Physics-
General
Easy

Question

A particle of specific charge (q/m) is projected from the origin of coordinates with initial velocity [ui - vj] Uniform electric magnetic fields exist in the region along the +y direction, of magnitude E and B. The particle will definitely return to the origin once if

  1. left square bracket v B divided by 2 pi E right square bracket is an integer    
  2. open parentheses u to the power of 2 end exponent plus v to the power of 2 end exponent close parentheses to the power of 1 divided by 2 end exponent left square bracket B divided by pi E right square bracket is an integer    
  3. left square bracket v B divided by pi E right ceiling is an integer    
  4. left ceiling u B divided by pi E right ceiling is an integer    

The correct answer is: left square bracket v B divided by pi E right ceiling is an integer

Related Questions to study

General
Physics-

A particle moving with velocity v having specific charge (q/m) enters a region of magnetic field B having width d equals fraction numerator 3 m v over denominator 5 q B end fraction at angle 53° to the boundary of magnetic field. Find the angle q in the diagram.

A particle moving with velocity v having specific charge (q/m) enters a region of magnetic field B having width d equals fraction numerator 3 m v over denominator 5 q B end fraction at angle 53° to the boundary of magnetic field. Find the angle q in the diagram.

Physics-General
General
Physics-

A charged particle enters a uniform magnetic field perpendicular to its initial direction travelling in air. The path of the particle is seen to follow the path in figure. Which of statements 1-3 is/are correct? [1] The magnetic field strength may have been increased while the particle was travelling in air [2] The particle lost energy by ionising the air [3] The particle lost charge by ionising the air

A charged particle enters a uniform magnetic field perpendicular to its initial direction travelling in air. The path of the particle is seen to follow the path in figure. Which of statements 1-3 is/are correct? [1] The magnetic field strength may have been increased while the particle was travelling in air [2] The particle lost energy by ionising the air [3] The particle lost charge by ionising the air

Physics-General
General
Physics-

A particle of specific charge alpha (charge per unit mass) is released at time t=0 from origin with an initial velocity of stack v with rightwards arrow on top equals v subscript 0 end subscript stack i with ˆ on top in a uniform magnetic field stack B with rightwards arrow on top equals negative B subscript 0 end subscript stack k with ˆ on top. Find position of particle at any time t.

A particle of specific charge alpha (charge per unit mass) is released at time t=0 from origin with an initial velocity of stack v with rightwards arrow on top equals v subscript 0 end subscript stack i with ˆ on top in a uniform magnetic field stack B with rightwards arrow on top equals negative B subscript 0 end subscript stack k with ˆ on top. Find position of particle at any time t.

Physics-General
parallel
General
Physics-

A block of mass m & charge q is released on a long smooth inclined plane magnetic field B is constant, uniform, horizontal and parallel to surface as shown. Find the time from start when block loses contact with the surface.

A block of mass m & charge q is released on a long smooth inclined plane magnetic field B is constant, uniform, horizontal and parallel to surface as shown. Find the time from start when block loses contact with the surface.

Physics-General
General
Physics-

The direction of magnetic force on the electron as shown in the diagram is along

The direction of magnetic force on the electron as shown in the diagram is along

Physics-General
General
Physics-

A mass spectrometer is a device which select particle of equal mass. An ion with electric charge q>0 and mass m starts at rest from a source S and is accelerated through a potential difference V. It passes through a hole into a region of constant magnetic field stack B with rightwards arrow on top perpendicular to the plane of the paper as shown in the figure. The particle is deflected by the magnetic field and emerges through the bottom hole at a distance d from the top hole. The mass of the particle is

A mass spectrometer is a device which select particle of equal mass. An ion with electric charge q>0 and mass m starts at rest from a source S and is accelerated through a potential difference V. It passes through a hole into a region of constant magnetic field stack B with rightwards arrow on top perpendicular to the plane of the paper as shown in the figure. The particle is deflected by the magnetic field and emerges through the bottom hole at a distance d from the top hole. The mass of the particle is

Physics-General
parallel
General
Physics-

A charged particle A of charge q=2C has velocity v=100m/s. When it passes through point A and has velocity in the direction shown. The strength of magnetic field at point B due to this moving charge is (r=2m).

A charged particle A of charge q=2C has velocity v=100m/s. When it passes through point A and has velocity in the direction shown. The strength of magnetic field at point B due to this moving charge is (r=2m).

Physics-General
General
Physics-

A current I flows in along straight wire with cross section having the form a half circular ring of radius R The magnetic field induction at the point O is

A current I flows in along straight wire with cross section having the form a half circular ring of radius R The magnetic field induction at the point O is

Physics-General
General
Physics-

An infinitely long wire is bent in the form of a semicircle at the end as shown in the figure. It carries current I along abcdo. If radius of the semicircle be R, then the magnetic field at 'O' which is the center of the circular part is,

An infinitely long wire is bent in the form of a semicircle at the end as shown in the figure. It carries current I along abcdo. If radius of the semicircle be R, then the magnetic field at 'O' which is the center of the circular part is,

Physics-General
parallel
General
Physics-

Two wires A and B are of lengths 40cm and 30cm. A is bent into a circle of radius r and B into an arc of radius r. A current i subscript 1 end subscript is passed through A and i subscript 2 end subscript through B. To have the same magnetic inductions at the centre, the ratio of i subscript 1 end subscript colon i subscript 2 end subscript is

Two wires A and B are of lengths 40cm and 30cm. A is bent into a circle of radius r and B into an arc of radius r. A current i subscript 1 end subscript is passed through A and i subscript 2 end subscript through B. To have the same magnetic inductions at the centre, the ratio of i subscript 1 end subscript colon i subscript 2 end subscript is

Physics-General
General
Physics-

Equal current 'i' flows in the two segments of a circular loop in the direction shown in fig. radius of the loop is 'a'. Magnetic field at the centre of the loop is,

Equal current 'i' flows in the two segments of a circular loop in the direction shown in fig. radius of the loop is 'a'. Magnetic field at the centre of the loop is,

Physics-General
General
Physics-

An infinitely long conductor PQR is bent to form a right angle as shown. A current I flows through PQR. The magnetic field due to this current at the point M is B subscript 1 end subscript. Now another infinitely long straight conductor QS is connected to Q so that the current is, 1/2 in QR as well as in QS, the current in PQ remaining unchanged. The magnetic field at M is now B subscript 2 end subscript. The ratio B subscript 1 end subscript divided by B subscript 2 end subscript is given by

An infinitely long conductor PQR is bent to form a right angle as shown. A current I flows through PQR. The magnetic field due to this current at the point M is B subscript 1 end subscript. Now another infinitely long straight conductor QS is connected to Q so that the current is, 1/2 in QR as well as in QS, the current in PQ remaining unchanged. The magnetic field at M is now B subscript 2 end subscript. The ratio B subscript 1 end subscript divided by B subscript 2 end subscript is given by

Physics-General
parallel
General
Physics-

Two long parallel conductors carry currents i subscript 1 end subscript equals 3 A and i subscript 2 end subscript equals 3 A both are directed into the plane of paper. The magnitude of resultant magnetic field at point ' P ' is,

Two long parallel conductors carry currents i subscript 1 end subscript equals 3 A and i subscript 2 end subscript equals 3 A both are directed into the plane of paper. The magnitude of resultant magnetic field at point ' P ' is,

Physics-General
General
Physics-

When 0.005A current flows through a moving coil galvanometer, it gives full scale deflection. It is converted into a voltmeter to read 5 Volt, using an external resistance of 975 capital omega. The resistance of galvanometer in ohms is

When 0.005A current flows through a moving coil galvanometer, it gives full scale deflection. It is converted into a voltmeter to read 5 Volt, using an external resistance of 975 capital omega. The resistance of galvanometer in ohms is

Physics-General
General
Physics-

The force exerted by the conductor AB on the loop CDFG shown in figure is

The force exerted by the conductor AB on the loop CDFG shown in figure 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.