List of top Physics Questions

If $\mu_0$ is absolute permeability of vacuum and $\mu_r$ is relative magnetic permeability of another medium, then permeability $\mu$ of the medium is
Imagine rolling a sheet of paper into a cylinder and placing a bar magnet near its end as shown in figure. What can you say about the sign of $\vec{B}.d \vec{A}$ for every area $d \vec{A}$ on the surface?
In a certain place, the vertical component of earth?? magnetic field is 0.5 oersted and dip angle is $60^?$. The earth?? magnetic field at that place is
In the magnetic meridian of a certain place the horizontal component of earth?? magnetic field is 0.25 G and dip angle is $60^?$. The magnetic field of the earth at this location is
Magnetic dipole moment is a vector quantity directed from
Magnetic meridian is
Magnetic susceptibility of a diamagnetic substances
Point out the correct direction of magnetic field in the given figures.
The range of magnetic susceptibility and relative magnetic permeability for diamagnetic substances are
The time period of a freely suspended magnetic needle does not depend upon
The unit of intensity of magnetisation $(I)$ is
Two identical thin bar magnets are placed mutually at right angles such that the north pole of one touches the south pole of the other. The length and the pole strength of each bar are $I$ and $m$. The resultant magnetic moment of the system is :
What is the magnitude of axial field due to a bar magnet of length 3 cm at a distance of 75 cm from its mid-point if its magnetic moment is $0.6\, A\, m^2$?
Which of the following is responsible for the earth?? magnetic field?
Which of the following is not a magnetic substance?
Which of the following is correct about magnetic monopole?
Which of the following instruments is used to measure magnetic field
A current flows in a conducting wire of length L. If we bend it in a circular form, its magnetic dipole moment would be
At a point on the right bisector of a magnetic dipole the magnetic
A conducting rod $AC$ of length $4 l$ is rotated about appoint $O$ in a uniform magnetic field $\vec{B}$ directed into the paper. $ AO=l $ and $ OC=3l $ then:
A wire carrying current $ I $ and other carrying $ 2I $ in the same direction produce a magnetic field B at the mid-point. What will be the field when $ 2I $ wire is switched off?
A particle moves through angular displacement $ \theta $ on a circular path of radius $r$. The linear displacement will be :
A wheel has a speed of 1200 revolutions per minute and is made to slow down at a rate of $4radians/s^2$ The number of revolutions it makes before coming to rest is
Radius of curved road on a highway is $R$. Width of road is $6$. The outer edge of road is raised by $h$ w.r.t. inner edge so that a car with velocity $\upsilon$ can pass safe over it. The value of $h$ is
From the top of a building a ball is dropped while another is thrown horizontally at the same time. Which ball will strike the ground first?