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7th Homework Quiz 1

Total questions: 28

Worksheet time: 7hrs 0mins

Name
Class
Date
1.

In a damped oscillation, a force acts to change the amplitude of oscillation.


Which of the following statements about the direction of this force is correct?

a)

The force is in the opposite direction to the displacement.

b)

The force is in the opposite direction to the velocity.

c)

The force is in the same direction as the displacement.

d)

The force is in the same direction as the velocity.

2.
Which of the following is not an example of SHM?
a)
A simple pendulum
b)
A vibrating spring
c)
A marble on a concave surface
d)
Bouncing on a trampoline
3.

The diagram shows a coin on a horizontal surface which is rotating at a constant angular velocity ω\omega  

Which arrow correctly shows the direction of the frictional force on the coin?

a)

A

b)

B

c)

C

d)

D

4.
For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion?
a)
amplitude
b)
period
c)
frequency
d)
revolution
5.

Which graph shows how the electric field strength E due to a negative point charge varies with distance r from the charge?

a)

A

b)

B

c)

C

d)

D

6.

Two charges +Q and –Q are located as shown on the diagram. × is the point halfway between the two charges.

A small positive charge moves from +Q to –Q. Which statement about the resultant force on this charge, as it passes through ×, is correct?

a)

The magnitude of the resultant force is a maximum.

b)

The magnitude of the resultant force is a minimum.

c)

The resultant force changes direction.

d)

The resultant force is zero.

7.
Which position shows the spring with maximum elastic potential energy?
a)
A
b)
B
c)
C
d)
D
8.
At which point is the electric field the weakest?
a)
A because it is the furthest away
b)
A because the field lines are further apart
c)
C because the field lines are further apart
d)
C  because it is the furthest away
9.
Which of the following is a true statement about the electric field between the two plates?
a)
The field is attractive between the plates and uniform in strength
b)
The field is repulsive between the plates and uniform in strength
c)
The field is attractive between the plates and strongest near the positive
d)
The field is repulsive between the plates and strongest near the positive
10.

The unit for capacitance is the farad. The farad can also be written as

a)

A s V-1

b)

A s-1 V-1

c)

A-1 s-1 V

d)

A-1 s V

11.
The definition of gravitational field strength is:
a)
The region of space surrounding a body where other bodies will feel an attractive force due to it.
b)
The region of space surrounding a body where other bodies will feel an repulsive force due to it.
c)
The region of space surrounding a charge where other charges will feel an attractive force due to it.
d)
The region of space surrounding a charge where other charges will feel an repulsive force due to it.
12.
In this equation...
a)
G is the gravitational field strength
b)
r is the distance between the 2 masses
c)
F is the repulsive gravitational force
d)
m is the momentum of the mass
13.

Change Q on a capacitor varies with voltage V . The area of triangle OAB represents

a)

Capacitance

b)

Capacitive reactance

c)

Magnetic field between the plates

d)

Energy stored in the capacitor

14.
Which represents the acceleration of the ball?
a)
A
b)
B
c)
C
d)
D
15.
The gravitational field strength of Earth is...
a)
uniform far away from the surface and radial close to the surface
b)
uniform close to the surface and radial far away from the surface
16.

What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?

a)

5 m/s2

b)

17.63 m/s2

c)

10 m/s2

d)

8.81 m/s2

17.

A ball on a string is spun around in a circle. Which of the following quantities is not constant?

a)

mass

b)

force

c)

velocity

d)

acceleration

18.
Gravitational potential at a point is....
a)
the work done in bringing a unit mass from infinity to the point
b)
the work done in bringing a unit mass from the point to infinity
c)
the work done in bringing a unit charge from infinity to the point
d)
the work done in bringing a unit mass from twice the radius of the mass to the point
19.

In a charged capacitor, the energy resides in

a)

The positive charges

b)

Both the positive and negative charges

c)

The field between the plates

d)

Around the edge of the capacitor plates

20.

Which of the following depict the speed of the bowling ball?

a)

A

b)

B

c)

C

d)

D

21.

During charging a capacitor variation of potential V of the capacitor with time t is shown as

a)
b)
c)
d)
22.
Two objects are attracted to each other with 36 N of gravitational force.
What would the force between them be if the distance between them were doubled?
a)
9
b)
18
c)
72
d)
144
23.

The electric field strength between a pair of parallel plates is E. The separation of the plates is doubled and the potential difference between the plates is increased by a factor of four.

What is the new electric field strength?

a)

E

b)

2E

c)

4E

d)

8E

24.

An electron of charge e is introduced between two metal plates a distance d apart.

A potential difference V is applied to the plates as shown in the diagram.

Which expression gives the electric force F on the electron?

a)

eVd\frac{eV}{d}

b)

eVdeVd

c)

Ved\frac{V}{ed}

d)

dVe\frac{dV}{e}

25.

Electric field is dimensionally equivalent to which of the following?

a)

Nm/C

b)

N/C

c)

Nm2/C

d)

N/C2

26.

The beam of electrons that hits the screen of an oscilloscope is moved up and down by:

a)

gravity

b)

varying the electron's charge

c)

electrical charges on deflecting plates

d)

electrical repulsion between electrons

27.

The 0.5 kg ball travelling at 3ms-1 hits the stationary 0.8 kg ball. Afterwards the 0.5 kg ball is travelling at 0.5 ms-1. Calculate the 0.8 kg balls velocity.

a)

2 ms-1

b)

1.85 ms-1

c)

0.25 ms-1

d)

0.1 ms-1

28.

What is the unit of impulse?

a)

N/s

b)

Kg.m/s

c)

N.s

d)

Kg.m/s and N.s

e)

None of the above

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