MPSC Rajyaseva 2022 GS Paper 1 — Question 37
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110 ओहम रोध असलेल्या उपकरणाच्या दोन टोकांमध्ये 33 V विभवांतर प्रयुक्त केले असता उपकरणातून काही विद्युतधारा वाहते. 500 ओहम रोध असणाऱ्या उपकरणातून तेवढीच विद्युत धारा वाहू देण्यासाठी त्याच्या दोन टोकांमध्ये किती विभवांतर प्रयुक्त करावे लागेल? When a potential difference of 33 V is applied to a device whose resistance is 110 $\Omega$, some current flows through it. If the same current is to be passed through a device whose resistance is 500 $\Omega$, then how much potential difference is to be applied?
1)726 V
2)455 V
3)1500 V
4)150 V✓ Correct
According to Ohm's law, current remains constant. First find current I = V1 / R1 = 33 / 110 = 0.3 A. Then find new voltage V2 = I * R2 = 0.3 * 500 = 150 V.