Alternating Current (Part 2)
21) How is peak value related to average value?
ANSWER) Iave = 0.637 Imax
22) What is an instantaneous value?
ANSWER) It is the value of alternating quantity at any time during a cycle.
23) How is instantaneous value related to maximum value?
ANSWER) i = Imax sin wt
24) What is form factor?
ANSWER) It is the ratio of RMS value to average value of an alternating quantity.
25) What is phase difference?
ANSWER) It is the angular displacement between two alternating quantities.
26) When are two alternating quantities in phase?
ANSWER) Two alternating quantities are in phase if they attain minimum and maximum values at the same time.
27) What is resistance?
ANSWER) It is the opposition to the flow of direct current.
28) What is impedance?
ANSWER) It is the total opposition to the flow of alternating current.
29) What are the components of impedance?
ANSWER) Resistance, inductive reactance and capacitive reactance.
30) What is inductance?
ANSWER) It is the property of an AC current due to which an opposing EMF is produced in the circuit.
31) What is inductive reactance?
ANSWER) It is the opposition to the flow of AC due to the inductance of the circuit. It is denoted by XL and is given by XL = 2πfL
where f is frequency and L is inductance.
32) How voltage, current and impedance are related on an AC circuit?
ANSWER) V = IZ Where Z is the impedance.
33) Does a DC circuit possess inductance?
ANSWER) No.
34) What is susceptance?
ANSWER) It is the reciprocal of reactance and is denoted by ‘B’.
35) What is capacitive reactance?
ANSWER) It is the opposition to the flow of current due to capacitance of a circuit
36) What is conductance?
ANSWER) It is reciprocal of resistance and is denoted by 'G’
37) What is admittance?
ANSWER) It is reciprocal of impedance and is denoted by 'Y'
38) What are the components of admittance?
ANSWER) Conductance and Susceptance.
39) How capacitive reactance is calculated?
ANSWER) Xc = 1/2πfc
where c is capacitance.
40) What is the amount of power in DC circuit?
ANSWER) P = VI Where P is the power.
ANSWER) Iave = 0.637 Imax
22) What is an instantaneous value?
ANSWER) It is the value of alternating quantity at any time during a cycle.
23) How is instantaneous value related to maximum value?
ANSWER) i = Imax sin wt
24) What is form factor?
ANSWER) It is the ratio of RMS value to average value of an alternating quantity.
25) What is phase difference?
ANSWER) It is the angular displacement between two alternating quantities.
26) When are two alternating quantities in phase?
ANSWER) Two alternating quantities are in phase if they attain minimum and maximum values at the same time.
27) What is resistance?
ANSWER) It is the opposition to the flow of direct current.
28) What is impedance?
ANSWER) It is the total opposition to the flow of alternating current.
29) What are the components of impedance?
ANSWER) Resistance, inductive reactance and capacitive reactance.
30) What is inductance?
ANSWER) It is the property of an AC current due to which an opposing EMF is produced in the circuit.
31) What is inductive reactance?
ANSWER) It is the opposition to the flow of AC due to the inductance of the circuit. It is denoted by XL and is given by XL = 2πfL
where f is frequency and L is inductance.
32) How voltage, current and impedance are related on an AC circuit?
ANSWER) V = IZ Where Z is the impedance.
33) Does a DC circuit possess inductance?
ANSWER) No.
34) What is susceptance?
ANSWER) It is the reciprocal of reactance and is denoted by ‘B’.
35) What is capacitive reactance?
ANSWER) It is the opposition to the flow of current due to capacitance of a circuit
36) What is conductance?
ANSWER) It is reciprocal of resistance and is denoted by 'G’
37) What is admittance?
ANSWER) It is reciprocal of impedance and is denoted by 'Y'
38) What are the components of admittance?
ANSWER) Conductance and Susceptance.
39) How capacitive reactance is calculated?
ANSWER) Xc = 1/2πfc
where c is capacitance.
40) What is the amount of power in DC circuit?
ANSWER) P = VI Where P is the power.
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