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qUESTIONS

MCQs-PYQs-12th-jee

Three long straight wires A, B and C are carrying currents as shown in figure. Then the resultant force on B is directed :

MCQs-PYQs-12th-jee

A , B and C are parallel conductors of equal length carrying currents I , I and 2 I respectively. Distance between A 𝐴 and B 𝐵 is x . Distance between B and C is also x . F 1 is the force exerted by B on A and F2 is the force exerted by B on C choose the correct answer

MCQs-PYQs-12th-jee

Three coplanar, parallel, long straight wires are equally spaced, that is, the distance between each pair of successive wires is the same. the first and the third wire carry currents of 1 a each, in the same direction. what must be the current in the second wire (wire in the middle), so that the other two wires do not feel any net force?

MCQs-PYQs-12th-jee

Three long straight wires are connected parallel to each other across a battery of negligible internal resistance. The ratio of their resistances are 3 : 4 : 5. What is the ratio of distances of middle wire from the others if the net force experienced by it is zero

MCQs-PYQs-12th-jee

Two infinitely long parallel wires carry currents of magnitude I1 and I2 and are at a distance 4 cm apart. The magnitude of the net magnetic field is found to reach a non-zero minimum values between the two wires and 1 cm away from the first wire. The ratio of the two currents and their mutual direction is

MCQs-PYQs-12th-jee

In the circuit of adjoining figure the current through 12 Ω register will be 

12th-jee

Twelve wires of equal length and same cross-section are connected in the form of a cube. If the resistance of each of the wires is R, then the effective resistance between the two diagonal ends would be

12th-jee

In the circuit shown below E1 = 4.0 V, R₁= 2 Ω, E2 = 6.0 V, R2 = 4 Ω and R3 = 2 Ω. The current I1 is

12th-jee

In the circuit element given here, if the potential at point B, VB = 0, then the potentials of A and D are given as

MCQs-PYQs-12th-jee

A current carrying straight wire is kept along the axis of a circular loop carrying a current. The straight wire

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