Practical Electrical Testing in Physics and Electrical Engineering: Being a Course Suitable for First and Second Year Students and Others |
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Page 28
... pressing K a steady deflection of about one - tenth of the available part of the scale is obtained . Note this deflection d and the value of r . ( 3 ) Repeat ( 2 ) for about ten different deflections , rising by about equal increments ...
... pressing K a steady deflection of about one - tenth of the available part of the scale is obtained . Note this deflection d and the value of r . ( 3 ) Repeat ( 2 ) for about ten different deflections , rising by about equal increments ...
Page 35
... pressed , note the position D of K , on the scale and the deflection d of the galvano- YB K G K S FIG . 17 . meter . ( 3 ) Repeat ( 2 ) every 10 cms . down the scale to the other end . NOTE . If a tangent or sine galvanometer is used ...
... pressed , note the position D of K , on the scale and the deflection d of the galvano- YB K G K S FIG . 17 . meter . ( 3 ) Repeat ( 2 ) every 10 cms . down the scale to the other end . NOTE . If a tangent or sine galvanometer is used ...
Page 38
... pressed before the galvanometer key K , to get over any in- ductive action in r , ( if present ) . In other words ... pressing it . Note the value of 1 and the lengths of AD each side of K , which are directly proportional to r , and ...
... pressed before the galvanometer key K , to get over any in- ductive action in r , ( if present ) . In other words ... pressing it . Note the value of 1 and the lengths of AD each side of K , which are directly proportional to r , and ...
Page 40
... pressed before the galvanometer key K1 , to allow the currents in the arms to become steady before pressing K. The battery key should be pressed for as short a time as possible , so as to prevent the coils being heated by the current ...
... pressed before the galvanometer key K1 , to allow the currents in the arms to become steady before pressing K. The battery key should be pressed for as short a time as possible , so as to prevent the coils being heated by the current ...
Page 42
... pressing K there is no deflection on g . Note the value of R , which there- forex . N.B. If it is impossible to obtain no deflection with the available values of resistances in R , adjust R by the smallest possible amount , so as to get ...
... pressing K there is no deflection on g . Note the value of R , which there- forex . N.B. If it is impossible to obtain no deflection with the available values of resistances in R , adjust R by the smallest possible amount , so as to get ...
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Common terms and phrases
abscissæ accurate adjust the galvanometer amperes amps apparatus arrangement axis balance ballistic galvanometer battery C₁ capacity cells centre charge circuit coil condenser connected constant convenient copper Crown 8vo curve d₁ deflection Diagrams dip circle discharge E₁ earth ebonite electrometer farads fixed galvanometer resistance Hence high-resistance horizontal Illustrations inductor Inferences instrument insulated internal resistance K₁ Leclanché cells lines of force magnetic moment magnetizing force magnetometer means measuring method mirror galvanometer mutual induction Note the values Observations.-(1 obtained Ohm's law ohms pairs plates plug pole position potential quadrants quantity of electricity R₁ R₂ Repeat resistance box results as follows reversing rheostat scale screws secohmmeter secohms self-induction sensitive shown in Fig shunt solenoid specimen spot of light standard steady current suitable tabulate as follows tabulate your results tangent galvanometer temperature terminals tested throw tube V₁ V₂ volts Wheatstone bridge wire Woodcuts zero
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