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Chemistry-

General

Easy

Question

The following has lowest p^H

MgSO₄
MgCO₃
NaCl
Sodium oxalate

The correct answer is: MgSO₄

Related Questions to study

In the figure shown 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 $180^{\circ}$ about an axis parallel to the long wire and passing through the mid points of the side QR and PS. The total amount of charge which passes through any point of the loop during rotation is :

In the figure shown 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 $180^{\circ}$ about an axis parallel to the long wire and passing through the mid points of the side QR and PS. The total amount of charge which passes through any point of the loop during rotation is :

physics-General

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

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

physics-General

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

parallel

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

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

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 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

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

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. 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

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

parallel

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

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

parallel

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