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A step index fiber is made with a core of refractive index 1.36, a diameter of 49pm and a fractional refractive index change of 0.025. it is operated at a wavelength of 1.3
Find the refractive index of cladding
Water circulates around a house in a hot-water heating system. If the water is pumped at a speed of 0.50m/s through a 5.0-cm diameter pipe in the basement hat will the flow speed be in in a 2.6-cm diameter pipe on the second floor 5.0m above?
Obtain the divergence and curl of electric field due to a point charge at
1- A far away point
2- It's own location
A resistive position transducer with a resistance of 5000 and a shaft stroke of 5.0 in. is used in the arrangement of Fig. (4). Potentiometer R 3 R 4 is also 5000, and V T = 5.0 V. The initial position to be used as a reference point is such that R 1 =R 2 (i.e.. the shaft is at midstroke). At the start of the test, potentiometer R 3 R 4 is adjusted so that the bridge is balanced (V E =0). Assuming that the object being monitored will move a maximum distance of 0.5 in. toward A, what will the new value of V E be
)For a certain thermistor, its resistance at 32 o F is known to be 9 KΩ. And at 212 o F is 2KΩ. Find its resistance at 77 o F.
)An Iron-Constantan thermocouple (TC) is used to measure temperature between 0 o C and 300 oC at which it generates 5268 μV. If the thermal emf is 12500 μV relative to the reference junction at 20 o C. Estimate the measured junction temperature.
A large container of water is placed on a set of scales which initially read 0.500 kg. The container has a overflow spout that can be used to collect any overflow into a second container.
The second container is also on a set of scales and is initially empty. The second set of scales initially read 0.065 kg.
A small ball is lowered into the large container, displacing water down the overflow spout and into the second container.
The readings on both scales are now 0.585 kg and 0.100 kg respectively.
What is the density of the ball? (to 2 s.f and in kg m−3)
(ρwater = 1000 kg m−3)
A tornado siren sounded from the center of town. The siren's sound wave traveled 910 meters at a constant velocity directly toward a school. It took the sound wave 2.6 seconds to travel that distance. What was the sound wave's velocity?
A box is pulled in three directions but remains stationary. One rope pulls South with a force of 210 N. Another rope pulls Northwest and the third rope pulls East. What is the magnitude of the force from the third rope that pulls East?
A man holds a rope which is draped over a pulley and attaches to a 65 kg mass on a 30° ramp. The rope pulls the mass back up the ramp with a force parallel to the slope of the ramp. Assuming there is no friction, what is the force of tension in the rope if the mass remains stationary?
