Assume that an ohmic light bulb’s brightness is directly proportional to the power it dissipates. If we replace the battery in our simple circuit with one with twice the characteristic potential difference, the bulb’s brightness
A. remains the same.
B. increases by a factor of 2.
C. increases by a factor of 4.
C. increases by a factor of 4.
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For an RLC ac circuit, the rms current is 10 A. If the impedance is 12 k? when the voltage leads the current by 39°, find the average power of the circuit
A) 47 kW B) 93 kW C) 190 kW D) 930 kW
A curved mirror that produces an enlarged image will also have a greater field of view than a plane mirror
a. True b. False Indicate whether the statement is true or false
What is the radius of curvature of the path of a 3.0-keV proton in a perpendicular magnetic field of magnitude 0.80 T?
a. 9.9 mm b. 1.1 cm c. 1.3 cm d. 1.4 cm e. 7.6 mm
One parsec is defined as the distance to a star when the star exhibits a parallax of what angle of arc?
a. One degree b. One second c. One millimeter d. One minute