A current is flowing through a conductor with non-uniform area of cross-section. Then

Electronics and Communication Engineering (ECE) : Networks Analysis and Synthesis - Quiz(MCQ)

current will be the same at all the cross-sections.

current will be different at different cross-sections.

current will be different but current density will be same at all the cross-sections

current will be the same but current density will be different at different cross-sections.

Correct Answer : Option (D) : current will be the same but current density will be different at different cross-sections.

Explanation : Current density = current/area of cross-section. Same current throughout the conductor.

Since, area of cross-section is non-uniform, current density will be different at different cross-sections.

Recently Updated in Networks Analysis and Synthesis Questions

Ohm's law is valid for

dc voltage and current

ac voltage and current

dc and ac voltages and currents

all voltages and current

Correct Answer : all voltages and current

Explanation : KCL and KVL are valid for voltages and currents of all wave shapes during transient as well as steady state conductions.

If e = 110 sin (ωt + p/3) and i = 5 sin (ωt - p/3), the impedance of the circuit is

11 Ω

16 Ω

22 Ω

30.8 Ω

Correct Answer : 22 Ω

Explaination :

Two phasors having rms values V₁ and V₂ which are added to give a phasor having rms value V₃. V₃ is maximum if phase angle between V₁ and V₂ is

90°

180°

270°

360°

Correct Answer :

360°

Explaination : Sum of phasors is maximum if they are in phase and 360° = 0.

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