PHYSICS Quiz 4
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Foundation Program
PHYSICS
Quiz 4
1 An object was placed 40 mm in front of a convex mirror with a radius of 50 mm. The image produced is located:
a 15.4 mm in front of the mirror
b 15.4 mm behind the mirror
c 66.7mm in front of the mirror
d 66.7mm behind the mirror.
2 A divergent lens has a focal length of magnitude 15 mm . Which of the following properties of the object would lead to a real image being formed?
a The object is virtual with an object distance of 8 mm
b The object is virtual with an object distance of 18 mm
c The object is real with an object distance of 8 mm
d The object is real with an object distance of 18 mm.
3 Total internal reflection will occur when light:
a Travels from a slower medium to a faster medium and the angle of incidence is
less than the critical angle.
b Travels from a slower medium to a faster medium and the critical angle is
exceeded.
c Travels at less than the speed of light and is incident at an angle greater than
the critical angle.
d Travels from a medium with a low index of refraction to a higher one.
4 A solid rigid object with a moment of inertia of 12 kgm2 has an initial angular velocity of
9 rads- 1 clockwise. A torque of 44 Nm was then applied to the object in the opposite direction to the initial angular velocity. After 3 s the object will have an angular speed closest to:
a 1 rads- 1
b 2 rads- 1
c 3 rads- 1
d 4 rads- 1
5 A ray of light in glass with a refractive index of 1.42 approaches a glass-air-glass interface at the angle shown.
air
glass
The angle of deviation (the angle through which the ray changes direction) is closest to:
a 0o
b 60o
c 80o
d 140o
6 The tips of a 360 Hz tuning fork are set resonating. If the amplitude of oscillation is 2 mm, then the maximum velocity of the tip is closest to:
a 4.5 ms- 1
b 2.3 ms- 1
c 10232 ms- 1
d 0 ms- 1
The following two graphs describe the same wave and are used for questions 7 and 8.
position (m)
0.2 0.4 0.6
7 This wave has a frequency (in Hz) of:
a 0.4
2.5
1.0
3.2
8 This wave has a minimum speed (in m s- 1) of:
a 0.4
2.5
1.0
d
9 A real object is placed 70 mm in front of a concave mirror of focal length 100 mm. The image is:
a magnified and real
b magnified and virtual
c diminished and real
d diminished and virtual .
10 Which of the following is true in regards to images produced by a Keplerian telescope: a The image produced by the objective lens is virtual
b The image produced by the eyepiece is much larger than the original object size
c The image produced by the eyepiece is upright in relation to the image produced
by the objective lens
d No image is formed by the objective lens.
2022-11-01