In the figure shown, A1, A2, A3 are identical Ammeters. If A1 and A3 read 5 and

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Question
In the figure shown, A₁, A₂, A₃ are identical Ammeters. If A₁ and A₃ read 5 and 13 A respectively, reading of A₂ will be
Options
A. 8
B. 13 A
C. 18
D. 12 A

Correct Answer

12 A

Explanation

A₂ = 13² - 25 ⟹ 12 A.

Networks Analysis and Synthesis problems

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1. The current wave shape shown in figure (1) is applied to a circuit element. The voltage across the element is shown in figure (2). The element is
Options
A. R
B. L
C. C
D. Semiconductor

2. The electrical energy required to heat a bucket of water to a certain temperature is 2 kWh. If heat losses, are 25%, the energy input is
Options
A. 2.67 kWh
B. 3 kWh
C. 2.5 kWh
D. 3.5 kWh

3. When a current source I is suddenly connected across a two terminal relaxed RC circuit at time t = 0, the voltage across the current source is shown in figure. The RC circuit is
Options
A. a series combination of R and C
B. a parallel combination of R and C
C. a series combination of R and parallel combination of R and C
D. a pure capacitor

5. The current rating of a cable depends on
Options
A. length of cable
B. diameter of cable
C. both length and diameter of cable
D. none of the above

6. In an R-C series circuit excited by a voltage E, the charge across capacitor at t = 0⁺ is
Options
A. 0
B. CE
C. CE (1 - e^-t/RC)
D. none of the above

7. A two branch parallel circuit has a 20 ? resistance and 1 H inductance in one branch and a 100 ?F capacitor in the second branch. It is fed from 100 V ac supply, at resonance, the input impedance of the circuit is
Options
A. 500 ?
B. 50 ?
C. 20 ?
D. 5 ?

9. An infinite ladder is constructed with 1 ? and 2 ? resistors shown below.
Options
A. 8.18 A
B. 0 A
C. 9 A
D. can't determined

10. A 0.5 ?F capacitor is connected across a 10 V battery. After a long time, the circuit current and voltage across capacitor will be
Options
A. 0.5 A and 0 V
B. 0 A and 10 V
C. 20 A and 5 V
D. 0.05 A and 5 V

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