Related InterviewSolutions

• 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 along one of the sides of cube. The magnitude of the force acting on the wire is A. zeroB. `sqrt(3)IB`C. `sqrt(2I) lB`D. 2Ilb
• Three long straight wires `A`, `B` and `C` are carrying current as shown in figure. Then the resultant force on `B` is directed A. towards AB. towards CC. perpendicular to the plane of paper and outwardD. Perpendicular to the plane of paper and inward
• Assertion Two infinitely long wires `A` and `B` carry unequal currents both in inward direction. Then, there is only point (excluding the ponts at infinity), where net magnetic field is zero. Reason That point liews between points `A` abnd `B`.A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.B. If both Assertion and Reason are true but Reason is not correct explanation of Assertion.C. If Assertion is true but Reason is false.D. If Assertion is false but Reason is true.
• A wire of length `L metre ` , carrying a current `I `ampere is bent in the form of a circle . The magnitude of its magnetic moment is …………. ` MKS units ` .A. `(L^(2)I^(2))/(4pi)`B. `(LI)/(4pi)`C. `(L^(2)I)/(4pi)`D. `(LI)/(4pi)`
• Figure shows, three long straight wires parallel and equally speed with identical currents. Then, the force acting on each wire due to the other is A. `F_(a) gt F_(b) gt F_(c)`B. `F_(b) gt F_(c) gt F_(a)`C. `F_(c) gt F_(a) gt F_(b)`D. `F_(b) gt F_(a) gt F_(c)`
• Two infinitely long, thin, insulated, straight wires lie in the x-y plane along the x- and y- axis respectively. Each wire carries a current I, respectively in the positive x-direction and positive y-direction. The magnetic field will be zero at all points on the straight line:A. y = xB. y = -xC. y = x-1D. y = -x+1
• Two straight wires each 10 cm long are parallel to one another and separated by 2 cm. when the current flowing in them is 30 A and 40 A respectively then the force experienced by either of the wires isA. `1.2xx10^(-3)N`B. `12xx10^(-3)N`C. `11.2xx10^(-3)N`D. `10.2x10^(-3)N`
• A long wire carries a steady curent . It is bent into a circle of one turn and the magnetic field at the centre of the coil is `B`. It is then bent into a circular loop of `n` turns. The magnetic field at the centre of the coil will beA. nBB. `n^(2)B`C. `2nB`D. `2n^(2)B`
• 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 induction at the centre of loop is A. `(mu_(0)2I)/(4piR)(pi + 1)`B. `(mu_(0)2I)/(4piR)(pi - 1)`C. `(mu_(0)I)/(8piR)(pi + 1)`D. zero
• Assertion three infinitely long current carrying wires have equal currents and they are equally spaced. The magnitude of magnetic force on all three is same. Reason Net force on wire-2 is zero.