As shown in the figure, a wire and a 10-? resistor are used to form a circuit in the shape of a square, 20 cm by 20 cm
A uniform but nonsteady magnetic field is directed into the plane of the circuit. The magnitude of the magnetic field is decreased from 1.50 T to 0.50 T in a time interval of 63 ms. The average induced current and its direction through the resistor, in this time interval, are closest to
A) 63 mA, from b to a.
B) 38 mA, from b to a.
C) 63 mA, from a to b.
D) 38 mA, from a to b.
E) 95 mA, from a to b.
A
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The diagram above represents energy levels in a hydrogen atom. Each level is labeled with its energy (above the ground state of Level 1) in units of electron/volts (eV). The labeled transitions represent an electron moving between energy levels. Which transition represents an electron that absorbs a photon with 10.2 eV of energy?
A) A B) B C) C D) D E) E
If the diameter of a wire increases, its resistance __________
Fill in the blank(s) with correct word
Which of the following are the units of a henry and a farad respectively?
a. J × s2/C2 and C2/J b. V × s/A and V/C c. V/(A × s) and C/V d. N × m/A2 and 1/J e. None of the above
Does sound travel faster in a warm room or a cold room? Explain your answer.