Physics-
General
Easy

Question

Two fixed charges 4Q (positive) and Q (negative) are located at A and B, the distance AB being 3 m.

  1. The point P where the resultant field due to both is not zero is on AB outside AB.    
  2. The point P where the resultant field due to both is zero is on AB inside AB.    
  3. If a positive charge is placed at P and displaced slightly along AB it will execute oscillations.    
  4. If a negative charge is placed at P and displaced slightly along AB it will execute oscillations.    

The correct answer is: If a negative charge is placed at P and displaced slightly along AB it will execute oscillations.

Related Questions to study

General
physics-

The charge per unit length of the four quadrant of the ring is 2 lambda comma negative 2 lambda comma lambda and negative lambda respectively. The electric field at the centre is

The charge per unit length of the four quadrant of the ring is 2 lambda comma negative 2 lambda comma lambda and negative lambda respectively. The electric field at the centre is

physics-General
General
physics-

Charge density of the given surface is s. Then electric field strength at the centre (of quarter sphere) is

Charge density of the given surface is s. Then electric field strength at the centre (of quarter sphere) is

physics-General
General
physics-

An equilateral triangle wire frame of side L having 3 point charges at its vertices is kept in x-y plane as shown. Component of electric field due to the configuration in z direction at (0,0, L) is [origin is centroid of triangle]

An equilateral triangle wire frame of side L having 3 point charges at its vertices is kept in x-y plane as shown. Component of electric field due to the configuration in z direction at (0,0, L) is [origin is centroid of triangle]

physics-General
parallel
General
physics-

The direction (q) of stack E with rightwards arrow on top at point P due to uniformly charged finite rod will be

The direction (q) of stack E with rightwards arrow on top at point P due to uniformly charged finite rod will be

physics-General
General
physics-

Four equal positive charges are fixed at the vertices of a square of side L. Z-axis is perpendicular to the plane of the square. The point z=0 is the point where the diagonals of the square intersect each other. The plot of electric field due to the four charges, as one moves on the z-axis.

Four equal positive charges are fixed at the vertices of a square of side L. Z-axis is perpendicular to the plane of the square. The point z=0 is the point where the diagonals of the square intersect each other. The plot of electric field due to the four charges, as one moves on the z-axis.

physics-General
General
physics-

Two very long straight parallel wires, parallel to y-axis, carry currents 4I and I, along +y direction and -y direction, respectively. The wires pass through the x-axis at the points (d,0,0) and (-d,0,0) respectively. The graph of magnetic field z-component as one moves along the x-axis from x=-d to x=+d, is best given by

Two very long straight parallel wires, parallel to y-axis, carry currents 4I and I, along +y direction and -y direction, respectively. The wires pass through the x-axis at the points (d,0,0) and (-d,0,0) respectively. The graph of magnetic field z-component as one moves along the x-axis from x=-d to x=+d, is best given by

physics-General
parallel
General
physics-

A thin, straight conductor lies along the axis of a hollow conductor of radius R. The two carry equal currents in the same direction. The magnetic field B is plotted against the distance r from the axis. Which of the following best represents the resulting curve?

A thin, straight conductor lies along the axis of a hollow conductor of radius R. The two carry equal currents in the same direction. The magnetic field B is plotted against the distance r from the axis. Which of the following best represents the resulting curve?

physics-General
General
physics-

Figure shows a long wire bent at the middle to form a right angle. The ratio of B subscript P end subscript colon B subscript Q end subscript colon B subscript R end subscript colon B subscript S end subscript

Figure shows a long wire bent at the middle to form a right angle. The ratio of B subscript P end subscript colon B subscript Q end subscript colon B subscript R end subscript colon B subscript S end subscript

physics-General
General
physics-

Fig shows a coil bent with all edges of length 1 m and carrying a current of 1A. There exists in space a uniform magnetic field of 2 T in the positively y-direction. Find the torque on the loop

Fig shows a coil bent with all edges of length 1 m and carrying a current of 1A. There exists in space a uniform magnetic field of 2 T in the positively y-direction. Find the torque on the loop

physics-General
parallel
General
physics-

Figure shows a square current carrying loop ABCD of side 10 cm and current i=10 A. The magnetic moment stack M with rightwards arrow on top of the loop is

Figure shows a square current carrying loop ABCD of side 10 cm and current i=10 A. The magnetic moment stack M with rightwards arrow on top of the loop is

physics-General
General
physics-

A galvanometer has an internal resistance of 50 capital omega and current required for full scale deflection is 1 mA. Find the series resistances required as shown in fig, to use it as a voltmeter with different ranges, as indicated in fig.

A galvanometer has an internal resistance of 50 capital omega and current required for full scale deflection is 1 mA. Find the series resistances required as shown in fig, to use it as a voltmeter with different ranges, as indicated in fig.

physics-General
General
physics-

Two conductors 1-3-5 and 2-4-6 are connected at equal potentials on resistors R subscript 1 end subscript and R subscript 2 end subscript. if the switch S is closed. Will this lead to change in the reading of an ammeter.

Two conductors 1-3-5 and 2-4-6 are connected at equal potentials on resistors R subscript 1 end subscript and R subscript 2 end subscript. if the switch S is closed. Will this lead to change in the reading of an ammeter.

physics-General
parallel
General
physics-

A rectangular coil PQ has 2n turns, an area 2a and carries a current 2I, (refer figure). The plane of the coil is at 60° to a horizontal uniform magnetic field of flux density B. The torque on the coil due to magnetic force is

A rectangular coil PQ has 2n turns, an area 2a and carries a current 2I, (refer figure). The plane of the coil is at 60° to a horizontal uniform magnetic field of flux density B. The torque on the coil due to magnetic force is

physics-General
General
physics-

A small coil C with N=200 turns is mounted on one of a balance beam and introduced between the poles of an electro magnet as shown in fig. The cross-sectional area of the coil is S equals 1.0 text end text c m to the power of 2 end exponent, the length of the 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 counterweight of mass capital delta m equals 60 m g on the balance pan. Find the magnetic induction at the spot where the coil is located.

A small coil C with N=200 turns is mounted on one of a balance beam and introduced between the poles of an electro magnet as shown in fig. The cross-sectional area of the coil is S equals 1.0 text end text c m to the power of 2 end exponent, the length of the 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 counterweight of mass capital delta m equals 60 m g on the balance pan. Find the magnetic induction at the spot where the coil is located.

physics-General
General
physics-

In the figure shown a coil of single turn is wound on a sphere of radius R and mass m. The plane of the coil is parallel to the plane and lies in the equatorial plane of the sphere. Current in the coil is i. The value of B if the sphere is in equilibrium is

In the figure shown a coil of single turn is wound on a sphere of radius R and mass m. The plane of the coil is parallel to the plane and lies in the equatorial plane of the sphere. Current in the coil is i. The value of B if the sphere is in equilibrium is

physics-General
parallel

card img

With Turito Academy.

card img

With Turito Foundation.

card img

Get an Expert Advice From Turito.

Turito Academy

card img

With Turito Academy.

Test Prep

card img

With Turito Foundation.