Physics
Grade-8
Easy
Question
Which of the given physical quantities is/are a vector? Choose the best suitable option.
- Electric force
- Electric field strength
- Electric charge
- Electric Force and Electric field strength
Hint:
A vector quantity is defined as the physical quantity that has both directions as well as magnitude.
The correct answer is: Electric Force and Electric field strength
A vector quantity is defined as the physical quantity that has both directions as well as magnitude.
The electric is a quantity that is measured in vectors. The ratio of force per unit test charge is known as the electric field. Electric field is a vector quantity since force is a vector quantity.
The electric force is a vector,
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The concept of electric field lines was discovered by:
- Newton
- Coulomb
- Faraday
- Ampere
The concept of electric field lines was discovered by:
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- Newton
- Coulomb
- Faraday
- Ampere
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The figure shows some of the electric field lines corresponding to an electric field. The figure suggests that the electric field is:

The figure shows some of the electric field lines corresponding to an electric field. The figure suggests that the electric field is:

PhysicsGrade-8
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Select the correct statements about electric field lines.
I. Two electric field lines can cross each other.
II. They start from a positive charge and may end at a negative charge.
III. Electric field lines form closed loops.
- I, II, and III
- I and II
- II and III
- I and III
Select the correct statements about electric field lines.
I. Two electric field lines can cross each other.
II. They start from a positive charge and may end at a negative charge.
III. Electric field lines form closed loops.
PhysicsGrade-8
- I, II, and III
- I and II
- II and III
- I and III
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The electric field lines due to a single negative charge.
a.
, b. 
c.
d. 
are represented by which one of the following figures?
- a
- b
- c
- d
The electric field lines due to a single negative charge.
a.
, b. 
c.
d. 
are represented by which one of the following figures?
PhysicsGrade-8
- a
- b
- c
- d
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Which of the following information do the electric field lines provide?
- Strength of the field
- Nature of the charge
- The direction of the field
- All the above
Which of the following information do the electric field lines provide?
PhysicsGrade-8
- Strength of the field
- Nature of the charge
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The electric field strength at a point depends upon:
- Electric force
- Charge
- Distance from the charge
- All the above
The electric field strength at a point depends upon:
PhysicsGrade-8
- Electric force
- Charge
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Physics
Which of these is false about the electric field lines?
- The electric field lines originate from a positive charge and end in a negative charge.
- Two electric field lines never intersect each other.
- Electric field lines form closed loops.
- For a single charge, the electric field lines end at infinity.
Which of these is false about the electric field lines?
PhysicsGrade-8
- The electric field lines originate from a positive charge and end in a negative charge.
- Two electric field lines never intersect each other.
- Electric field lines form closed loops.
- For a single charge, the electric field lines end at infinity.
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A test charge may be of any magnitude.
- True
- False
A test charge may be of any magnitude.
PhysicsGrade-8
- True
- False
Physics
Which of the following information is provided by the electric field lines?
- The strength of the electric field in a region
- The direction of electric force at a point
- Both a and b
- Neither a nor b
Which of the following information is provided by the electric field lines?
PhysicsGrade-8
- The strength of the electric field in a region
- The direction of electric force at a point
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- Neither a nor b
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For a negative charge, the field line move _____ the charge.
- Away
- Around
- Towards
- Very close to
For a negative charge, the field line move _____ the charge.
PhysicsGrade-8
- Away
- Around
- Towards
- Very close to
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The direction of force and the direction of electric field strength is always opposite.
- True
- False
The direction of force and the direction of electric field strength is always opposite.
PhysicsGrade-8
- True
- False
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The field line moves towards the positive charge.
- True
- False
The field line moves towards the positive charge.
PhysicsGrade-8
- True
- False
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A test charge is always taken ________ and ____________.
- Small, positive
- Large, positive
- Small, negative
- Large, negative
A test charge is always taken ________ and ____________.
PhysicsGrade-8
- Small, positive
- Large, positive
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The field lines do not _____ with each other.
The field lines do not _____ with each other.
PhysicsGrade-8
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The ________ at a point on the field lines gives the direction of the electric field.
- Tangent
- Normal
- Zero
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The ________ at a point on the field lines gives the direction of the electric field.
PhysicsGrade-8
- Tangent
- Normal
- Zero
- Reflex