The source of electrons in a simple electric circuit is
A) the voltage source.
B) energy stored in the voltage source.
C) energy released by the voltage source.
D) the electrical circuit itself.
E) none of the above
A 60-W and a 100-W light bulb are rated at 120V. Which bulb has a higher resistance?
A) 60-W bulb
B) 100-W bulb
C) both the same.
Your hand is warmed when you blow on it with your mouth open, but when your lips
are puckered so that air expands as you blow, your hand is
A) warmer still.
B) cooler.
C) neither warmer nor cooler.
Look at full-color photos in your textbook with a magnifying glass and you’ll see inks
of
A) red, green, and blue.
B) red, green, blue, and black.
C) magenta, cyan, and yellow.
D) magenta, cyan, yellow, and black.
E) none of these
The electric field inside an uncharged metal ball is zero. If the ball is negatively
charged, the electric field inside the ball is then
A) less than zero.
B) zero.
C) greater than zero.
Acceleration is greater for a satellite when it is at the
A) apogee (farthest point).
B) perigee (closest point).
C) zenith.
D) same acceleration at all of the above places.
Which is the strongest fundamental force?
A) gravitational force.
B) electric force.
C) nuclear strong force.
D) none of the above
A rough surface for infrared waves may be polished for
A) radio waves.
B) light waves.
C) both of these
D) neither of these
When sound waves superimpose they can interfere
A) constructively.
B) destructively.
C) either of these
D) neither of these
Nellie hangs from a pair of ropes at an angle. Tension in the ropes depends on the
A) length of the ropes.
B) angle of the ropes.
C) both of these
D) neither of these
Electric charge distributes itself on conducting surfaces
A) with greater concentration on more curved parts.
B) such that the electric field inside is zero.
C) both of the above
D) none of the above
Your friend says that any radio wave travels appreciably faster than any sound wave.
A) agree with your friend unconditionally
B) agree with your friend for most common cases
C) disagree with your friend
D) find a new friend
When 10 grams of hot water cool by 1oC, the amount of heat given off is
A) 41.9 calories.
B) 41.9 Calories.
C) 41.9 joules.
D) more than 41.9 joules.
E) none of the above
To outside observers at rest, the overall sizes of objects traveling at relativistic speeds
are
A) larger.
B) smaller.
C) the same size.
The spectrum of a mercury vapor lamp under very high pressure appears as that from
A) an incandescent source.
B) a laser.
C) an ultraviolet source.
D) a gas other than mercury.
E) a monochromatic source.
The current in two identical light bulbs connected in series is 0.25 A. The voltage across
both bulbs is 110 V. The resistance of a single light bulb is
A) 22 ohms.
B) 44 ohms.
C) 220 ohms.
D) 440 ohms.
E) none of the above
When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard,
the speed of the skateboard
A) decreases.
B) increases.
C) neither decreases nor increases.
The planet Jupiter is about 300 times as massive as Earth, yet on its surface you would
weigh only about 3 times as much because
A) your mass is 100 times less on Jupiter.
B) Jupiter is significantly farther from the Sun.
C) Jupiter’s radius is about 10 times Earth’s radius.
D) you are 100 times more weightless there.
E) none of the above
We do not observe tides in a community swimming pool because
A) gravitation on the small mass of water is negligibly small.
B) it is shallow compared to the ocean.
C) all parts of it are practically the same distance from the Moon.
D) they are masked by the much stronger pull of Earth gravity.
E) the tides are only observed at night.
A nucleon has more mass on average when it is
A) inside the nucleus.
B) removed from the nucleus.
C) both the same
The solar constant for Earth is
A) 0.7 kW/m2.
B) 1.0 kW/m2.
C) 1.4 kW/m2.
D) more than 1.4 kW/m2.
In the equation E = hf, the symbol f stands for
A) wave frequency.
B) wavelength.
C) rate at which photons are emitted.
D) none of the above
Stare at a red wall for a few minutes and then gaze at a white wall. Due to retina fatigue
you see
A) more red.
B) cyan.
C) black.
On a giant rotating turntable are two clocks, one at the center and the other at the
rim.The clock that runs slower is at
A) the center of the turntable.
B) the rim of the turntable.
C) either of these
Particle A has twice the charge of nearby particle B. Compared to the force on Particle
A, the force on Particle B is
A) half as much.
B) the same.
C) twice as much.
D) four times as much.
E) none of the above
Light refracts when traveling from air into glass because of a change in light’s
A) intensity.
B) frequency.
C) speed.
D) all of the above
E) none of the above
A bicycle that travels four as fast as another when braking to a stop will skid
A) twice as far.
B) four times as far.
C) eight times as far
D) sixteen times as far.
E) depends on the mass of the bike
It is said that electric charge is conserved, which means that electric charge
A) may occur in an infinite variety of quantities.
B) is a whole number multiple of the charge of one electron.
C) will interact with neighboring electric charges.
D) can be neither created nor destroyed.
E) is sometimes negative.