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Physics

Total questions: 20

Worksheet time: 23mins

Name
Class
Date
1.
A star appears to be white according to its spectral composition, but it appears blue when observed through a telescope. What is the best explanation for this phenomenon?
a)
The object is moving toward Earth.
b)
The object is moving away from Earth.
c)
The object is moving parallel to Earth.
d)
all of the above
2.

Which electromagnetic wave travels the fastest? (The answer can be more than one choice)

a)

microwave

b)

ultraviolet

c)

x­ray

d)

infrared

3.
What best describes what happens when light hits a concave mirror?
a)
After incident rays hit the mirror, the reflected rays converge
b)
After incident rays hit the mirror, the reflected rays follow the law of reflection
c)
The angle of incidence is equal to the angle of reflection
d)
After incident rays hit the mirror, the reflected rays diverge
4.
What best describes what happens when light hits a convex mirror?
a)
After incident rays hit the mirror, the reflected rays converge
b)
After incident rays hit the mirror, the reflected rays follow the law of reflection
c)
The angle of incidence is equal to the angle of reflection
d)
After incident rays hit the mirror, the reflected rays diverge
5.

She holds the book stationary against the wall as shown. Friction on the book by the wall acts

a)

Upward

b)

Downward

c)

No friction

d)

Can't say

6.
Two balls of equal mass at the bottom of an inclined are rolled upward without slipping at the same initial velocity. One ball is solid and the other is a thin-walled hollow ball. Which rolls higher up the incline before coming to a stop?
a)
The hollow ball
b)
The solid ball
c)
Both will roll to the same height.
d)
Depends on the relative diameters of the balls.
7.

Some springs are combined in series and parallel arrangement as shown in the figure. A mass m is suspended from them. Determine the ratio of their frequencies will be.

a)

1 : 1

b)

2 : 1

c)

√3 : 2

d)

4 : 1

8.

The vessels are the same, the diameters of the balls are equal, the volume of water in each vessel is the same. Ignore weight and volume of the ropes. Which cup will outweigh?

a)

Left

b)

Balanced

c)

Right

9.
A cannon ball shot from a cannon with a long barrel will emerge with greater speed because
a)
cannon ball receives a greater force
b)
shorter time for the force to act
c)
greater work done
d)
larger mass
e)
longer barrel
10.

Nellie Newton hangs by one hand motionless from a clothesline. Which side of the line has the smaller tension?

a)

Left-side

b)

Right-side

c)

50/50 chance of either side breaking.

11.
The stars appear to "move" across the sky at night because
a)
the Earth is orbitting the Sun
b)
the Earth is rotating on it axis
c)
the stars are orbitting the Earth
d)
the stars are revolving around the centre of galaxy
12.
What is the evidence that the Earth rotates on its axis is the motion of
a)
tectonic plates
b)
Polaris
c)
a wind vane
d)
a Foucault pendulum
13.
Earth is frequently striked by asteroids but the evidence such as impact craters is hard to find because
a)
asteroids are made of frozen water and gases. They will be vaporized on impact or when entering the Earth's atmosphere.
b)
Asteroids do not have enough speed to create impact craters.
c)
Asteroids are not large enough to create impact craters.
d)
Erosion, deposition and weathering on Earth have buried or destroyed the impact craters.
14.
What is the correct sequence in terms from the smallest to largest size?
a)
Our solar system, universe, Milky Way
b)
Our solar system, Milky Way, Universe
c)
Milky Way, Our solar system, Universe
d)
Milky Way, Universe, Our solar system
15.
Which gas is not the cause for the green house effect?
a)
Carbon dioxide
b)
Methane
c)
Ozone
d)
Nitrogen
16.
Which is the correct sequnce in terms from the smallest to the largest diameter?
a)
The Moon, Pluto, Mars, Mercury
b)
Pluto, the Moon, Mercury, Mars
c)
Mercury, Mars, the Moon, Pluto
d)
Mars, Mercury, Pluto, the Moon
17.
Which instrument is used to measure the optical activity
a)
Spectrophotometer
b)
Polarimeter
c)
Calorimeter
d)
Infantometer
18.

The picture shows which type of

reflection?

a)

Specular

b)

X-Ray

c)

Diffuse

d)

Normal

19.

You are putting more weight on earth when you are in which position?

a)

Siting

b)

Standing

c)

Lying

d)

None of these

20.

What is the most important factor to have a stable racing car?

a)

Decrease its mass

b)

Increase its speed

c)

Lower its center of gravity

d)

Decrease its width

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