Electromagnetic-theory Questions Set 15:
In a step-down transformer, which quantity is increased?
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Which of the following formulas perfectly describes the Directivity of an Antenna?
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A wave has a resistance of 12.5 Ω in a 48 Ω transmission line. Find the attenuation coefficient of the wave.
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Find the torque on a conductor with a current of 2A, a flux density of 50 units, a length of 15 cm, and a distance of 8 m.
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Which motor type has the poorest speed control?
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Calculate the power per unit velocity of a wave with electric field of 16 units and density of 20.5 units.
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A transmission line has a voltage of 18 V and a conduction current of 1.2 A. Calculate the receiving impedance of the transmission line.
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To produce a magnetic field of 3.14 Tesla at the center of a circular loop with a diameter of 1 meter, the current flowing through the loop is
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The energy stored in the magnetic field of a solenoid 30 cm long and 3 cm in diameter, wound with 1000 turns of wire carrying a current of 10 amperes, is
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In an ideal parallel LC-circuit, the capacitor is charged by connecting it to a DC source, which is then disconnected. The current in the circuit:
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