Physics Alternating Current Level: High School
A series RCL circuit contains a 106 ohm resistor , a 3.3 micro-Farad capacitor , and a 31.0 mH inductor . The generator has a frequency of 609 Hz and an rms voltage of 35.0 V . Find the following .a) the phase angle between the current and the voltage of the generator .
b) the rms voltage across each circuit element .
Physics Electromagnetic Induction Level: High School
A uniform and constant (in time) magnetic field has a magnitude of 0.2 T and is perpendicular to a circular loop of wire (one turn) that has a radius of 0.3 m at t = 0 sec . At t = 0.22 s , the normal makes an angle of theta = 45 degrees with the field , because the coil has made one-eight of a revolution . Find the magnitude of the emf induced in the wire .
Physics Magnetism,Magnetic Effects Of Current Level: High School
A rectangular loop of wire , 9.0 cm by 5.0 cm carrying current I = 2.0 mA , is next to a very long wire carrying a current I = 8.0 A . The loop and the wire are 2.0 cm apart . The current in the loop travels clockwise and the current in the wire is traveling to the right .a) What is the direction of the magnetic force on each of the four sides of the rectangle due to wire’s magnetic field ?
b) Calculate the net magnetic force on the rectangular loop due to the long wire’s magnetic field .
(Hint : The long wire does not produce a uniform magnetic field)
Physics Current Electricity Level: High School
The heating element of a coffee maker operates at 120 volts and carries a current of 2 amps . Assuming that water absorbes all of the energy converted by the resistor , calculate how long its takes to heat 0.500 kg of water from room temperature (23.0 C) to boiling (100.0 C)a) Show that “T” (tau) = RC has units of time .
Physics Alternating Current Level: High School
At what frequency will a generator with an rms voltage of 504 V produce an rms current of 7.50 mA in a 0.0150 micro-F capacitor ?
Physics Alternating Current Level: High School
A 105 microF capacitor is connected to an ac generator with an rms voltage of 20.0 V and a frequency of 100.0 Hz . What is the rms current in this circuit ?
Physics Electromagnetic Induction Level: High School
A disk drive plugged into a 120-V outlet operates on a voltage of 9V . The transformer that powers the disk drive has 125 turns on its primary coil .a) Should the number of turns on the secondary coil be greater or less than 125 ?
b) Find the number of turns on the secondary coil .
Physics Alternating Current Level: High School
RL-Circuits- 6.0 V battery , 37-mH inductor , four 50 ohms resistors .a) Find the characteristic time for this circuit
b) What is the current supplied by this battery two characteristic time intervals after closing the switch ?
Physics Alternating Current Level: High School
If two branches of a 440 v parallel circuit have the impedances of z = 2-j and z = 1+3j , what is the true power in the circuit , approximately .
Physics Heat & Thermodynamics Level: High School
Heat Engine
An engine manufacturer makes the following claim : The heat input per second of the engine is 9.0kJ at 375K . The heat output per second is 4.0kJ at 225K . Do you believe these claims ? Explain why .
Physics Heat & Thermodynamics Level: High School
Determine the mean free path for nitrogen molecules with a diameter of 2.00*10^-10m at 20 degrees C and 1 atm .
Physics Heat & Thermodynamics Level: High School
Adiabatic Compression
A bicycle pump consists of cylinder 30cm long when the pump handle is all the way out . The pump contains air ( ã = 1.4) at 20 degrees C . If the pump outlet is blocked and the handle pushed until the internal length of the cylinder is 20 cm , by how much does the air temperature rise ? assume no heat loss .
Physics Heat & Thermodynamics Level: High School
An ideal gas is slowly compressed at a constant pressure of 2.0 atm from 10L to 20L . Then heat is added to the gas while holding the volume constant until the temperature reaches its original value . Calculatea) The total work done by the gas .
b) The total heat flow into the gas .
Physics Alternating Current Level: High School
An RLC circuit consists of a 15 microF capacitor , a 78 ohm resistor and a 90 mH inductor. The oscillator is set for 560 Hz output a sinusoidal voltage of 105 V. Determine :a) The current flowing in the circuit .
b) The voltage drop across each of the circuit elements .
Physics Magnetism,Magnetic Effects Of Current Level: High School
The power cable for an electric trolley carries a horizontal de current of 330 A toward the east , The earth’s magnetic field has a strength 5.0 x 10^5T and makes an angle of dip of 22 degree at this location . Calculate the magnitude and direction of the magnetic force on a 10-m length of this cable .