Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
A conducting ring is placed near a solenoid as shown in Fig.3.21. Find the direction of the induced current in the ring. (a) At the instant the switch in the circuit containing the solenoid is closed. (b) After the switch has been closed for a long time. (c) At the instant the switch is opened.
19
Oct
A conducting ring is placed near a solenoid as shown in Fig.3.21. Find the direction of the induced current in the ring. (a) At the instant the switch in the circuit containing the solenoid is closed. (b) After the switch has been closed for a long time. (c) At the instant the switch is opened. [...]
A cube of edge length l = 2.50 cm is positioned as shown in Fig. 3.20. A uniform magnetic field given by B = ( 5.00 iˆ+ 4.00 jˆ+ 3.00 kˆ)T exists throughout the region. (a) Calculate the flux through the shaded face. (b) What is the total flux through the six faces ?
19
Oct
A cube of edge length l = 2.50 cm is positioned as shown in Fig. 3.20. A uniform magnetic field given by B = ( 5.00 iˆ+ 4.00 jˆ+ 3.00 kˆ)T exists throughout the region. (a) Calculate the flux through the shaded face. (b) What is the total flux through the six faces ? is [...]
Identify the direction of induced current as seen from the above in the following cases
19
Oct
Identify the direction of induced current as seen from the above in the following cases Identify the direction of induced current as seen from the above in the following cases October 19, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
The coercitivity of a small magnet where the ferromagnet gets demagnetized is 3× 10^3 A/m. The current required to be passed in a solenoid of length 10cm and number of turns 100, so that the magnet gets demagnetized when inside the solenoid , is :
19
Oct
The coercitivity of a small magnet where the ferromagnet gets demagnetized is 3× 10^3 A/m. The current required to be passed in a solenoid of length 10cm and number of turns 100, so that the magnet gets demagnetized when inside the solenoid , is : is so that the magnet gets demagnetized when inside the [...]
Hysteresis loops for two magnetic materials A and B are given below: These materials are used to make magnets for electric generators , transformer core and electromagnet core. Then it is proper to use :
19
Oct
Hysteresis loops for two magnetic materials A and B are given below: These materials are used to make magnets for electric generators , transformer core and electromagnet core. Then it is proper to use : Hysteresis loops for two magnetic materials A and B are given below: These materials are used to make magnets for [...]
A magnetic needle of magnetic moment 6.7 x 10^-2 Am^2 and moment of interia 7.5 x 10^-6 Kg m^2 is performing simple harmonic oscillation in a magnetic field of 0.01 T. time taken for 10 complete oscillation is
19
Oct
A magnetic needle of magnetic moment 6.7 x 10^-2 Am^2 and moment of interia 7.5 x 10^-6 Kg m^2 is performing simple harmonic oscillation in a magnetic field of 0.01 T. time taken for 10 complete oscillation is The magnet of a vibration magnetometer is heated so as to reduce its magnetic moment by 36 [...]
Two short bar magnets of length 1 cm each have magnetic moments 1.20 Am^2 and 1.00 Am^2 respectively. They are placed on a horizontal table parallel to each other with their N poles pointing towards the south. They have a common magnetic equator and are separted by a distance of 20.0cm. The value of the resultant horizontal magnetic induction at the mid – point O of the line joining their centres is close to (Horizontal component of earths magnetic induction is 3.6 × 10.5 Wb/m^2
19
Oct
Two short bar magnets of length 1 cm each have magnetic moments 1.20 Am^2 and 1.00 Am^2 respectively. They are placed on a horizontal table parallel to each other with their N poles pointing towards the south. They have a common magnetic equator and are separted by a distance of 20.0cm. The value of the [...]
A small coil C with N = 200 turns is mounted on one end of a balance beam and introduced between the poles of an electromagnet as shown in figure. The cross sectional area of coil is A = 1.0 cm^2, length of arm OA of the balance beam is l = 30 cm. When there is no current in the coil the balance is in equilibrium. On passing a current I = 22 mA through the coil the equilibrium is restored by putting the additional counter weight of mass Δm = 60 mg on the balance pan. Find the magnetic induction at the spot where coil is located.
19
Oct
A small coil C with N = 200 turns is mounted on one end of a balance beam and introduced between the poles of an electromagnet as shown in figure. The cross sectional area of coil is A = 1.0 cm^2, length of arm OA of the balance beam is l = 30 cm. When [...]
Tags:
A small coil C with N = 200 turns is mounted on one end of a balance beam and introduced between the poles of an electromagnet as shown in figure. The cross sectional area of coil is A = 1.0 cm^2 ,
The magnet of a vibration magnetometer is heated so as to reduce its magnetic moment by 36 %. By doing this the period time of the magnetometer will ,
Two short magnets of equal dipole moments M are fastened perpendicularly at their centres (figure). The magnitude of the magnetic field at a distance d from the centre on the bisector of the right angle is
18
Oct
Two short magnets of equal dipole moments M are fastened perpendicularly at their centres (figure). The magnitude of the magnetic field at a distance d from the centre on the bisector of the right angle is The magnet of a vibration magnetometer is heated so as to reduce its magnetic moment by 36 %. By [...]
Two magnets A and B are identical and these are arranged as shown in the figure. Their length is negligible in comparison to the separation between them. A magnetic needle is placed between the magnets at point P which gets deflected through an angle θ under the influence of magnets. The ratio of distance d1 and d2 will be
18
Oct
Two magnets A and B are identical and these are arranged as shown in the figure. Their length is negligible in comparison to the separation between them. A magnetic needle is placed between the magnets at point P which gets deflected through an angle θ under the influence of magnets. The ratio of distance d1 [...]