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Recent questions and answers in Magnetism and Matter
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JEEMAIN and NEET
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Physics
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Class12
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Magnetism and Matter
A negatively and uniformly charged disk is rotating in a clockwise direction as viewed from above. The direction of magnetic field at a point A is
jeemain
aipmt
physics
cbse
class12
ch4
ch5
magnetic-effects-of-current-and-magnetism
q50
difficult
answered
Sep 20, 2019
by
prasoonverma514551
1
answer
Suppose a magnet is suspended by a vertical string, attached to its middle point. Given that the horizontal component of earth's magnetic field is $25\;\mu T$ and the vertical component of of earth's magnetic field is $40\;\mu T$, find the position in which the magnet can stay in equilibrium.
jeemain
physics
class12
ch5
magnetism-and-matter
earths-magnetism
easy
answered
Mar 14, 2014
by
balaji.thirumalai
1
answer
Relative permittivity and permeability of a material are $ \in_r$ and $ \mu_r$ , respectively. Which of the following values of these quantities are allowed for a diamagnetic material?
jeemain
aipmt
physics
cbse
class12
ch5
magnetism-and-matter
magnetic-properties-of-materials
easy
answered
Feb 27, 2014
by
thanvigandhi_1
1
answer
A rigid circular loop of radius $ r$ lies in the $x-y$ plane on a flat table and a current $i$ flows through it. At this place, the earth’s magnetic field is $B_x\hat i + B_z \hat k$ . The value of $i$ so that one end of the loop lifts up from the table is
jeemain
aipmt
physics
cbse
class12
ch4
moving-charge-and-magnetism
magnetic-feild-on-axis-of-circular-current-loop
medium
answered
Feb 23, 2014
by
thanvigandhi_1
1
answer
The dimensions of $ \large\frac{B^2C^2R^2}{2\mu_0}$ where $B$ is magnetic field,$ R$ is resistance and $ C$ is capacitance are
jeemain
aipmt
physics
cbse
class12
ch4
ch5
magnetism-and-matter
difficult
answered
Feb 23, 2014
by
thanvigandhi_1
1
answer
A circular loop of radius $R$, carrying a current $i$ lies in the $x-y$ plane with its centre at the origin. The total magnetic flux through the $x-y$ plane is
jeemain
aipmt
physics
cbse
class12
ch4
ch5
magnetic-effects-of-current-and-magnetism
q75
easy
answered
Feb 22, 2014
by
thanvigandhi_1
1
answer
The force experienced by a pole of strength $100\: A-m$ at a distance of $0.2 \: m$ from a short magnet of length $10\: cm$ and pole strength $100\: A-m$ on its axial line will be
jeemain
aipmt
physics
cbse
class12
ch5
magnetism-and-matter
bar-magnet
medium
answered
Feb 22, 2014
by
thanvigandhi_1
1
answer
A bar magnet of magnetic moment $4 A-m^2$ is free to rotate about a vertical axis through its centre. The magnet is released from rest from east-west position. Kinetic energy of the magnet in the north- south position will be $(H = 25 \mu T)$
jeemain
aipmt
physics
cbse
class12
ch5
magnetism-and-matter
bar-magnet
easy
answered
Feb 21, 2014
by
thanvigandhi_1
1
answer
A paramagnetic substance is kept in a weak magnetic field and its absolute temperature $T$ is increased. As a result, its magnetisation
jeemain
aipmt
physics
cbse
class12
ch5
magnetism-and-matter
magnetic-properties-of-materials
medium
answered
Feb 21, 2014
by
thanvigandhi_1
1
answer
If a magnetic needle is kept in a non-uniform magnetic field, it experiences
jeemain
aipmt
physics
cbse
class12
ch5
magnetism-and-matter
easy
answered
Feb 19, 2014
by
thanvigandhi_1
1
answer
Magnetic moment of an electron in the $n^{th}$ orbit of the hydrogen atom is
jeemain
aipmt
physics
cbse
class12
ch4
moving-charge-and-magnetism
magnetic-force
difficult
answered
Feb 19, 2014
by
thanvigandhi_1
1
answer
An electron is moving along positive $ x$-axis. A uniform electric field exists along negative $y$-axis. What should be the direction of the magnetic field (constant) so that the force on the electron is zero?
jeemain
aipmt
physics
cbse
class12
ch4
ch5
magnetic-effects-of-current-and-magnetism
q12
medium
answered
Feb 19, 2014
by
thanvigandhi_1
1
answer
A copper wire of diameter $1.6mm$ carries a current i. The maximum magnetic field due to this wire is $5 \times 10^{-3} T$. The value of $i$ is
jeemain
aipmt
physics
cbse
class12
ch4
ch5
magnetic-effects-of-current-and-magnetism
q11
medium
answered
Feb 19, 2014
by
thanvigandhi_1
1
answer
A positively charged particle projected towards north is deflected towards west by a magnetic field. The field may be
jeemain
aipmt
physics
cbse
class12
ch4
ch5
magnetic-effects-of-current-and-magnetism
q5
easy
answered
Feb 17, 2014
by
thanvigandhi_1
1
answer
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