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{"ops":[{"insert":"A single current-carrying circular loop of radius\u00a0"},{"attributes":{"italic":true},"insert":"R"},{"insert":"=3.2"},{"attributes":{"italic":true},"insert":"cm"},{"insert":"\u00a0is placed next to a long straight wire as shown in Figure. A current\u00a0"},{"attributes":{"italic":true},"insert":"i"},{"insert":"1=\u22124.3"},{"attributes":{"italic":true},"insert":"A"},{"insert":"\u00a0is passing through the wire towards right. At a certain moment an electron is moving at a velocity,\u00a0"},{"attributes":{"italic":true},"insert":"v"},{"insert":"\u00a0=440.0"},{"attributes":{"italic":true},"insert":"j m"},{"insert":"\/"},{"attributes":{"italic":true},"insert":"s"},{"insert":"\u00a0toward the centre of the circular wire. At the instant shown in figure, the electron\u2019s distance from the wire is\u00a0"},{"attributes":{"italic":true},"insert":"d"},{"insert":"=5.5"},{"attributes":{"italic":true},"insert":"cm"},{"insert":". The distance between the circular loop and the wire is R\/2. \n\na)\u00a0Compute the magnitude of the magnetic field at the centre\u00a0"},{"attributes":{"italic":true},"insert":"c"},{"insert":"\u00a0due to the current passing through the straight wire\n\nb)\u00a0What is the magnitude of magnetic field at the centre\u00a0"},{"attributes":{"italic":true},"insert":"c "},{"insert":"due to the motion of the electron\n\nc)\u00a0In unit vector notation, find the magnetic force on the electron due to the current passing through the straight wire\n\nd)\u00a0Calculate the magnitude and direction of the current to the circular wire to produce zero magnetic field at its centre c. Consider counter-clockwise circulation of current as positive\n"}]}

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