Two resistors of values 6.0 and 12.0 W are connected in parallel. This combination in turn is hooked in series with a 4.0-W resistor and a 24-V battery. What is the current in the battery?
a. 12 A
c. 2.0 A
b. 3.0 A
d. 6.0 A
B
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A series RLC circuit has a 150-? resistor, a 6.00-mH inductor and a 0.200-?F capacitor connected across a 120-V rms ac source at 15.0 kHz. What is the phase angle of the circuit?
A) 47.3° B) 0° C) 45.0° D) 90.0° E) 73.7°
The ______________ interaction alone can change one type of quark into another
Fill in the blank(s) with correct word
Determine the potential difference Va ? Vb shown in the circuit below
a.
?5.0 V
b.
+5.0 V
c.
?10 V
d.
+10 V
e.
0 V
Nonreflective coatings for camera lenses reduce the loss of light at various surfaces of multi-lens systems, as well as preventing internal reflections that might mar the image. Find the minimum thickness of a layer of magnesium fluoride (n = 1.38) on flint glass (n = 1.66) that will cause destructive interference of reflected light of wavelength ? = 550 nm, a wavelength which is near the middle of the visual spectrum.
What will be an ideal response?