The output from a NAND gate having inputs A and B given below will be

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Solution:                
The output from a NAND gate having inputs A and B given below will be

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The magnetic field at the centre of a wire loop formed by two semi circular wires of radii R1 = 2 πm and R2 = 4π m carrying current I = 4A as per figure  given below is  a × 10^–7 T. The value of a is  ______. (Centre O is common for all segments)           

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