NEW
Font size
WorksheetsFC PHYSICS 5
Total questions: 36
Worksheet time: 18mins
A periodic wave has a frequency of 5.0 Hz. What is the wave period?
0.20 s
0.02 s
5.0 s
0.5 s
The current in a 40-W, 120-V electric Light bulb is
1/3 A
3 A
80 A
4800 A
The human eye is most sensitive to yellow green light having a frequency of about 5.45 x 1014 Hz (a wavelength of about 550 nm), What is the energy in joules of the photons associated with this Light?
3.61 x 10^-19 J
3.67 x 1O^-21 J
3.65 X 1O^-22 J
3.64 x 10^-24 J
Calculate the de Broglie wavelength of a 0.50-kg ball moving with a constant velocity of 26 m/s
5.10 x 10^-35 m
2.21 x 10^-35 m
2.21 x 1O^-36 m
5.1 x 10^-36 m
An electric appliance consumed 1.5 kWh when continuously operated in two hours. What is the wattage of this appliance?
1,500 W
3,000 W
750 W
0.75 W
A heat engine operates with 65.0 kcal heat and exhausts 40.0 kcal of heat. How much work did the engine do?
130 kJ
120 kJ
110 kJ
105 kJ
Who is credited with inventing the unit "horsepower" to compare the power of his steam engines to that of draft horses?
Nikola Tesla
James Watt
Isaac Newton
Michael Faraday
One mechanical horsepower is defined as the power required to lift 550 pounds by what distance in one second?
One inch
One foot
One meter
One yard
Approximately how many watts are equivalent to one mechanical horsepower?
100 W
550 W
746 W
1000 W
Power is defined as the rate of doing what?
Applying force
Doing work
Gaining momentum
Changing velocity
A construction which needs to lift a 1,100-pound steel beam to a height of 50 feet in 10 seconds. What is the minimum horsepower required from the winch's motor to perform this task?
10
15
20
25
An engine is tested on a dynamometer and produces a peak torque of 350 lb-ft at an engine speed of 4,000 RPM. How much horsepower is the engine producing at that specific point?
250.6 hp
266.6 hp
366.6 hp
300 hp
An industrial electric motor is rated at 30 kilowatts (kW). What is its equivalent power rating in mechanical horsepower? (Use the conversion 1 hp ≈ 746 W).
20.2 hp
30.1 hp
50.1 hp
40.2 hp
The power rating of on electric motor draws current of 4A when operated at 110 V
400 W
1000 W
40 W
440 W
To separate a 0.25-C charge from or charge, 30J of work is done. What is the electric potential energy of the charge?
120 J
30 J
7.5 J
15 J
An electrical appliance has a resistance of 20 ohm. What voltage is needed if the current is 4.5 A?
45 V
80 V
90 V
100 V
If carbon tetrachloride has an index of refraction of 1.461, what is the speed of light through this liquid?
1.46x108 m/s
2.05x108 m/s
4.38x108 m/s
4.46 x 108 m/s
What is the correct voltage drop across an electric bulb if the current passing through It is 4A and its resistance is 50 ohms?
20 V
50 V
100 V
200 V
How much electric energy in used up In 2 hours by a 220 V electric stove whoso power rating is 3 kilowatts?
3 kwh
6 kwh
440 kwh
660 kwh
If light travels through a glass at a speed of 1.5 x 1O8 m/s, what is its index of refraction if the speed of light is equal to 3.0 x 1O8 m/s?
0.5
2.0
3.0
4.0
Which of the following combination of length (L) and crass sectional area (A) will give a certain conductor the least resistance?
L and A
2 L and 2 A
2 L and ½ A
L and 2 A
During the thunderstorm, 4.0 s elapses between observing a lightning flash and hearing the resulting thunder. Approximately how far away in km and mi was the lightning flash?
1.4 km or 0.9 mi
1.3 km or 0.80 mi
2.8 km or 1.8 mi
2.6 km or 1.6 mi
If the index of refraction of crown glass is 1.5, what is the speed of light in crown glass?
2 x 108 m/s
2 x 118 m/s
2 x 108 m/s
2 x 208 m/s
A fluorescent lamp rated at 100kW has an efficiency of 20%. How much energy is dissipated as heat if the lamp is used for 5 hours?
16kW-hrs
100kW-hrs
400kW-hrs
40kW-hrs
A person is riding a moped that is traveling at 20 m/s. What is the speed of the ball if the moped rider throws a ball forward at 4 m/s while riding the moped?
36 m/s
20 m/s
24 m/s
48 m/s
The frequency of a light wave is 5.0 x 1014hertz. What is the period of the wave?
6.0 x 10-7s
5.0 x 10-14s
2.0 x 10-15s
1.7 x 10-8s
Find the force of repulsion + 0.5 and +2 with a distance of 3m?
1.998 x 10^8 N
3.998 x 10^8 N
2.998 x 10^8 N
9.986 x 10^8 N
A chemistry book slides off a horizontal table top with an applied force is 1.19 m/s. It reached the ground in 0.350 seconds Ignoring air resistance, what is the total height it fell?
1.5 m
1.25 m
0.80 m
0.60 m
The wavelength of yellow light is 600 nanometers. What is its wavelength in centimeters?
6.0x10-2
6.0x10-7
6.0x10-9
6.0x10-5
Using the harmonic law, calculate the period of a planet whose orbit has a semi-major axis of 1.52 AU.
1.57 y
1.87 y
1.77 y
1.67 y
If the is 256Hz, what are the frequencies of the 1st and second overtones?
612Hz and 868Hz
418Hz and 668Hz
312Hz and 568Hz
512Hz and 768Hz
A current of 0.5A exist in a 60 Q lamp. The applied potential difference is.
120V
15V
30V
60V
What is the radius in nm of the electron orbit of a hydrogen atom for n=3?
0.356 nm
0.477 nm
0.377 nm
0.456 nm
A brick dropped from the roof of a building. If the brick strikes the ground after 5.0 s, the height of the building in meters is
132 m
122 m
125 m
135 m
What is the frequency of electromagnetic radiation whose wavelength is 6m?
1.8 x 10^2 Hz
5.0 x 10^-15 Hz
1.3 x 10^23 Hz
5.0 x 10^7 Hz
A step down transformer is designed to work in a 12 V lamp from 220 V supply. If the primary coil has 900 turns, what is the number of turns in the secondary coil?
99
98
50
49
