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Physics Solutions Library

Access over 6,133 Physics video and text solutions to help you complete your homework.

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6,133 solutions

What is an Electromagnetic Wave?

Q. Two electromagnetic waves are travelling at the same speed. The wave with the higher wavelengthA) has a lower frequency than the other wave.B) has ...

Solved • Jan 10, 2017

Energy Carried by Electromagnetic Waves

Q. A large electromagnet has a 22 T magnetic field between its poles. What is the magnetic energy density between the poles? A) 240 J/cm3 B) 30,000 ...

Solved • Jan 10, 2017

Force and Torque on Current Loops

Q. A square wire 2.0 cm on each side is oriented so that a 5.00 mT magnetic field makes a 30.0° angle with the normal to the plane of the square. If a...

Solved • Jan 10, 2017

Power in Circuits

Q. The resistivity of gold is 2.44 x 10 -8 Ω•m at a temperature of 20°C. A gold wire, 1.4 mm in diameter and 17 cm long, carries a current of 190 ma. ...

Solved • Jan 10, 2017

Combining Resistors in Series & Parallel

Q. In the figure, consider the circuit sketched. The battery has emf ε = 80 volts and negligible internal resistance. The four resistors have resistan...

Solved • Jan 10, 2017

Magnetic Field Produced by Straight Currents

Q. In the figure, the two long straight wires are separated by a distance of d = 0.40 m. The currents are I1 = 1.0 A to the right in the upper wire an...

Solved • Jan 10, 2017

Power in Circuits

Q. The resistivity of gold is 2.44 x 10 -8 Ω•m at a temperature of 20°C. A gold wire, 1.8 mm in diameter and 14 cm long, carries a current of 480 ma. ...

Solved • Jan 10, 2017