A thin circular wire carrying a current $I$ has a magnetic moment $M$. The shape of the wire is changed to a square and it carries the same current. It will have a magnetic moment
Medium
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1A moving coil galvanometer of resistance $100 \,\Omega$ is used as an ammeter using a resistance $0.1 \,\Omega$. The maximum deflection current in the galvanometer is $100\,\mu A$. Find the minimum current in the circuit so that the ammeter shows maximum deflection ............... $mA$View Solution
- 2A loop is moulded by a constant length current carrying wire and placed in external magnetic field, then torque acts on it does not depends uponView Solution
$(a)$ Shape of loop
$(b)$ Area of loop.
$(c)$ Current in loop
$(d)$ External magnetic field.
- 3A charged particle moves in a magnetic field $\vec B = 10\,\hat i$ with initial velocity $\vec u = 5\hat i + 4\hat j$ The path of the particle will beView Solution
- 4A steady current $I$ flows along an infinitely long hollow cylindrical conductor of radius $R$. This cylinder is placed coaxially inside an infinite solenoid of radius $2 \ R$. The solenoid has $n$ turns per unit length and carries a steady current $I$. Consider a point $P$ at a distance $r$ from the common axis. The correct statement$(s)$ is (are) :View Solution
$(A)$ In the region $0 < r < R$, the magnetic field is non-zero.
$(B)$ In the region $R < r < 2 R$, the magnetic field is along the common axis.
$(C)$ In the region $R < r < 2 R$, the magnetic field is tangential to the circle of radius $r$, centered on the axis.
$(D)$ In the region $r > 2 R$, the magnetic field is non-zero.
- 5A wire carrying $I$ is shaped as shown. Section $AB$ is a quarter circle of radius $r.$ The magnetic field at $C$ is directedView Solution
- 6View SolutionAssertion : If the current in a solenoid is reversed in direction while keeping the same magnitude, the magnetic field energy stored in the solenoid remains unchanged.
Reason : Magnetic field energy density is proportional to the magnetic field.
- 7View SolutionIn a current carrying long solenoid, the field produced does not depend upon
- 8A rectangular region $A B C D$ contains a uniform magnetic field $B_0$ directed perpendicular to the plane of the rectangle. A narrow stream of charged particles moving perpendicularly to the side $AB$ enters this region and is ejected through the adjacent side $B C$ suffering a deflection through $30^{\circ}$. In order to increase this deflection to $60^{\circ}$, the magnetic field has to beView Solution
- 9View SolutionOne Tesla is equal to
- 10View SolutionIn the given figure, the electron enters into the magnetic field. It deflects in ...... direction
