## Q1 The factors on which one magnetic field strength produced by current carrying solenoids depends are

• (a) Magnitude of current
• (b) Number of turns
• (c) Nature of core material
• (d) All of the above

• (d) All of the above

## Q2 The magnetic field produced due to a solenoid is same as that produced by a....

• a) Bar magnet
• b) Electromagnet
• c) semi- circular coil containing current
• d) None of these

• a) Bar magnet

## Q3  A magnetic dipole is placed in a uniform magnetic fields, "B". At what angle magnetic dipole to be placed  in magnetic field so that  the potential energy is minimum

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

• d) 0^{0}

## Q4 The small angle between magnetic axis and geographic axis at a place is called

• (a) Magnetic inclination
• (b) Magnetic dip
• (c) Magnetic declination
• (d) None of the above

• (c) Magnetic declination

## Q5 Horizontal component of earth at a place is 3.2 x 10^{-5}T, and angle of dip is 60^{0} The resultant intensity of earth’s field at the place is

• a) 3.2 x 10^{-5}T
• b) 1.6 x 10^{-5}T
• c) 6.4 x 10^{-5}T
• d) 12.8 x 10^{-5}T

• c) 6.4 x 10^{-5}T

## Q6 Isogonic lines on magnetic map represent lines of

• (a) Zero declination
• (b) Equal declination
• (c) Equal dip
• (d) Equal horizontal field

• (b) Equal declination

## Q7  At magnetic poles which out of following is zero

• (a) Horizontal component (H) of earth's magnetic field
• (b) Vertical component of earth's magnetic field
• (c) Total strength of earth’s magnetic field(R)
• (d) Magnetic declination

• (a) Horizontal component (H) of earth's magnetic field

## Q8 At a certain place, the horizontal component of earth’s magnetic field is √3 times the vertical component. The angle of dip at that place is

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

• b) 30^{0}

• a) True
• b) False

• a) True

## Q10 At a particular place, horizontal and vertical components of earth’s magnetic field are equal. The angle of dip at that place is

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

• c) 45^{0}