A series ac circuit has a resistance of 2.0 k?, a capacitance of 8.0 ?F, and an inductance of 9.0 H. If the frequency of the alternating current is 4.0/? kHz, by what angle does the voltage lead the current?
A) -3.1 rad B) +36 rad C) +1.5 rad D) +3.1 rad E) -1.8 rad
C
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What is the speed of light in a material that has an index of refraction of 2.0?
A. 
B. 
C. 
D. 
E. No such index can exist.
If the ac peak current through a 100 ohm resistor is 1.7 A, the peak voltage across this resistor is
A) 289 V. B) 110 V. C) 170 V. D) 210 V. E) 120 V.
Consider 2 LRC circuits at critical damping. In which circuit does the initial charge on the capacitor decrease to 10% of its value the fastest?
A) in the circuit with the smallest initial charge on the capacitor B) in the circuit with the largest resistance C) in the circuit with the largest LC product D) in the circuit with the smallest LC product E) in the circuit with the largest initial charge on the capacitor
An _________in crystallinity in a polymer increases the yield strength.
Fill in the blank(s) with the appropriate word(s).