Physics Ray Optics Level: High School
In the fig 34-24 , a beam of unpolarized light , with intensity 43 W/m^2 , is sent into a system consisting of two polarizing sheets with polarizing directions at angles θ1= 73 degree and theta 2 = 90 degree to the y axis . What is the intensity of the light transmitted by the system ?
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Physics Ray Optics Level: High School
In the fig 34-24 ,a beam of light , with intensity 63 W/m^2 and polarization parallel to a y axis , is sent into a system of two polarizing sheets with polarizing directions at angles of theta 1 = 52 degree and theta 2 = 90 degree to the y axis . What is the intensity of the light transmitted by the two-sheet system ?
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Physics Ray Optics Level: High School
Polarization
In the fig 34-23 , initially unpolarized light is sent into a system of three polarizing sheets whose polarizing direction make angles of theta 1 = 36 degree θ 2 = 28 degree , and theta 3 = 52 degree with the direction of the y axis . What percentage of the light’s initial intensity is transmitted by the system ?
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Physics Electromagnetic Induction Level: High School
A square loop of wire of side 0.20 m has a total resistance of 0.60 ohm . The loop is positioned in a uniform magnetic field B of 0.030 T . The field is directed into the page , perpendicular to the plane of the loop , as shown above .a) Calculate the magnetic flux through the loop .
The field strength now increases uniformly to 0.20 T in 0.50 s.
b) Calculate the EMF induced in the loop during this period .
c)
i) Calculate the magnitude I of the current in the loop during this period .
ii) What is the direction of the current in the loop ?
d) Describe a method by which you could induce a current in the loop if the magnetic field remained constant .
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Misc Subject Misc Topic Level: Misc Level
Physics Magnetism,Magnetic Effects Of Current Level: High School
Force on a current carrying conductor in a magnetic field
A long straight wire with density of 50 g/m is suspended by threads, as shown in the Diagram below . A 10 A current in the wire experiences a horizontal magnetic force that deflects it to an equilibrium position angle of 20 degree .
a) What is the tension in the threads ?
b) What is the magnitude of the magnetic force F ?
c) What are the strength and direction of the magnetic field ?
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Physics Waves And Oscillations Level: High School
A man supports a stone on the flat plam of his hand and then moves his hand vertically with SHM and amplitude of 10 cm . If the man steadily increases the frequency with which he moves his hand , at what frequency will the stone just lose contact with his hand and where in the motion is this most likely to occur ?
Physics Waves And Oscillations Level: High School
A trolley of mass 5 kg is connected by two identical extended springs , one on each end , to two posts. When the trolley is displaced from its equilibrium positions along the line joining the posts what will be the frequency of oscillation ?
Physics Waves And Oscillations Level: High School
A particle executes SHM with amplitude of 2 m .When it is 1 m away from its equilibrium position its velocity is 3 ms^-1 . What is the periodic time for the oscillation ?
Physics Waves And Oscillations Level: High School
If the period o SHM is 8.0 s and the particle oscillates through a distance 1.2 m either side of its central position, find the maximum speed and the speed when the particle is 0.6 m from the central position .
Physics Heat & Thermodynamics Level: High School
Calculate the magnitude and direction of the electrical field at a point P which is 25 cm to the right of a point charge Q = -3.2 x 10 to the -6 C .
Physics Electrostatics Level: High School
Determine the magnitude of the electrical force on the electron of a hydrogen atom exerted by the single proton that the atom’s nucleus . Assume the average distance between the revolving electron and the proton is r = 0.51 x 10 to the – 10 m .
Physics Heat & Thermodynamics Level: High School
A steam engine operates between 550 degrees and 300 degrees C . What is the maximum possible efficiency of this engine ?
Physics Heat & Thermodynamics Level: High School
A steam engine operates between 550 degrees and 300 degrees C . What is the maximum possible efficiency of this engine ?
Physics Heat & Thermodynamics Level: High School
Work done in an adiatatic process
In an engine , 0.30 moles of an ideal monatomic gas in the cylinder expands rapidly and adiabatically against the piston . In the process , the temperature of gas drops from 1100 K to 45 K . How much work does the gas contain ?
