AP Police SI practice question
Two resistances of 20 Ω each are connected in parallel. This combination is then connected in series with a third resistance of 20 Ω and a 3 V battery. The power supplied by the battery will be _______.
From a AP Police SI Science practice set · Science
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Correct answer: (D) 0.30 W
Two 20 ohm resistors in parallel give 10 ohm; adding the third 20 ohm resistor in series gives a total of 30 ohm. Current = 3/30 = 0.1 A, so power supplied = VxI = 3x0.1 = 0.30 W.
हिंदी में प्रश्न
घरेलू विद्युत परिपथ में, फ्यूज ( FUSE) का मुख्य उद्दे श्य क्या है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) ओवरलोडिंग रोकना और उपकरणों की सुरक्षा करना
दो 20 ओम प्रतिरोधकों को समांतर जोड़ने पर 10 ओम मिलता है; इसके साथ श्रेणीक्रम में तीसरा 20 ओम जोड़ने पर कुल प्रतिरोध 30 ओम होगा। धारा = 3/30 = 0.1 A, अतः आपूर्त शक्ति = VxI = 3x0.1 = 0.30 W होगी।
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