An object moving on a circle at constant speed is an example of accelerated motion.
Answer the following statement true (T) or false (F)
True
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When writing in the inverted pyramid style, the first paragraph should include the "who, what, when, where, and why" of the topic.
Answer the following statement true (T) or false (F)
Charge of uniform density 50 nC/m3 is distributed throughout the inside of a long nonconducting cylindrical rod (radius = 5.0 cm). Determine the magnitude of the potential difference of point A (2.0 cm from the axis of the rod) and point B (4.0 cm from the axis).
A. 2.7 V B. 2.0 V C. 2.4 V D. 1.7 V E. 3.4 V
A resistor is connected to an ideal ac power supply
(a) The phase angle between the current and voltage is A) 0 B) ?/2 radians. C) -?/2 radians. D) ? radians. E) 3?/4 radians. (b) The current in the resistor A) leads the voltage across the resistor by 90°. B) lags the voltage across the resistor by 90°. C) is in phase with the voltage across the resistor. D) the voltage across the resistor by 45°. E) lags the voltage across the resistor by 45°. (c) How does the average power dissipated in the resistor change as the frequency in the ac power supply decreases? A) It decreases. B) It increases. C) It does not change. D) It increases or decreases depending on the sign of the phase angle.
An LRC circuit has R = 15.0 ?, L = 25.0 mH, and C = 30.0 ?F. The circuit is connected to a 120 V (rms) source with frequency 200 Hz
(a) What is the impedance of the circuit? (b) What is the rms current in the circuit? (c) What is the rms voltage across the resistor? (d) What is the rms voltage across the inductor? (e) What is the rms voltage across the capacitor? (f) If the current in the circuit is given by I = I0 sin ?t, the voltage is given by