• (a) Bqv
• (b) B/qv
• (c) Zero
• (d) q/Bv

• (c) Zero

## Q2 The dimensions of magnetic field intensity are

• a) M^{1}L^{1}T^{-1}
• b) M^{1}T^{-2}A^{-1}
• c). M^{1}T^{-2}A^{-2}
• d). M^{1}T^{-1}A^{-1}

• b) M^{1}T^{-2}A^{-1}

## Q3  Magnetic dipole moment is a vector quantity directed from

• a) east to west
• b) south to north
• c) west to east
• d) north to south

• b) south to north

• a) 0
• b) -1
• c) +1
• d) ∞

• b) -1

• a) M, m/2
• b) M/2, m
• c) M, m
• d) M/2, m/2

• b) M/2, m

• a) F
• b) F/4
• c) 2F
• d) F/2

• a) F

• a) True
• b) False

• b) False

## Q8 If horizontal and vertical components of earth's magnetic field are equal, then angle of dip is will be

• (a) 30^{0}
• (b) 60^{0}
• (c) 90^{0}
• (d) 45^{0}

• (d) 45^{0}

• a) True
• d) False

• (a) True

## Q10 Dimensional formula for magnetic dipole moment is:

• a) L^{2}A^{-1}
• b) L^{2}A^{}
• c) L^{2}A^{-2}
• d) L^{1}A^{-1}

• b) L^{2}A^{}

### ELECTRIC DIPOLE NOTES: ELECTRIC DIPOLE , DIPOLE LENGTH, ELECTRIC FIELD DUE TO ELECTRIC DIPOLE

Electric Dipole: It is a  system of equal and opposite charges separated by some  fixed distance. DIPOLE LENGTH : the distance AB = 2a is ...