Free Printable plus two

1.

In the diagram below, P is a point near a negatively charged sphere. Which direction best represents the direction of the electric field at point P?

a)

Right

b)

Left

c)

Up

d)

Down

2.

Which quantity and unit are correctly paired?

a)

electric field strength and N/C

b)

electricity and Coulombs

c)

electrostatic force and electrons

d)

electric field strength and E

3.

A point charge Q is far from all other charges. At a distance of 2 m from Q, the electric field is 20 N/C. What is the force a charge of 5 Coulombs feels?

a)

4 N

b)

100 N

c)

40 N

d)

10 N

4.

Which of the following statements is false about electric field lines

a)

electric field lines cannot cross

b)

electric field lines point away from positive charge

c)

electric field lines are always straight lines

d)

electric field lines show how a proton would move in an electric field

5.

At which point is the electric field the strongest

a)

A

b)

B

c)

C

d)

D

6.

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

7.

Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.

a)

+,+

b)

+,-

c)

-,+

d)

-,-

8.

Consider the electric field lines drawn at the right for a configuration of two charges. Several locations are labeled on the diagram. Which of these shows the ranking in order of weakest to strongest correctly

a)

A, E, C

b)

D, E, C

c)

D, B, A

d)

A, D, B

9.

An electrostatic force of 2 X 10². newtons is exerted on a charge of 4 coulomb at point P in an electric field. The magnitude of the electric field intensity at P is

a)

8 X 10² N/C

b)

5 N/C

c)

2 X 10^-2 N/C

d)

50 N/C

10.

It is observed that Balloon A is charged negatively. Balloon B exerts a repulsive effect upon balloon A. Would the electric field vector created by balloon B be directed towards B or away from B and why?

a)

towards because electric field lines point away from negative charges

b)

towards because electric field lines point away from positive charges

c)

away because electric field lines point away from negative charges

d)

away because electric field lines point toward positive charges

11.

Q_Aand Q_Bare two charges creating an electric field. Based on the electric field lines, we can conclude

a)

Q_Aand Q_Bare both positive

b)

Q_Aand Q_Bare both negative

c)

Q_Ais positive and Q_Bis negative

d)

Q_Ais negative and Q_Bis positive

12.

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

13.

The electrical force between charges is strongest when the charges are

a)

close together

b)

far apart

c)

the electric force is constant everywhere.

d)

there is no pattern

14.

What is the magnitude of the electric field intensity at a point where a proton experiences an electrostatic force of magnitude 2.30 x 10^-25 newton?

a)

1.44 x 10^-6 N/C

b)

3.68 x 10⁶ N/C

c)

1.44 x 10⁴⁴ N/C

d)

3.68 x 10^-44 N/C

15.

What is the S. I. unit of electric flux?

a)

$Nm^2C^{-1}$

b)

$NmC^{-1}$

c)

$Nm^{-2}C^2$

d)

$NmC^{-2}$

16.

Three charges, each of value Q, are placed at the vertex of an equilateral triangle. A fourth charge q is placed at the centre of the triangle. If the charges remains stationery then, q = ______

a)

$Q/√2$

b)

$-Q/√3$

c)

$-Q/√2$

d)

$Q/√3$

17.

What does it mean when the electric field lines are close together?

a)

the field is positive

b)

the field is negative

c)

The field is strong

d)

the field is weak

18.

When a balloon is rubbed on clothes it acquires a charge by ___________

a)

Induction

b)

reduction

c)

friction

d)

concuction

19.

What do you call the process of charging a conductor by bringing it near another charged object?

a)

induction

b)

polarization

c)

neutralization

d)

conduction

20.

What is the name of this device that is used to detect charges?

a)

beaker

b)

electroscope

c)

van de graff generator

d)

chargometer

21.

What must be the charge of the two particles and how do you know?

a)

They are both positive, the electric field lines repel each other and are heading out of the charges

b)

They are both positive, field lines repel each other and are heading toward the charges

c)

They are both negative, field lines repel each other and are heading out of the charges

d)

They are both negative, field lines repel each other and are heading toward the charges

22.

Equal charges ‘q’ are placed at the vertices A and B of an equilateral triangle ABC of side ‘a’. The magnitude of electric field at the point C is

a)

$Kq/a^2$

b)

$√2Kq/a^2$

c)

$√3Kq/a^2$

d)

$3Kq/a^2$

23.

The dimensional formula of electric charge is

a)

$M^0L^0T^1A^1$

b)

$M^0L^0T^{-1}A^1$

c)

$M^0L^0T^1A^{-1}$

d)

$M^0L^0T^{-1}A^{-1}$

24.

Four charges are arranged at the corners of a square ABCD, as shown in the adjoining figure. The force on the charge kept at the centre O is

a)

Zero

b)

along the diagonal AC

c)

along the diagonal BD

d)

perpendicular to side AB

25.

A region of influence surrounding an object is best defined as:

a)

An electric field

b)

A field

c)

A force

d)

A gravitational field

26.

The electric field surrounding a positively charged object is

a)

Away from the charge

b)

Toward the charge

27.

If I triple the value of charge of a test charge the electric field will

a)

Increase by 3

b)

Increase by 9

c)

Not change

d)

Decrease by 9

28.

Out of the following is not a property of field lines

a)

Field lines are continuous curve without any break

b)

Two field lines cannot cross each other .

c)

Field lines contract longitudinally.

d)

Field lines form closed loops

29.

Two small charged spheres A and B have charges 10 $\mu C$ and 40 $\mu C$ respectively, and held at separation of 90 cm from each other . At what distance from A , electric field intensity would be zero .

a)

50 cm

b)

35 cm

c)

30 cm

d)

22 cm

30.

Which of the following is not a property of electric dipole

a)

Electric dipole is two equal and opposite charges separated by certain distance .

b)

Net charge on it is zero .

c)

Direction of electric dipole moment is from +q charge to -q charge.

d)

It is a vector quantity .

31.

Write the relation between electric field intensity due to a dipole at axial line and equatorial line when the length of dipole is small as compare to the distance of observation point from the center of dipole .

a)

$E_{axial\ }\ =\ \ E_{equatorial}$

b)

$2\ E_{axial\ \ }\ =\ \ E_{equatorial}$

c)

$E_{axial\ \ }=\ \ 2\ E_{equatorial}$

d)

$E_{axial\ \ \ }=\ \ \ \ \frac{E_{equatorial}}{4}$

32.

Relation of electric field intensity E due to a single point positive charge with distance r of observation point from charge is :

a)

$E\ \propto\ r$

b)

$E\ \ \ \propto\ \ \frac{I}{r^2}$

c)

$E\ \ \ \propto\ \ \ \ \frac{1}{r^3}$

d)

$E\ \ \ \propto\ \ \ \frac{1}{r}$

e)

$E\ \ \ \propto\ \ \ r^2$

33.

Electric field intensity E due to a dipole vary with distance r of observation point from the center of dipole as : ( when length of dipole is small as compare to the distance of observation point from center of dipole )

a)

$E_{dipole\ \ \ }\propto\ \ \ r^2$

b)

$E_{dipole\ \ \ \ }\propto\ \ \ \ \ \frac{1}{r^2}$

c)

$E_{dipole\ \ \ \ }\propto\ \ \frac{1}{r^4}$

d)

$E_{dipole\ \ \ \ \ \ \ }\propto\ \ \ \ \ \ \ \frac{1}{r^3}$

e)

$E_{dipole\ \ \ \ \ }\propto\ \ \ \ \frac{1}{r}$

34.

Relation between Electric field intensity $\overrightarrow{E}$ , Coulomb force $\overrightarrow{F}$ and test charge $\delta q$ is :

a)

$\overrightarrow{E}\ \ \ \ \ =\ \ \ \delta q\ \ \overrightarrow{F}$

b)

$\overrightarrow{E}\ \ \ \ \ \ =\ \ \ \overrightarrow{\frac{F}{\delta q}}$

c)

$\overrightarrow{E}\ \ \ \ =\ \ \ \ \ \frac{\delta q}{\overrightarrow{F}}$

d)

$\overrightarrow{E}\ \ \ \ =\ \ \ \overrightarrow{\frac{F}{\delta q^2}}$

e)

$\overrightarrow{E}\ \ \ \ =\ \ \delta q^2\ \ \overrightarrow{F\ }$

35.

Which graph best represents the relationship between the strength of an electric field and distance from a point charge?

a)

b)

c)

d)

36.

What does the Law of Conservation of Charge state?

a)

like charges repel and opposites attract

b)

positive charge fields point away from a charge; negative points toward

c)

charges cannot be created nor destroyed, only transferred

37.

How do electric field lines represent the magnitude of an electric field?

a)

Length of the line

b)

With arrows

c)

Density of lines

d)

Width of lines

plus two

Total questions: 37

Worksheet time: 22mins

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