## Tuesday, 20 September 2022

### ELECTRIC DIPOLE AND ELECTRIC DIPOLE MOMENT PART 1

Q1 A system of two equal and opposite charges (+q and -q) separated by a small distance 'd', has a dipole moment 'p' equal to

• \frac{q}{d}
• \frac{2q}{d}
• 2qd
• None of these

• 2qd

Q2 The direction of  electric dipole moment is

• from +q and -q
• from -q and +q
• perpendicular to the line joining -q to +q
• away from +q

• from -q and +q
•

Q3 .The unit of Electric dipole moment is

• Cm
• Cm^{-1}
• Cm^{-2}
• NCm^{-2}

• Cm

Q4 When an electric dipole is placed in a uniform external electric field parallel to the field, it will experience

• a torque but no force
• a force but no torque
• a torque as well as force
• neither a force nor a torque

• a torque but no force

Q5 The direction of electric field due to an electric dipole at a point on its axial line is

• Same as that of electric dipole moment
• Zero
• different to  that of electric dipole moment
• None of the above

• Same as that of electric dipole moment

Q6 The direction of electric field due to an electric dipole at a point on its equatorial line is

• Same as that of electric dipole moment
• Zero
• opposite to  that of electric dipole moment
• None of the above

• opposite to  that of electric dipole moment

Q7 work done in moving a charge along equatorial line is ?

• Maximum
• minimum
• Zero
• None of these

• Zero
• Reason: The Electric Potential is every where zero on the equtorial line of a dipole.

Q8 Dipole Moment Vector Quantity.

• true
• false

• true

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