Three insulated wires in a cable

Five very long, straight insulated wires are closely bound together to form a small cable. Currents carried by the wires are: I_1=20A, I_2=-6A, I_3=12A, I_4=-7A, I_5=18A . (Negative currents are opposite in direction to the positve.) The magnetic field induction at a distance of 10cm from the cable is (current enters at A and leaves at B and C as shown)

Assertion: The bending of an insulated wire increase the resistance of wire Reason : The drift velocity of electron in this wire decreases

How does the colour code of wires in a cable help in house wiring ?

You are given a U shaped soft iron piece, insulated copper wire and a battery. Draw a circuit diagram to make a horse shoe electromagnet.

In an electrical cable there is a single wire of radius 9 mm of copper. Its resistance is 5 Omega . The cable is replaced by 6 different insulated copper, wires the radius of each wire is 3 mm . Now the total resistance of the cable will be

Three elastic wires PQ, PR and PS support a body P of mass M , as shown in figure. The wires are of the some material and cross sectional area, the middle one being vertical. Find the loads by each wire.

Fig. below shows two bulbs with switches and fuse connected to the mains through a three pin socket by means of a three wires cable. Name and state the colour of insulation of each wire 1, 2 and 3.

An elevator weighing 6000 kg is pulled upward by a cable with an acceleration of 5ms^(-2) . Taking g to be 10 ms^(-2) , then the tension in the cable is