A 500-W device is connected to a 120-V ac power source. What peak current flows through this device?
A)
4.2 A
B)
5.9 A
C)
120 A
D)
150 A
E)
170 A
B
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A flat circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are at an angle of 30°
A) 0 T ? m2 B) 3.1 × 10-3 T ? m2 C) 5.5 × 10-3 T ? m2 D) 6.3 × 10-3 T ? m2
How do we specify the location of a star in the night sky?
A parallel plate capacitor with an air dielectric is attached to a voltage source and charged. The voltage source is removed, and then the plates are separated to double their previous distance. What happens to the energy stored by the capacitor when the plates are separated?
A. it doubles B. it quadruples C. it halves D. it is diminished by a factor of 4 E. it stays the same
Seismic waves that travel through Earth are called ______________ waves
Fill in the blank(s) with correct word