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1 how far away from a long straight wire is the magnetic field strength 16 x 10-2 t the current through the wire is
1 a generator consists of 250 turns of wire each with a radius of 87cm the armature turns with a frequency of 120rs in
a battery supplies a steady current of 56a for 21s during this time 1410j of chemical energy is transformed into
lightning strikes a solid iron flag pole which has a resistance of 20 x 10-4 ohms the potential difference between the
a compact mass m is attached to the end of a uniform rod of equal mass m and length l that is pivoted at the top figa
1 the deflection of the electron beam on the end of a cathode ray tube is observed to be 24 cm when the potential
1 a moon of a certain planet has an orbital radius of 13 x 108 m and an orbital period of 52 x 105 s if a satellite is
1 a proton with a speed of 45 x 106 ms is observed to travel in a circle of radius 022m in a magnetic field what is the
a compact disc will break apart if it rotated at a rate of about 23000 rpm what is the velocity and centripital
a diver stands on a diving board as shown in attached diagram the centre of gravity of the diving board is marked cg if
1 an electron in a vacuum acelerates from rest through a potential difference of 550v and then enters a magnetic field
a thin 152 m long copper rod has a mass of 524 g what is the minimum current in the rod that will cause it to float in
a thin cylindrical ring starts from rest at a height h1 81 m the ring has a radius r 12 cm and a mass m 2
refer to figure below and find the equation for tan theta as a function of x and lhint start by using the approximation
a thin double convex lens having a focal length of magnitude 275 cm is placed 1000 m from a plane mirror that is
a thin film of gasoline floats on a puddle of water sunlight falls perpendicularly on the film and reflects into your
a thin film of oil with index of refraction n 155 and thickness t 75 nm floats on water the oil is illuminated from
the colours on a soap bubble are also due to interference what is the minimum difference in thickness of a bubble film
a thin film with a thickness of 2727 nm and with air on both sides is illuminated with a beam of white light assume the
collision of cosmic rays with the upper atmosphere gives rise to a stream of particles called muons the proper lifetime
at a college homecoming 18 students lifted a sports car each student exerted 400n of upward force on the cara what is
on a cold winter day the outside temperature is -50 degc while the interior of a well-insulated garage is maintained at
a thin layer of oil n 125 is on top of a puddle of water n 133 if normally incident 500-nm light is strongly
a thin lens forms an image of an overhead electric lamp on a piece of paper the distance to the lamp from the lense is
a thin lens made with crown glass n155 has a focal length of 100 cm an identical lens with flint glass n165 was made