Chapter 3. Current Electricity …
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1. The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4Ω, what is the maximum current that can be drawn from the battery? (A) 30 A (B) 40 A …
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The torque-speed characteristic curve is one of the most important performance indicators of a three-phase induction motor. It shows how the motor’s developed torque varies with rotor speed, from standstill to synchronous speed, and helps engineers understand starting performance, running …
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Q. A circle with the equation \( (x – h)^2 + (y – k)^2 = r^2 \) is shifted 3 units to the right and 2 units down. What is the new equation of the circle? Solution: The original center …
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The Biot–Savart Law is a fundamental relation in electromagnetism that explains how a current-carrying conductor produces a magnetic field. It is analogous to Coulomb’s Law, but instead of charges, it deals with moving charges (current). When current flows through a …
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1. The dimensions of \( \frac{1}{2} \varepsilon_0 E^2 \) is (1) \( MLT^{-2} \) (2) \( ML^{-1}T^{-2} \) (3) \( MLT^{-1} \) (4) \( ML^{-1}T^{-1} \) Answer: (2) Explanation: The expression \( u_e = \frac{1}{2} \varepsilon_0 E^2 \) represents electric …
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