Which of the following electromagnets will have the weaker force assuming the number of coils around the core is the same?
a wire with a 1.00 A current
a wire with a 2.00 A current
a wire with a 0.50 A current
a wire with a 1.50 A current
A current-carrying wire carries a current of 2.53 A. What is the magnitude of the magnetic field at point P, 0.0034 meters away from the wire?
1.49 x 10-5 T
2.69 x 10-10 T
1.49 x 10-4 T
2.69 x 10-9 T You heat up a piece of metal and bring it close to a strong magnet. You let the piece of metal cool while in place. What happens?
The induced magnet will stay a magnet after it cools.
The magnetic ability of the original strong magnet will be reduced by the presence of the non-magnetic material.
Nothing happens in this case, because there was no contact between the metal and strong magnet.
After the induced magnet is moved away from the strong magnet, it will return to its non-magnetic form. Which of the following experiments was the first to show the wave-particle duality of light?
Modern Double-Slit Experiment
Young’s Double-Slit Experiment
Maxwell’s Electromagnetic Induction
Einstein’s Photoelectric Effect Which of the following would step-down the voltage that comes in to a transformer? Select all that apply.
the primary coil has less turns that the primary coil
the primary coil has more turns than the secondary coil
the primary coil and the second coil have the same number of turns
The frequency of orange light is 5.01 x 1014 Hz. How much energy does a photon of orange light carry? (h = 6.626 x 10-34 J·s; 1 eV = 1.60 x 10-19 J)
7.56 eV
2.07 eV
3.32 eV
5.43 eV
