Methods of Electrical Measurement |
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Page 103
... connected directly to earth and the bridge is balanced , D will also be at earth potential and the capacitances C , and C are short - circuited and have no effect . Capacitances C1 and C , are then , in effect , connected from A and C ...
... connected directly to earth and the bridge is balanced , D will also be at earth potential and the capacitances C , and C are short - circuited and have no effect . Capacitances C1 and C , are then , in effect , connected from A and C ...
Page 142
... connected in parallel . Then , if the resistances of all sections are equal , the back e.m.f.s due to flux linked must be equal , because the applied p.d.s are equal . This implies that the value of flux linked with each section must be ...
... connected in parallel . Then , if the resistances of all sections are equal , the back e.m.f.s due to flux linked must be equal , because the applied p.d.s are equal . This implies that the value of flux linked with each section must be ...
Page 166
... connected to one of the other pair and the two pairs in parallel are connected across a supply of 75 V ( r.m.s. ) . Neglecting fringing effects , calculate the length of line produced on a fluorescent screen 30 cm . distant from the ...
... connected to one of the other pair and the two pairs in parallel are connected across a supply of 75 V ( r.m.s. ) . Neglecting fringing effects , calculate the length of line produced on a fluorescent screen 30 cm . distant from the ...
Contents
THE A C POTENTIOMETER | 49 |
SIMPLE METHODS OF MEASUREMENT OF INDUCTANCE | 58 |
A C BRIDGE METHODS | 73 |
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a.c. potentiometer a.c. Supply accuracy accurate adjusted alternating alternating current ammeter amperes anode arrangement B.Sc.II balance condition ballistic galvanometer bridge circuit bridge methods C₁ C₂ calibrated capacitance cathode-ray tube centimetre charge circuit of fig components connected in series constant deflection detector determined dielectric dimensions direct current e.s. units effect electrical quantities electron electrostatic equal flux density frequency give Hence hysteresis I₁ impedance induced e.m.f. insulation L₁ large number M.K.S. unit magnetizing force measurement meter mutual inductance non-inductive resistance number of turns obtained ohms parallel permeability phase angle plates potential difference potentiometer power factor practical units primary standard R₁ R₂ reactance reading resonance reversed S₁ screen search coil self-inductance sensitivity shown in fig shunt slide-wire solenoid specimen suitable switch tance terminals Thévenin's theorem unknown p.d. usually V₁ V₂ valve voltmeter variable voltage voltmeter volts wattmeter Wheatstone bridge wire Y-plates zero