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Physics-

General

Easy

Question

The battery shown in the figure is ideal. The values are e = 10 V, R = 5 $capital omega$ , L = 2H . Initially the current in the inductor is zero. The current through the battery at t = 2s is

12 A
7 A
3 A
none of these

The correct answer is: 12 A

Related Questions to study

When the current in the portion of the circuit shown in the figure is 2A and increasing at the rate of 1A/s, the measured potential difference $V_{a} - V_{b} = 8 V$ . However when the current is 2A and decreasing at the rate of 1A/s, the measured potential difference $V_{a} - V_{b} = 4 V$ . The values of R and L are :

When the current in the portion of the circuit shown in the figure is 2A and increasing at the rate of 1A/s, the measured potential difference $V_{a} - V_{b} = 8 V$ . However when the current is 2A and decreasing at the rate of 1A/s, the measured potential difference $V_{a} - V_{b} = 4 V$ . The values of R and L are :

physics-General

A conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced currents in wires AB and CD are :

A conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced currents in wires AB and CD are :

physics-General

A non conducting ring of radius R and mass m having charge q uniformly distributed over its circumference is placed on a rough horizontal surface. A vertical time varying uniform magnetic field $B = 4 t_{2}$ is switched on at time t=0. The coefficient of friction between the ring and the table, if the ring starts rotating at t =2 sec, is

A non conducting ring of radius R and mass m having charge q uniformly distributed over its circumference is placed on a rough horizontal surface. A vertical time varying uniform magnetic field $B = 4 t_{2}$ is switched on at time t=0. The coefficient of friction between the ring and the table, if the ring starts rotating at t =2 sec, is

physics-General

parallel

Two inductor coils of self inductance 3H and 6H respectively are connected with a resistance 10 $Ω$ and a battery 10 V as shown in figure. The ratio of total energy stored at steady state in the inductors to that of heat developed in resistance in 10 seconds at the steady state is (neglect mu(tual inductance between $L_{1}$ and $L_{2}$ ):

Two inductor coils of self inductance 3H and 6H respectively are connected with a resistance 10 $Ω$ and a battery 10 V as shown in figure. The ratio of total energy stored at steady state in the inductors to that of heat developed in resistance in 10 seconds at the steady state is (neglect mu(tual inductance between $L_{1}$ and $L_{2}$ ):

physics-General

An infinitely long wire lying along z-axis carries a current I, flowing towards positive z-direction. There is no other current, consider a circle in x-y plane with centre at (2 meter, 0, 0) and radius 1 meter. Divide the circle in small segments and let $d \vec{l}$ d denote the length of a small segment in anticlockwise direction, as shown. The maximum value of path integral $\int B \cdot d \bar{l}$ of the total magnetic field $\vec{B}$ along the perimeter of the given circle between any two points on the circle is

An infinitely long wire lying along z-axis carries a current I, flowing towards positive z-direction. There is no other current, consider a circle in x-y plane with centre at (2 meter, 0, 0) and radius 1 meter. Divide the circle in small segments and let $d \vec{l}$ d denote the length of a small segment in anticlockwise direction, as shown. The maximum value of path integral $\int B \cdot d \bar{l}$ of the total magnetic field $\vec{B}$ along the perimeter of the given circle between any two points on the circle is

physics-General

An infinitely long wire lying along z-axis carries a current I, flowing towards positive z-direction. There is no other current, consider a circle in x-y plane with centre at (2 meter, 0, 0) and radius 1 meter. Divide the circle in small segments and let $d \vec{l}$ d denote the length of a small segment in anticlockwise direction, as shown. Consider two points A (3,0,0) and B(2,1,0) on the given circle. The path integral $\int_{A}^{B} \vec{B} \cdot d \vec{l}$ of the total magnetic field $\bar{B}$ along the perimeter of the given circle from A to B is,

An infinitely long wire lying along z-axis carries a current I, flowing towards positive z-direction. There is no other current, consider a circle in x-y plane with centre at (2 meter, 0, 0) and radius 1 meter. Divide the circle in small segments and let $d \vec{l}$ d denote the length of a small segment in anticlockwise direction, as shown. Consider two points A (3,0,0) and B(2,1,0) on the given circle. The path integral $\int_{A}^{B} \vec{B} \cdot d \vec{l}$ of the total magnetic field $\bar{B}$ along the perimeter of the given circle from A to B is,

physics-General

parallel

An infinitely long wire lying along z-axis carries a current I, flowing towards positive z-direction. There is no other current, consider a circle in x-y plane with centre at (2 meter, 0, 0) and radius 1 meter. Divide the circle in small segments and let $d \vec{l}$ d denote the length of a small segment in anticlockwise direction, as shown. The path integral $∮ \vec{B} \cdot d \vec{l}$ of the total magnetic field $\vec{B}$ along the perimeter of the given circle is,

An infinitely long wire lying along z-axis carries a current I, flowing towards positive z-direction. There is no other current, consider a circle in x-y plane with centre at (2 meter, 0, 0) and radius 1 meter. Divide the circle in small segments and let $d \vec{l}$ d denote the length of a small segment in anticlockwise direction, as shown. The path integral $∮ \vec{B} \cdot d \vec{l}$ of the total magnetic field $\vec{B}$ along the perimeter of the given circle is,

physics-General

Curves in the graph shown give, as functions of radial distance r, the magnitude B of the magnetic field inside and outside four long wires a, b, c and d, carrying currents that are uniformly distributed across the cross sections of the wires. Overlapping portions of the plots are indicated by double labels. The current density in wire a is

Curves in the graph shown give, as functions of radial distance r, the magnitude B of the magnetic field inside and outside four long wires a, b, c and d, carrying currents that are uniformly distributed across the cross sections of the wires. Overlapping portions of the plots are indicated by double labels. The current density in wire a is

physics-General

Curves in the graph shown give, as functions of radial distance r, the magnitude B of the magnetic field inside and outside four long wires a, b, c and d, carrying currents that are uniformly distributed across the cross sections of the wires. Overlapping portions of the plots are indicated by double labels.

Which wire has the greatest magnitude of the magnetic field on the surface?

Curves in the graph shown give, as functions of radial distance r, the magnitude B of the magnetic field inside and outside four long wires a, b, c and d, carrying currents that are uniformly distributed across the cross sections of the wires. Overlapping portions of the plots are indicated by double labels.

Which wire has the greatest magnitude of the magnetic field on the surface?

physics-General

parallel

Curves in the graph shown give, as functions of radial distance r, the magnitude B of the magnetic field inside and outside four long wires a, b, c and d, carrying currents that are uniformly distributed across the cross sections of the wires. Overlapping portions of the plots are indicated by double labels.

Which wire has the greatest radius ?

Curves in the graph shown give, as functions of radial distance r, the magnitude B of the magnetic field inside and outside four long wires a, b, c and d, carrying currents that are uniformly distributed across the cross sections of the wires. Overlapping portions of the plots are indicated by double labels.

Which wire has the greatest radius ?

physics-General

A small particle of mass m = 1kg and charge of 1C enters perpendicularly in a triangular region of uniform magnetic field of strength 2T as shown in figure :

Calculate maximum velocity of the particle with which it should enter so that it complete a half–circle in magnetic region:

A small particle of mass m = 1kg and charge of 1C enters perpendicularly in a triangular region of uniform magnetic field of strength 2T as shown in figure :

Calculate maximum velocity of the particle with which it should enter so that it complete a half–circle in magnetic region:

physics-General

A straight wire current element is carrying current 100 A, as shown in the figure. The magnitude of magnetic field at point P which is at perpendicular distance $left parenthesis square root of 3 minus 1 right parenthesis m$ from the current element if end A and end B of the element subtend angle $30 to the power of ring operator end exponent$ and $60 to the power of ring operator end exponent$ at point P, as shown, is :

A straight wire current element is carrying current 100 A, as shown in the figure. The magnitude of magnetic field at point P which is at perpendicular distance $left parenthesis square root of 3 minus 1 right parenthesis m$ from the current element if end A and end B of the element subtend angle $30 to the power of ring operator end exponent$ and $60 to the power of ring operator end exponent$ at point P, as shown, is :

physics-General

parallel

Determine the magnetic field at the centre of the current carrying wire arrangement shown in the figure. The arrangement extends to infinity. (The wires joining the successive squares are along the line passing through the centre)

Determine the magnetic field at the centre of the current carrying wire arrangement shown in the figure. The arrangement extends to infinity. (The wires joining the successive squares are along the line passing through the centre)

physics-General

Two long cylinders (with axis parallel) are arranged as shown to form overlapping cylinders, each of radius r, whose centers are separated by a distance d. Current of density J (Current per unit area) flows into the plane of page along the right shaded part of one cylinder and an equal current flow out of the plane of the page along the left shaded part of the other, as shown in the figure. The magnitude and direction of magnetic field at point O (O is the origin of shown x-y axes) are

Two long cylinders (with axis parallel) are arranged as shown to form overlapping cylinders, each of radius r, whose centers are separated by a distance d. Current of density J (Current per unit area) flows into the plane of page along the right shaded part of one cylinder and an equal current flow out of the plane of the page along the left shaded part of the other, as shown in the figure. The magnitude and direction of magnetic field at point O (O is the origin of shown x-y axes) are

physics-General

A long straight wire, carrying current I, is bent at its midpoint to form an angle of $45 to the power of ring operator end exponent$ Magnetic field at point P, distance R from point of bending is equal to :

A long straight wire, carrying current I, is bent at its midpoint to form an angle of $45 to the power of ring operator end exponent$ Magnetic field at point P, distance R from point of bending is equal to :

physics-General

parallel

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