Power: A flashlight draws 0.133 A from a 3.0-V battery pack. In 2.0 minutes (a) how much charge flows from the battery, (b) how much energy does the battery supply, and (c) how many electrons have passed any point in the circuit every second?
What will be an ideal response?
(a) 16 C (b) 48 J (c) 8.3 × 1017
You might also like to view...
Electric Field Lines: Two stationary point charges q1 and q2 are shown in the figure along with a sketch of some field lines representing the electric field produced by them. What can you deduce from the sketch?
A. q1 is negative and q2 is positive; the magnitudes are equal. B. q1 and q2 have the same sign; the magnitudes are equal. C. q1 is positive and q2 is negative; the magnitude of q1 is greater than the magnitude of q2. D. q1 is negative and q2 is positive; the magnitude of q1 is less than the magnitude of q2. E. q1 and q2 have the same sign; the magnitude of q1 is greater than the magnitude of q2.
Monochromatic light from a He-Ne laser (? = 632.8 nm) is incident on a diffraction grating containing 5000 lines/cm. Determine the angle of the first-order maximum.
A. 18.4° B. 39.2° C. 14.6° D. 27.7° E. 13.9°
Projectile Motion: A person throws a ball horizontally from the top of a building that is 24.0 m above the ground level. The ball lands 100 m down range from the base of the building. What was the initial velocity of the ball? Neglect air resistance and use g = 9.81 m/s2.
A. 202 m/s B. 9.80 m/s C. 19.6 m/s D. 45.2 m/s E. 94.4°
Fluid Flow: Water flows through a horizontal pipe of cross-sectional area 10.0 cm2 at a pressure of 0.250 atm with a flow rate is 1.00 L/s. At a valve, the effective cross-sectional area of the pipe is reduced to 5.00 cm2. What is the pressure at the valve? The density of water is 1000 kg/m3, and treat it as an ideal incompressible fluid.
A. 0.110 atm B. 0.235 atm C. 0.200 atm D. 0.157 atm E. 7700 Pa