## Tuesday, 20 September 2022

### MCQ ON ELECTRIC FIELD, ELECTRIC DIPOLE SET 2

Q1 Electric field at the center of charged circular loop is

• ∞
• Always  0
• None of these

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
• At45^{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