चुम्बकीय क्षेत्र रेखाए Magnetic Field Lines Ch 5 Lec 3 || 12th/JEE/NEET Physics By Gopal Sir✔

1. Electric monopoles doesnt exist wheras magnetic monopoles exist 2. magnetic lines of solenoid at its ends and outside are not perfectly straight 3. magnetic field lines of toroid are confined in it 4. magnetic lines are not parallel inside bar magnet 5. perfect diamagnetic to chi = -1 which of the following statements are correct?

A plane electromagnetic wave of frequency 5 GHz is propagating in vacuum along the z-direction. At a particular point in space and time, the magnetic field is given by vecB = 12xx210^(-8) JT. The corresponding electric field vecE is (speed of light c = 3xx10^s ms^(-1) )

Finding total energy stored in a magnetic field for a length of coaxial cable from the energy density Finding total energy stored in a magnetic field for a length of coaxial cable from the energy density (b) What is the stored energy per unit length of the cable if a= 1.2 mm, b = 3.5 mm, and i = 2.7 A?

A short bar magnet is placed in a horizontal plane with its axis in the magnetic merdian . Null points are found on its equitorial line (i.e., its normal bisector) at 12.5 G and the angle of dip is zero. (i) What is the total magnetic field at points on the axis of the magnet located by the same distance (12.5 cm) as the null-points from the centre? (ii) Locate the null points when the magnet is turned around by 180^(@) . Assume that the length of the magnet is negligible as compared to the distance of the null-point from the centre of the magnet.

A uniform magnetic field of intensity 1T is applied in a circular region of radius 0.1 m , directed into the plane of paper. A charged particle of mass 5xx10^(-5)kg and charge q=5xx10^(-4)C enters the field with velocity 1//sqrt(3)m//s making an angle of phi with a radial line of circular region in such a way that it passes through centre of applied field the angle phi is

A rectangular loop of sides 10 cm and 5 cm carrying a current 1 of 12 A is placed in different orientations as shown in the figure below: If there is auniform magnetic field of 0.3 t in the positive z direction , in which orientations the loop would be in (i) stable equilibrium and (ii) unstable equilibrium ?

Shows a convex lens of focal length 12 cm lying in a uniform magnetic field B of magnitude 1.2 T parallel to its principal axis. A particle having a charge 2.0X 10^(-3) C and mass 2.0 X 10^(-5) kg is projected perpendiucular to the plane of the diagram with a speed of 4.8 ms ^(-1). The particle moves along a circle with its centre on the principal axis at a distance of 18 cm from the lens. Show that the image of the particle goes along a circle end find the radius of thet circle.

A physics lab is designed to study the transfer of electrial energy from one circuit to another by means of a magnetic field using simple transformers. Each transformer has two coils of wire electrically insulated from each other but wound a round a common core of ferromagnetic material. The two wires are close together but do not touch each other The primary (1^(@)) coil is connected to a source of alternating (AC) current. The secondary (2^(@)) coil is connected to resistor such as a light bulb. The AC source produces on oscillating voltage and current in the primary coil that produces an oscillating megnetic field in the core. material. This in turn induces an oscillating voltage and AC curent in the secondary coil Students collected the following data comparing the number of turns per coil (N) , the voltage (V) and the current (I) in the coils of three transformers. |{:("Transformer","primary coil","Secondary coil"),(1,100 . 10V.10A,200.20V.5A),(2,100.10V.10A,50.5V.5A),(3,100.10V.10A,100.5V.20A):}| A 12 V battery is used to supply 2.0 mA of current to the 300 turns in the primary coil of a given transformer. What is the current in the secondary coil if N_(2) = 150 turns.