MCQ ON ELECTRIC FIELD, ELECTRIC DIPOLE SET 2

 

Q1 Electric field at the center of charged circular loop is

• ∞ 
• 0 
• Always  0  
• None of these

• 0 

Q2 Direction of electric field on the axis of a charged ring is along

• ⊥ to the axis 
• along the axis 
• `45^{0}` with axis 
•  the centre

along the axis 

 

Q3 .The net force acting on a dipole in a uniform electric field is

• In the direction of electric field
• Opposite to the direction of electric field
• Always zero
• In a direction ⊥ to electric field

• Always zero

Q4 The potential energy of a dipole is  zero if angle made by the dipole moment with electric field is

• `45^{0}` 
• `90^{0}` 
• `180^{0}` 
• `0^{0}` 

• `90^{0}` 

Q5 The dipole is said to be in stable equilibrium when the dipole moment is

• In the direction of the field
• Opposite to the direction of the field
• ⊥ to the direction of the field
• At `45^{0}` with the direction of the field

• In the direction of the field

Q6 The dipole is said to be in unstable equilibrium when the dipole moment is

• In the direction of the field
• Opposite to the direction of the field
• ⊥ to the direction of the field
• At`45^{0}` with the direction of the field

• Opposite to the direction of the field

 

Q7 If a dipole is placed in a non uniform electric field then it will experience ?

Torque as well as force

Only torque but no force

Only force but no torque

Zero force and zero torque

• Torque as well as force

Q8 Torque has the units of

• Nm
• Cm
•  `Nm^{2}`
• `Cm^{-1}`

• Nm

Q9 A system of two equal and opposite charges separated by a certain distance is called

• Electric field 
• Electric dipole
• Electric dipole moment
• Electric flux

• Electric dipole

Q10 Dipole length is a ...

• Scalar quantity 
• Vector quantity

Vector quantity