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Lesson_4.4_Homework

# Lesson_4.4_Homework - Lesson 4.4 Homework 1 A 500-turn coil...

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Lesson 4.4 Homework 1. A 500-turn coil has an area of 5.5 cm 2. If it is rotated in a uniform magnetic field of ).8 T, (i) what frequency of rotation will generate an emf of 10 V in the coil? (ii) If the coil rotates at 60 Hz, what is the induced emf? 2. A 700-turns rectangular coil of area 3 cm 2 rotates in a magnetic field of 9000 G. (i) What is the maximum emf generated when the coil rotates 60 times a second? (ii) What must be the frequency of rotation to generate a maximum emf of 120 V? 3. A 60-W light bulb is plugged into 110-V supply. Find (i) I rms , (ii) I max and (iii) the maximum power dissipated in the bulb. 4. A 60-Hz generator producing a maximum emf of 12.0 V is connected across a 3.0- resistor. (i) What is the angular frequency ϖ of the current? (ii) Find I max and I rms in the resistor. (iii) find P max and P ave dissipated in the resistor. 6. What is the reactance of 1.0-mH inductor at a frequency of (i) 60 Hz, (ii) 6 kHz? 7.

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Lesson_4.4_Homework - Lesson 4.4 Homework 1 A 500-turn coil...

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