the current in wire AB is ( ab is one of the diameters )
A triangular wire frame (each side = 2 m) is placed in a region of time variant magnetic field dB/dt = ( root 3 )T/s. The magnetic field is perpendicular to the plane of the triangle and its centre coincides with the centre of triangle. The base of the triangle AB has a resistance 1(Ω) while the other two sides have resistance 2(Ω) each. The magnitude of potential difference between the points A and B will be
20
Oct
A triangular wire frame (each side = 2 m) is placed in a region of time variant magnetic field dB/dt = ( root 3 )T/s. The magnetic field is perpendicular to the plane of the triangle and its centre coincides with the centre of triangle. The base of the triangle AB has a resistance 1(Ω) [...]
A small square loop of edge a and resistance R is moved with velocity v0 away from an infinitely long current carrying conductor carrying current I so that the conductor and side of square are always in same plane. Find induced current in loop at a separation of r
20
Oct
A small square loop of edge a and resistance R is moved with velocity v0 away from an infinitely long current carrying conductor carrying current I so that the conductor and side of square are always in same plane. Find induced current in loop at a separation of r the current in wire AB is [...]
A conducting ring of radius r and resistance R rolls on a horizontal surface with constant velocity v. The magnetic field B is uniform and is normal to the plane of the loop. Choose the correct option.
20
Oct
A conducting ring of radius r and resistance R rolls on a horizontal surface with constant velocity v. The magnetic field B is uniform and is normal to the plane of the loop. Choose the correct option. the current in wire AB is ( ab is one of the diameters ) The radius of the [...]
A conducting wire of length `l` and mass `m` is placed on two inclined rails as shown in figure. A current `I` is flowig in the wire in the direction shown When no magnetic field is present in the region, the wire is just on the verge of sliding. When a vertically upward magnetic field is switched on, the wire starts moving up the incline. The distance travelled by the wire as a function of time `t` will be
20
Oct
A conducting wire of length `l` and mass `m` is placed on two inclined rails as shown in figure. A current `I` is flowig in the wire in the direction shown When no magnetic field is present in the region, the wire is just on the verge of sliding. When a vertically upward magnetic field [...]
A line charge λ per unit length is pasted uniformly on to the rim of a wheel of mass m and radius R. The wheel has light non-conducting spokes and is free to rotate about a vertical axis as shown in figure. A uniform magnetic field extends over a radial region of radius r given by B = −B 0 k ^ ( r≤a ; a<R ) = 0 (otherwise). What is the angular velocity of the wheel when this field is suddenly switched off ?
20
Oct
A line charge λ per unit length is pasted uniformly on to the rim of a wheel of mass m and radius R. The wheel has light non-conducting spokes and is free to rotate about a vertical axis as shown in figure. A uniform magnetic field extends over a radial region of radius r given [...]
The magnetic flux density B is changing in magnitude at a constant rate dB/dt. A given mass m of copper, drawn into a wire of radius a and formed into a circular loop of radius r is placed perpendicular to the field B. The induced current in the loop is i. The resistivity of copper is ρ and density is d. The value of the induced current i is
20
Oct
The magnetic flux density B is changing in magnitude at a constant rate dB/dt. A given mass m of copper, drawn into a wire of radius a and formed into a circular loop of radius r is placed perpendicular to the field B. The induced current in the loop is i. The resistivity of copper [...]
Tags:
the current in wire AB is ( ab is one of the diameters ) ,
The magnetic flux density B is changing in magnitude at a constant rate dB/dt. A given mass m of copper ,
The radius of the circular conducting loop shown in figure is R. Magnetic field is decreasing at a constant rate alpha. Resistance per unit length of the loop is rho. Then ,
A rod of length `L` rotates in the form of a conical pendulum with an Angular velocity `omega ` about its axis as shown in Fig. 3.165. The rod makes an angle `theta` with the axis. The magnitude of the motional emf developed across the two emf of the rod is
20
Oct
A rod of length `L` rotates in the form of a conical pendulum with an Angular velocity `omega ` about its axis as shown in Fig. 3.165. The rod makes an angle `theta` with the axis. The magnitude of the motional emf developed across the two emf of the rod is the current in wire [...]
Loop A of radius r << R moves toward loop B with a constant velocity V in such a way that their planes are always parallel. what is the the distance between the two loops ( x ) when the induced emf in loop A is maximum ?
20
Oct
Loop A of radius r << R moves toward loop B with a constant velocity V in such a way that their planes are always parallel. what is the the distance between the two loops ( x ) when the induced emf in loop A is maximum ? the current in wire AB is ( [...]
A square loop PQRS of side ‘a’ and resistance ‘r’ is placed near an infinitely long wire carrying a constant current I. The sides PQ and RS are parallel to the wire. The wire and the loop are in the same plane. The loop is rotated by 180∘ about an axis parallel to the long wire and passing through the mid points of the side QR and PS. The total amont of charge which passes through any point of the loop during rotation is:
20
Oct
A square loop PQRS of side ‘a’ and resistance ‘r’ is placed near an infinitely long wire carrying a constant current I. The sides PQ and RS are parallel to the wire. The wire and the loop are in the same plane. The loop is rotated by 180∘ about an axis parallel to the long [...]
A wooden stick of length 3l is rotated about an end with constant angular velocity ω in a uniform magnetic field B perpendicular to the plane of motion. If the upper one-third of its length is coated with copper, the potential difference across the whole length of the stick is
20
Oct
A wooden stick of length 3l is rotated about an end with constant angular velocity ω in a uniform magnetic field B perpendicular to the plane of motion. If the upper one-third of its length is coated with copper, the potential difference across the whole length of the stick is the current in wire AB [...]