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 10
... centre of gravity of each area on to the abscissæ . 5. Measurement of Magnetic Dip ( Dip Circle Method ) . - Introduction . The magnetic dip at any place is the angle which the magnetic axis of a magnetized needle makes with a ...
... centre of gravity of each area on to the abscissæ . 5. Measurement of Magnetic Dip ( Dip Circle Method ) . - Introduction . The magnetic dip at any place is the angle which the magnetic axis of a magnetized needle makes with a ...
Page 11
... centre of gravity will now be above O , and hence the dip will be too small . The mean consequently gives the dip corrected for error ( c ) . 1 H F FIG . 6 . 0 If a magnetic needle is pivoted on a hori- zontal axis passing through its ...
... centre of gravity will now be above O , and hence the dip will be too small . The mean consequently gives the dip corrected for error ( c ) . 1 H F FIG . 6 . 0 If a magnetic needle is pivoted on a hori- zontal axis passing through its ...
Page 14
... centre of the suspended needle . This is called the " A. position of Gauss . " ( B ) The magnetic axis of the bar magnet pointing east and H -NE Ꭶ n d R FIG . 7 . west , but the line joining its centre with that of the needle lies in ...
... centre of the suspended needle . This is called the " A. position of Gauss . " ( B ) The magnetic axis of the bar magnet pointing east and H -NE Ꭶ n d R FIG . 7 . west , but the line joining its centre with that of the needle lies in ...
Page 15
... centre at 100 on the scale . Note the deflection 6 ° ( or tan 6 ) and distance d cms . of its " centre " from that of the needle . ( 3 ) Repeat ( 2 ) with the south end of the magnet pointing eastwards , and with the value of d the same ...
... centre at 100 on the scale . Note the deflection 6 ° ( or tan 6 ) and distance d cms . of its " centre " from that of the needle . ( 3 ) Repeat ( 2 ) with the south end of the magnet pointing eastwards , and with the value of d the same ...
Page 16
... centre at some convenient distance d , say , 100 cms . from us , if not too great to obtain a suitable steady deflection 0 ° ( or tan 6 ) . ( 3 ) Repeat ( 2 ) with the magnet re- versed in position , i.e. position of its poles ...
... centre at some convenient distance d , say , 100 cms . from us , if not too great to obtain a suitable steady deflection 0 ° ( or tan 6 ) . ( 3 ) Repeat ( 2 ) with the magnet re- versed in position , i.e. position of its poles ...
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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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