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Question

The amount of time it takes for one cycle is called the<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

                   is the symbol used to represent

The symbol for ______________ reactance is <?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" />      

The base unit for capacitive reactance is the

The resultant of the phasor addition of XC and R is their total opposition in ohms called

A series circuit has different voltage drops but one common

is the ability of a conductor to produce voltage when the current varies.

The symbol for inductance is L, and the unit is the

The ability of a conductor to induce voltage in itself when the current changes is its

The most common trouble in coils is a(n) ______________ winding.

Three capacitors of 10, 20, and 50 microF are connected in parallel. Calculate the total capacitance

Three capacitors of 8, 10, and 40 microF are connected in series. Calculate the total capacitance.

Two capacitors C1 = 0.01microF and C2 = 0.02microF are in series with a voltage source of Vt = 30Vrms, f = 15.915kHz. Calculate the total capacitive reactance of the series circuit.

Two coils of 10H each are connected in series aiding and have a mutual inductance of 0.75H. Calculate total inductance.

Three inductors of 20, 30, and 60mH are connected in parallel. Assume no mutual inductance. Calculate the total inductance

Explanation / Answer

1. The amount of time it takes for one cycle is called the TIME PERIOD

2. The symbol for ______________ reactance is   

Ans. For Capacitive Reactance symbol is Xc and for Inductive Reactance symbol is XL

3. The base unit for capacitive reactance is OHMS

4. The resultant of the phasor addition of XC and R is their total opposition in ohms called IMPEDANCE

5. A series circuit has different voltage drops but one common CURRENT

6. SELF REACTANCE is the ability of a conductor to produce voltage when the current varies.

7. The symbol for inductance is L, and the unit is the HENRY

8. The ability of a conductor to induce voltage in itself when the current changes is its SELF INDUCTANCE or SELF REACTANCE

9. The most common trouble in coils is a(n) CONCENTRIC winding

10. Three capacitors of 10, 20, and 50 microF are connected in parallel. Calculate the total capacitance?

Sol: Ceq = 10+20+50 = 80 microF

11. Three capacitors of 8, 10, and 40 microF are connected in series. Calculate the total capacitance.

Sol: 1/Ceq = 1/8 + 1/10 + 1/40 => Ceq = 4 microF

12. Two capacitors C1 = 0.01microF and C2 = 0.02microF are in series with a voltage source of Vt = 30Vrms, f = 15.915kHz. Calculate the total capacitive reactance of the series circuit.

Sol: Xc1 = 1/wC1 Xc2 = 1/wC2

w = 2*pi*f

Xc1 = 1000 Ohms Xc2 = 500 Ohms

Xc Total = (1000*500) / (1000+500) = 333.33 Ohms

13. Two coils of 10H each are connected in series aiding and have a mutual inductance of 0.75H. Calculate total inductance.

Sol: L total = L1 + L2 + 2M = 10+10+ (2*0.75) = 21.5H

14. Three inductors of 20, 30, and 60mH are connected in parallel. Assume no mutual inductance. Calculate the total inductance

Sol: 1/Leq = 1/20 + 1/30 + 1/60 => Leq = 10H

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