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Answer in Detail...... Physics Experts can only solve |
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Answer» Answer: VT = 1250V ; R1 = 250Ω Explanation: Vt & R1 fixed resultant RESISTANCE R' = R1 + R2 when R2 = 1kΩ & I = 1MA R' = R1 + 1000 & I = 1/1000 but. .. Vt / R' = I (ohm's LAW) hence. .. Vt / ( R1+1000) = 1/1000 Vt = (R1+1000)/1000........(1) again when.... R2 = 0Ω & I = 5mA R' = R1 + 0 = R1 & I = 5/1000 hence.... Vt / ( R1) = 5/1000 Vt = 5R1/1000..............(2) from (1) & (2) R1 = 250Ω & Vt = 1250V |
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