buth Rana MCC PHY 124 TEST 2 DO FIVE PROBLEMS SHOW ALL WORK, JUST ANSWERS NOT AC
ID: 1732038 • Letter: B
Question
buth Rana MCC PHY 124 TEST 2 DO FIVE PROBLEMS SHOW ALL WORK, JUST ANSWERS NOT ACCEPTABLE 1. Find the induced emf, when the eurrent in a 48.0 mH inductor increases from o to 535 mA in 2. An ac penerator with an rms voltage 130 V is connected in series with a 35 ohres resistor and 11 micro Farad capacitor, the rms current in the circuit is 1.2 A. What are la) the impedance (b) capacitive reactance of the circult (c) what is the frequency of the generator 3, A person 1.8m tall stands 0.86m from a reflecting globe(a) if the diameter of globe is 18 cm, where s the image of the person (b) How lange is the image of the person. 4, The barrel of a compound microscope is 15 cm long. The specimen in mounted 1.0 cm from the objective, the eye-piece has focal length of 5.0 cm. What is the focal length of the objective lens. 5, A metal rod 0.95 m long moves with a speed of 2.4 m/s normal to the magnetic field, if the induced emf between the ends of the rod is 0.65 V, what is the strength of the magnetic field 6, The capacitive reactance of a capacitor at 60.0 Ht is 105 Ohms. At what frequency its capacitive reactance is 72.5 OhmsExplanation / Answer
Q1.
The emf is directly proportional to the rate of change of the current.
EMF = -L * (? I ÷ ?t)
L = 48 mH = 0.048 H
? I = 535 mA = 0.535 amp
?t = 15.5 ms = 0.0155 seconds
EMF = -0.048 * (0.535/0.0155)
= -1.66 V
The negative sign indicates that the polarity of the voltage is opposite the polarity of the current
Pls post other questions separately.
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