centerpiece
stringclasses 4
values | options
list | correct_options
list | correct_options_idx
list | correct_options_literal
list |
|---|---|---|---|---|
A pipe full of air is closed at one end. A standing wave is produced in the pipe, causing the pipe to sound a note. Which of the following is a correct statement about the wave’s properties at the closed end of the pipe?
|
[
"The pressure is at a node, but the particle displacement is at an antinode.",
"The pressure is at an antinode, but the particle displacement is at a node.",
"The pressure and the particle displacement are both at nodes.",
"The pressure and the particle displacement are both at antinodes."
] |
[
"B"
] |
[
1
] |
[
"The pressure is at an antinode, but the particle displacement is at a node."
] |
A photocell of work function ϕ = 2eV is connected to a resistor in series. Light of frequency f = 1 × 10^15 Hz hits a metal plate of the photocell. If the power of the light is P = 100 W, what is the current through the resistor?
|
[
"2:00 AM",
"6:00 AM",
"12:00 AM",
"24 A"
] |
[
"D"
] |
[
3
] |
[
"24 A"
] |
A microwave oven is connected to an outlet, 120 V, and draws a current of 2 amps. At what rate is energy being used by the microwave oven?
|
[
"10 W",
"30 W",
"60 W",
"240 W"
] |
[
"D"
] |
[
3
] |
[
"240 W"
] |
A point charge, Q = +1 mC, is fixed at the origin. How much work is required to move a charge, Q = +8 µC, from the point (0, 4 meters) to the point (3 meters, 0)?
|
[
"3.5 J",
"6.0 J",
"22.5 J",
"40 J"
] |
[
"B"
] |
[
1
] |
[
"6.0 J"
] |
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