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 2
... give an irregular and erroneous curve if the latter was drawn through all of them . Thus we see that a curve corrects experimental observations , and in addition enables the nature of the law of the instrument to be observed . Fig . 1 ...
... give an irregular and erroneous curve if the latter was drawn through all of them . Thus we see that a curve corrects experimental observations , and in addition enables the nature of the law of the instrument to be observed . Fig . 1 ...
Page 8
... Give the needle a motion of rotation of about 20 ° by bringing an outside magnet or piece of iron near one end . Now remove this and all other magnets to a distance , and count the number of transits , N of one end in say two minutes ...
... Give the needle a motion of rotation of about 20 ° by bringing an outside magnet or piece of iron near one end . Now remove this and all other magnets to a distance , and count the number of transits , N of one end in say two minutes ...
Page 11
... gives the dip corrected for this error . The correction is more im- portant in the " dip circle " than in most other instruments , because , owing to the needle rolling on its pivots , the axis shifts its position along a horizontal ...
... gives the dip corrected for this error . The correction is more im- portant in the " dip circle " than in most other instruments , because , owing to the needle rolling on its pivots , the axis shifts its position along a horizontal ...
Page 23
... give to the needle a motion of pure rotation of an arc , not exceeding about 7 ° or 8 ° by means of an outside magnet , and note the time in seconds of 100 transits ( N ) of the end of the needle past the mark . ( 3 ) Repeat ( 2 ) about ...
... give to the needle a motion of pure rotation of an arc , not exceeding about 7 ° or 8 ° by means of an outside magnet , and note the time in seconds of 100 transits ( N ) of the end of the needle past the mark . ( 3 ) Repeat ( 2 ) about ...
Page 36
... gives too large a deflection with in circuit , R the resistance S can be reduced so as to shunt more current past G , and so diminish its deflection . BT S FIG . 18 . Observations . — ( 1 ) Connect up as indicated in Fig . 18 , and ...
... gives too large a deflection with in circuit , R the resistance S can be reduced so as to shunt more current past G , and so diminish its deflection . BT S FIG . 18 . Observations . — ( 1 ) Connect up as indicated in Fig . 18 , and ...
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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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