Electric Charges and Fields Test

Result

Electric Charges and Fields Test - 6

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Weekly Quiz Competition

Question 1
4 / -1

Electric field lines provide information about

A
field strength

B
direction

C
nature of charge

D
all of these
Question 2
4 / -1

Which of the following figure represents the electric field lines due to a single positive charge?

A

B

C

D

Solution

The field lines of a single positive charge are radially outward.
Question 3
4 / -1

Which of the following figure represents the electric field lines due to a single negative charge?

A

B

C

D

Solution

The field lines of single negative charge are radially inward.
Question 4
4 / -1

Which of the following figures correctly shows the top view sketch of the electric field lines for a uniformly charged hollow cylinder as shown in figure?

A

B

C

D

Solution

For a uniformly charged hollow cylinder, the electric field lines are as shown in figure (b).
Question 5
4 / -1

Figure shows the electric field lines around three point charges A, B and C. Which of the following charges are positive?

A
Only A

B
Only C

C
Both A and C

D
Both B and C

Solution

In the given figure, the electric lines of force emanate from A and C. Therefore, charges A and C must be positive.
Question 6
4 / -1

Figure shows the electric field lines around three point charges A, B and C. which charge has the largest magnitude?

A
A

B
B

C
C

D
B and C have equal magnitude

Solution

From the given figure it is clear that, maximum number of electric lines of force are associated with charge C, so it must have the largest magnitude.
Question 7
4 / -1

Figure shows the electric field lines around three point charges A, B and C. which or regions of the figure could the electric field be zero?

A
Near A

B
Near B

C
Near C

D
Nowhere

Solution

From the figure, it is clear that, there cannot be a neutral point between a positive and a negative charge. Neutral point can be only there between two like charges i.e„ A and C. As magnitude of charge A is smaller than the magnitude of charge C, therefore, neutral point would lie closer to the charge A.
Question 8
4 / -1

A non-uniform electric field is represented by the diagram. At which of the following points the electric field is greatest in magnitude?

A
A

B
B

C
C

D
D

Solution

Electric field strength is maximum where the electric field lines are closer.
Question 9
4 / -1

Which of the following curves shown below cannot possibly represent electrostatic field lines?

A

B

C

D

Solution

Electrostatic field lines start or end only at 90⁰ to the surface of the conductor. So curve (b) cannot represent electrostatic field lines.
Question 10
4 / -1

Which of the following statements is not true about electric field lines?

A
Electric field lines start from positive charge and end at negative charge.

B
Two electric field lines can never cross each other.

C
Electrostatic field lines do not form any closed loops.

D
Electric field lines cannot be taken as continuous curve.

Solution

In a charge-free region, electric field lines can be taken to be continuous curves without any breaks.