AP EAPCET 2024 - 21th May Evening Shift | Magnetism and Matter Question 2 | Physics

At a place the horizontal component of earth's magnetic field $3 \times 10^{-5} \mathrm{~T}$ and the magnetic declination is $30^{\circ}$. A compass needle of magnetic moment $18 \mathrm{Am}^2$ pointing towards geographic north at this place experiences a torque of

$36 \times 10^{-5} \mathrm{Nm}$

$18 \times 10^{-5} \mathrm{Nm}$

$54 \times 10^{-5} \mathrm{Nm}$

$27 \times 10^{-5} \mathrm{Nm}$

AP EAPCET 2024 - 21th May Morning Shift

MCQ (Single Correct Answer)

-0

If the vertical component of the earth's magnetic field is 0.45 G at a location and angle of dip is $60^{\circ}$, then magnetic field of earth in that location is

0.26 G

0.52 G

0.3 G

0.7 G

AP EAPCET 2024 - 20th May Evening Shift

MCQ (Single Correct Answer)

-0

At a place where the magnitude of the earth's magnetic field is $4 \times 10^{-5} \mathrm{~T}$, a short bar magnet is placed with its axis perpendicular to the earth's magnetic field direction. If the resultant magnetic field at a point at a distance of 40 cm from the centre of the magnet on the normal bisector of the magnet is inclined at $45^{\circ}$ with the earth's field, then the magnele moment of the magnet is

$38.4 \mathrm{Am}^2$

$51.2 \mathrm{Am}^2$

$12.8 \mathrm{Am}^2$

$25.6 \mathrm{Am}^3$

AP EAPCET 2024 - 20th May Morning Shift

MCQ (Single Correct Answer)

-0

Any magnetic material loses its magnetic property when it is

dipped in water

dipped in sand

attached to an iron piece

heated to high temperature

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