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سؤال وجواب في الكهربية Electricity
Question 1 Question: What is the SI unit of charge Answer: The SI unit of charge is coulomb. Question 2 Question: How many electrons constitute a charge equal to 1 C Answer: 1 Coulomb of charge has 6.25 x 10^18 electrons. Question 3 Question: State ohm's law. Answer: When temperature and other physical parameters remain constant, the current flowing through a conductor is directly proportional to the potential difference across its ends. Question 4 Question: Which effect of current is used in the following appliance? a) electric bulb b) immersion rod c) electric iron d) galvanometer Answer: For electric bulb, immersion rod and electric iron, heating effect of current is used. For galvanometer magnetic effect of current is used. Question 5 Question: Define watt and watt hour. Answer: Watt is the unit of power. If 1 joule of energy is consumed in 1 second, we say the power of the device is 1 watt. Watt hour is the unit of energy. If a device with a power 1 watt works for 1 hour 1 watt hour amount of energy is consumed. Question 6 Question: Which of the following graphs depict ohm's law. Answer: Graph (a) represents ohm's law since a straight line which shows that 'I' is directly proportional to 'V' (i.e., ohm's law). Question 7 Question: On what factor's does the heating effect of current depend on. Answer: The heating effect of current depends on The square of the amount of current flowing The resistance of the wire and The time of flow of current Question 8 Question: Name the instrument that measures the potential difference across the ends of a current carrying conductor. How is the instrument connected to the circuit? Answer: Voltmeter measures the potential difference across the ends of a conductor. It is connected in parallel across the element through which current flows due to a certain potential difference. Question 9 Question: When are several resistors in a circuit said to be connected in parallel? Answer: Several resistors are said to be connected in parallel when the potential difference across the resistors remain the same. ساعد في نشر والارتقاء بنا عبر مشاركة رأيك في الفيس بوك المصدر: منتدى لغة الروح السيرة الذاتية لي هنا
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مواقع النشر (المفضلة) |
الكلمات الدلالية (Tags) |
الكهربية, electricity, سؤال, وجواب |
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