shows the shape and direction of the magnetic field around the wire?
A
B
C
D
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A copper wire X has resistance R. Another copper wire Y has twice the length and half the cross- sectional area of X.
What is the resistance of Y?
R/2
R
2R
4R
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An electrical appliance is plugged into a socket in the wall. The plug contains a fuse. What is the main purpose of the fuse?
to earth the appliance
to earth the plug
to protect the user from electric shock
to protect the wiring from overheating
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