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Electrostatic Force and Electric Field

Total questions: 10

Worksheet time: 30mins

Name
Class
Date
1.

Which one sketch correctly electric field strength on q2

a)
b)
c)
d)
2.

Figure below shows the three point charges are placed in the shape of triangular.

Determine the direction of the resultant electric force exerted on q1.

3.

Which of the sketch are correct about electrostatic force, F and electric field strength, E?

a)
b)
c)
d)
4.

Two point charges, Q1 and Q2 are placed 2.0 cm and 3.0 cm from the point A respectively as shown in figure below.

Find the direction of the electric field intensity at point A.

5.

which one sketch correctly electric forces on q1?

a)
b)
c)
d)
6.

What is the magnitude of the electric field at point P due to the two charges positioned as shown in the diagram below? 8.2 x 1058.2\ x\ 10^5  

a)

8.2 x 105 NC18.2\ x\ 10^5\ NC^{-1}   NC1NC^{-1}  

b)

6.2 x 104 NC16.2\ x\ 10^4\ NC^{-1}

c)

8.2 x 105 NC1-8.2\ x\ 10^5\ NC^{-1}

d)

7.2 x 106 NC17.2\ x\ 10^6\ NC^{-1}

7.

Three point charges are placed at the following points on the x-axis: q3 = 5.0 μC at x=120.0 cmq_3\ =\ -5.0\ \mu C\ at\ x=120.0\ cm  

q1 = +2.0 μC at x=0,q_1\ =\ +2.0\ \mu C\ at\ x=0,  

q2 = 3.0 μC at x =40.0 cm,q_2\ =\ -3.0\ \mu C\ at\ x\ =40.0\ cm,  

Find the amount of force acted on the q3q_3   charge.

a)

0.15 N to the left

b)

1.15 N to the right

c)

0.15 N to the right

d)

1.15 N to the left

8.

A charge of q1 =+qq_1\ =+q  is located 1.5m to the right of point P. Where would you have to place a charge of q2 =+qq_2\ =+q   so the electric field at P would be zero?

a)

1.8 m left of P

b)

2.1 m right of P

c)

1.8 m right of P

d)

2.1 m left of P

9.

Two charges are positioned as shown in the diagram below.

Find the magnitude and direction of the electric field at A.

a)

3.8 x 103 NC1 , left of A3.8\ x\ 10^3\ NC^{-1}\ ,\ left\ of\ A

b)

2.5 x 103 NC1 , left of A2.5\ x\ 10^3\ NC^{-1\ },\ left\ of\ A  

c)

3.8 x 103 NC1, right of A3.8\ x\ 10^3\ NC^{-1},\ right\ of\ A

d)

2.5 x 103 NC1, right of A2.5\ x\ 10^3\ NC^{-1},\ right\ of\ A

10.

 Figure below shows two charges +40μC+40\mu C   and 20μC-20\mu C   seperated by 1.3 m1.3\ m  . Determine the electric field at point D due to the negative charge.

a)

2.67x105 NC12.67x10^5\ NC^{-1}

b)

3.67x105 NC13.67x10^5\ NC^{-1}  

c)

4.67x105 NC14.67x10^5\ NC^{-1}

d)

5.67x105 NC15.67x10^5\ NC^{-1}