A circular loop of mass m and radius r in X-Y plane of a horizontal table as shown in figure. A uniform magnetic field B is applied parallel to X-axis

1 Answer

Answer :

A circular loop of mass m and radius r in X-Y plane of a horizontal table as shown in figure. A uniform ... . `(mg)/(2pirB)` D. `(pirB)/(mgl)`

Related questions

Description : A circular flexible loop of wire of radius r carrying a current I is placed in a uniform magnetic field B . If B is doubled, then tension in the loop

Last Answer : A circular flexible loop of wire of radius r carrying a current I is placed in a uniform magnetic field ... is doubled C. is halved D. becomes 4 times

Description : A uniform conducting ring of mass `pi` kg and radius 1 m is kept on smooth horizontal table. A uniform but time varying magnetic field `B = (hat (i) +

Last Answer : A uniform conducting ring of mass `pi` kg and radius 1 m is kept on smooth horizontal table. A uniform but time ... `(2)/(3pi)kJ` D. `(1)/(pi)kJ`

Description : A uniform conducting ring of mass `pi` kg and radius 1 m is kept on smooth horizontal table. A uniform but time varying magnetic field `B = (hat (i) +

Last Answer : A uniform conducting ring of mass `pi` kg and radius 1 m is kept on smooth horizontal table. A uniform but time ... `(5)/(pi)s` D. `(25)/(pi)s`

Description : The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4cm from the centre is `54muT`. What

Last Answer : The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of ... T` C. `125 mu T` D. `75 mu T`

Description : A conducting loop carrying a current `I` is placed in a uniform magnetic field ponting into the plane of the paper as shown. The loop will have a tend

Last Answer : A conducting loop carrying a current `I` is placed in a uniform magnetic field ponting into the plane of the ... +ve X-axis D. move towards -ve X-axis

Description : A proton is moving in a uniform magnetic field B in a circular path of radius a in a direction perpendicular to Z- axis along which field B exists. Ca

Last Answer : A proton is moving in a uniform magnetic field B in a circular path of radius a in a direction perpendicular to Z- ... 2)a` C. `a^(2) eB` D. `aeB`

Description : An infinitely long conductor is bent into a circle as shown in figure. It carries a current I ampere and the radius of loop is R metre. The magnetic i

Last Answer : An infinitely long conductor is bent into a circle as shown in figure. It carries a current I ampere and the radius ... (0)I)/(8piR)(pi + 1)` D. zero

Description : 1. Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop. -Physics-10

Last Answer : Solution: For the downward direction of the current, the direction of the magnetic field will be as if emerging from the table outside the loop and merging with the table inside the loop. Similarly, ... the table outside the loop and merging with the table inside the loop, as shown in the figure.

Description : An ELECTRON moving horizontally along the +x axis enters a region of space with a horizontal uniform magnetic field pointing in the +y direction. The electron will be deflected: w) -y direction x) +y direction y) -z direction z) +z direction

Last Answer : ANSWER: Y -- -Z DIRECTION

Description : An electron and a proton are moving at the same speed in circular paths in the same uniform magnetic field. The radius of the path of the proton is one of the following. Is this radius: w) the same ... of the electron y) a little larger than that of the electron z) smaller than that of the electron

Last Answer : ANSWER: X -- ABOUT 2000 TIMES LARGER THAN THAT OF THE ELECTRON

Description : When a uniform magnetic field B is applied to a current carrying coil, the coil will rotate in such a manner that its plane a) becomes parallel to B b) becomes anti-parallel to B c) makes an angle of 600 with B d) becomes perpendicular to B

Last Answer : d) becomes perpendicular to B

Description : A charged particle is rotating in uniform circular motion in a uniform magnetic field . Let r= radius of circule, v= speed of particle k = kinetic ene

Last Answer : A charged particle is rotating in uniform circular motion in a uniform magnetic field . Let r ... angular speed. then match the following two columns.

Description : A proton moves in a uniform magnetic field in a circular path of radius R. If the energy of proton is doubled then the new radius becomes a) R √2 b) 2R c) R 2 d) √2 R

Last Answer : d) √2 R

Description : A charged particle of mass `m` and charge `q` travels on a circular path of radius `r` that is perpendicular to a magnetic field `B`. The time takeen

Last Answer : A charged particle of mass `m` and charge `q` travels on a circular path of radius `r` that is perpendicular to a ... (2pi qB)/(m)` D. `(2pi m)/(qB)`

Description : Assertion A charged particle is rotating in a circular path in uniform magnetic field. Then, plane of circle is perpendicular to the magnetic field. R

Last Answer : Assertion A charged particle is rotating in a circular path in uniform magnetic field. Then, plane of ... . If Assertion is false but Reason is true.

Description : An electron is travelling at right angles to a uniform magnetic field of flux density 1.2 mT with a speed of 8 × 106 m s-1, the radius of circular path followed by electron is A. 3.8 cm B. 3.7 cm C. 3.6 cm D. 3.5 cm

Last Answer : 3.8 cm

Description : A current `-` carrying circular loop of radius `R` is placed in the `XY-` plane with centre at the origin. Half of the loop with `xgt0` is now bent so

Last Answer : A current `-` carrying circular loop of radius `R` is placed in the `XY-` plane with centre at the origin. ... B at (0,0,z), z gt gt R is unchanged

Description : In the figure shown a uniform conducing rod of mass m and length l is suspended invertical plane by two conducing springs of spring constant k each. U

Last Answer : In the figure shown a uniform conducing rod of mass m and length l is suspended invertical plane by two ... mean position of rod D. None of the above

Description : In the figure shown a uniform conducing rod of mass m and length l is suspended invertical plane by two conducing springs of spring constant k each. U

Last Answer : In the figure shown a uniform conducing rod of mass m and length l is suspended invertical plane by two conducing ... ^(2)C)/(K))` D. None of these

Description : Assertion A flexeble wire loop of irregular shape carrying current when placed in a uniform external magnetic field acquires a circular shape. Reason

Last Answer : Assertion A flexeble wire loop of irregular shape carrying current when placed in a uniform external ... circular shape is having the greatert area.

Description : Due to the flow of current in a circular loop of radius `R`, the magnetic induction produced at the centre of the loop is `B`. The magnetic moment of

Last Answer : Due to the flow of current in a circular loop of radius `R`, the magnetic induction produced at the centre of the ... )` D. `(2pi BR^(2))/(mu_(0))`

Description : A uniform thin rod of mass `m` and length `R` is placed normally on surface of earth as shown. The mass of earth is `M` and its radius `R`. Then the m

Last Answer : A uniform thin rod of mass `m` and length `R` is placed normally on surface of earth as shown. The mass of earth ... 2GMm)/R^(2)` D. `(4 GMm)/R^(2)`

Description : A conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field with its plane perpendicular to the field. An emf is

Last Answer : A conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field ... . the loop is deformed from the original shape

Description : A circular loop which is in the form of a major arc of a constant magnetic field B is applied in the vertical direction such that the magnetic lines o

Last Answer : A circular loop which is in the form of a major arc of a constant magnetic field B is applied in the ... `2 BIR sin(alpha//2)` D. None of these

Description : An electron is moving on a circular path of radius `r` with speed `v` in a transverse magnetic field B. e/m for it will be

Last Answer : An electron is moving on a circular path of radius `r` with speed `v` in a transverse magnetic field B. e/m for it ... /Br` B. `B/rv` C. Brv D. `vr/B`

Description : A particle of charge `q` and mass `m` moves in a circular orbit of radius `r` with angular speed `omega`. The ratio of the magnitude of its magnetic m

Last Answer : A particle of charge `q` and mass `m` moves in a circular orbit of radius `r` with angular speed `omega`. The ... C. `q` and `m` D. `omega` and `m`

Description : A charged particle of mass m and charge q describes circular motion of radius r in a unifrom magnetic fiels of strenght b the frequency of revolution

Last Answer : A charged particle of mass m and charge q describes circular motion of radius r in a unifrom magnetic fiels of ... (2pim)/(Bq)` D. `(Bq)/(2piq)`

Description : A wire loop is moved parallel to a uniform magnetic field. The induced emf in the loop: a. depends on the shape b. depends on area c. depends on nature of loop d. zero

Last Answer : d. zero

Description : A proton of mass m and charge q is moving in a plane with kinetic energy E. if there exists a uniform magnetic field B, perpendicular to the plane mot

Last Answer : A proton of mass m and charge q is moving in a plane with kinetic energy E. if there exists a uniform magnetic ... Em))/(2qB)` D. `(sqrt(2Eq))/(qB)`

Description : An electron moves in a circular orbit with a uniform speed `v`.It produces a magnetic field `B` at the centre of the circle. The radius of the circle

Last Answer : An electron moves in a circular orbit with a uniform speed `v`.It produces a magnetic field `B` at the centre of the ... (v)/(B))` D. `sqrt((B)/(v))`

Description : A circular coil of `20turns` and radius `10cm` carries a current of `5A`. It is placed in a uniform magnetic field of `0*10T`. Find the torque acting

Last Answer : A circular coil of `20turns` and radius `10cm` carries a current of `5A`. It is placed in a uniform magnetic ... Nm B. 3.14 Nm C. 0.314 Nm D. zero

Description : A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the magnetic induction will be `(1//8)^(th

Last Answer : A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the ... 2//sqrt(3))R` D. `R//2sqrt(3)`

Description : The electric field lies in a plane parallel to the earth’s surface. A. Elliptical polarization B. Horizontal polarization C. Vertical polarization D. Circular polarization

Last Answer : B. Horizontal polarization

Description : A lamp is hanging along the axis of a circular table of radius r. at what height should the lamp be placed above the table so that the intensity of il

Last Answer : A lamp is hanging along the axis of a circular table of radius r. at what height should the lamp be placed ... is `(1)/(8)` of that at its centre ?

Description : A current l flows through a closed loop as shown in figure .The magnetic field at the centre O is

Last Answer : A current l flows through a closed loop as shown in figure .The magnetic field at the centre O is A. ... )l)/(2piR)(theta+sintheta)` D. None of these

Description : Magnetic field due to a ring having n turns at a distance `x` on its axis is proportional to (if `r =` radius of ring)

Last Answer : Magnetic field due to a ring having n turns at a distance `x` on its axis is proportional to (if `r =` radius of ring) ... 2))/((x^(2)+r^(2))^(3//2))`

Description : Assertion Net torque in the current carrying loop placed in a uniform magnetic field (pointing inwards) is zero. Reasonl Magnetic moment (M) is inward

Last Answer : Assertion Net torque in the current carrying loop placed in a uniform magnetic field (pointing inwards) ... . Reasonl Magnetic moment (M) is inwards.

Description : Work done by a body of mass 100 kg moving along a circular path of radius 2 m with a uniform velocity of 10 m/sec is a.5000 J b.2500 J c.509.68 J d.None of the above e.Tapered bearing

Last Answer : d. None of the above

Description : iv) A rectangular coil free to rotate is placed in uniform magnetic field with its plane parallel to the magnetic lines of force. Then the coil willa) rotate to maximize the magnetic flux through ... since the magnetic flux through its plane is zero.d) experience the constant torque equal to NBIA

Last Answer : iv) A rectangular coil free to rotate is placed in uniform magnetic field with its plane parallel ... d) experience the constant torque equal to NBIA

Description : A wires PQRS carrying a current I runs along three edges of a cube of side l as shown in figure. There exists a uniform magnetic field of magnitude B

Last Answer : A wires PQRS carrying a current I runs along three edges of a cube of side l as shown in figure. There exists ... sqrt(3)IB` C. `sqrt(2I) lB` D. 2Ilb

Description : In the figure shown, a conducting wire PQ of length l=1m, is moved in a uniform magnetic field B=4T with constant velocity v=2m/s towards right. Given

Last Answer : In the figure shown, a conducting wire PQ of length l=1m, is moved in a uniform magnetic field B=4T with ... P_(2) = 32 J//s` D. None of these

Description : In the figure shown, a conducting wire PQ of length l=1m, is moved in a uniform magnetic field B=4T with constant velocity v=2m/s towards right. Given

Last Answer : In the figure shown, a conducting wire PQ of length l=1m, is moved in a uniform magnetic field B=4T with constant ... `16 N` C. `24 N` D. `32 N`

Description : In the figure shown, a conducting wire PQ of length l=1m, is moved in a uniform magnetic field B=4T with constant velocity v=2m/s towards right. Given

Last Answer : In the figure shown, a conducting wire PQ of length l=1m, is moved in a uniform magnetic field B=4T with constant ... `0` B. `2A` C. `4A` D. `6A`

Description : Figure shows three cases: in all case the circular part has radius r and straight ones are infinitely long. For the same current the ratio of field B

Last Answer : Figure shows three cases: in all case the circular part has radius r and straight ones are infinitely long. For the same ... /(4)):((3pi)/(4)+(1)/(2))

Description : There is a ring of radius r having linear charge density `lambda` and rotating with a uniform angular velocity `omega.` the magnetic field produced by

Last Answer : There is a ring of radius r having linear charge density `lambda` and rotating with a uniform angular velocity ` ... D. `(mu_(0)lambda)/(2omega^(2))`

Description : A mode where the entire magnetic field is in the transverse plane and has no portion parallel to the length axis.

Last Answer : TM mode

Description : An electron moving in a circular orbit of radius `r` makes `n` rotation per secound. The magnetic field produced at the centre has magnitude

Last Answer : An electron moving in a circular orbit of radius `r` makes `n` rotation per secound. The magnetic field produced at ... (r)` D. `(mu_(0)"ne")/(2r)`

Description : The magnetic field at the centre of a circular coil of radius `r` carrying current `l` is `B_(1)`. The field at the centre of another coil of radius `

Last Answer : The magnetic field at the centre of a circular coil of radius `r` carrying current `l` is `B_(1)`. The field at the ... `1//2` B. `1` C. `2` D. `4`

Description : Find the current density on the conductor surface when a magnetic field H = 3cos x i + zcos x j A/m, for z>0 and zero, otherwise is applied to a perfectly conducting surface in xy plane. a) cos x i b) –cos x i c) cos x j d) –cos x j

Last Answer : b) –cos x i

Description : An α particle moves perpendicular to a constant magnetic field of strength 1.2 T in a circular path of radius 0.7 m. The speed of α particle in ms-1 is ______________ a) 2.7 × 107 b) 2.6 × 107 c) 3.2 × 107 d) 2.0 × 107

Last Answer : a) 2.7 × 107