Using Lenz’s law
A small, circular ring is inside a larger loop that is connected to a battery and a switch as shown in Fig. 3.25. Use Lenz’s law to find the direction of the current induced in the small ring (a) just after switch S is closed, (b) after Shas been closed for a long time, ( c) just after S has been reopened after being closed for a long time.
19
Oct
A small, circular ring is inside a larger loop that is connected to a battery and a switch as shown in Fig. 3.25. Use Lenz’s law to find the direction of the current induced in the small ring (a) just after switch S is closed, (b) after Shas been closed for a long time, ( [...]
A square loop of wire with resistance R is moved at constant speed v across a uniform magnet field confined to a square region whose sides are twice the lengths of those of the square loop (a) Sketch a graph of the external forces F needed to move the loop at constant speed, as a function of to sketch a graph of the external force F need tho coordinate x, fromx=−2L to x=+2L. (The coordinate x is measured from the centre of the oignetic field region to the centre of the loop. It is negative when the centre of the loop is to the left, of the centre of the magnetic field region. Take positive force to be to the right). (b) Sketch a graph of the induced current in the loop as a function of x. Take counterclockwise currents to be positive.
19
Oct
A square loop of wire with resistance R is moved at constant speed v across a uniform magnet field confined to a square region whose sides are twice the lengths of those of the square loop (a) Sketch a graph of the external forces F needed to move the loop at constant speed, as a [...]
The wire as shown in figure is bent in the shape of a tent, with θ = 60∘ and L = 1.50 m and is placed in a uniform magnetic field of magnitude 0.300T perpendicular to the table rigid but hinged at points a and b. If the tent is flattened out on the table in 0.100 sec, what is the average induced emf in the wire during this time ?
19
Oct
The wire as shown in figure is bent in the shape of a tent, with θ = 60∘ and L = 1.50 m and is placed in a uniform magnetic field of magnitude 0.300T perpendicular to the table rigid but hinged at points a and b. If the tent is flattened out on the table [...]
Tags:
is ,
so that the magnet gets demagnetized when inside the solenoid ,
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 ,
The wire as shown in figure is bent in the shape of a tent ,
Using Lenz's law ,
Figure shows a coil placed in a decreasing magnetic field applied perpendicular to the plane of the coil. The magnetic field is decreasing at a rate of 10 T/s. Find out current in magnitude and direction of current.
19
Oct
Figure shows a coil placed in a decreasing magnetic field applied perpendicular to the plane of the coil. The magnetic field is decreasing at a rate of 10 T/s. Find out current in magnitude and direction of current. is so that the magnet gets demagnetized when inside the solenoid The coercitivity of a small magnet [...]
Using Lenz’s law, determine the direction of the current in resistor ab in Fig. 3.23 when (a) switch S is opended after having been closed for several minutes. (b) coil B is brought closer to coil A with the swich closed. ltbr. ( c) the resistance of R is decreased while the switch remains closed
19
Oct
Using Lenz’s law, determine the direction of the current in resistor ab in Fig. 3.23 when (a) switch S is opended after having been closed for several minutes. (b) coil B is brought closer to coil A with the swich closed. ltbr. ( c) the resistance of R is decreased while the switch remains closed [...]