Instrumentation Engineering
GATE IN topic:voltage-current-sources PYQs
Build your understanding with focused practice from past exam papers.
How to practice topic:voltage-current-sources
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–10 of 10. Imported answers require independent review unless marked reviewed.
Question 63
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In the circuit shown, the switch is opened at
s. The current
at
ms is ____________ mA (rounded off to two decimal places). 
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Open questionINNAT2 marksNeeds review
A signal
V is applied to the circuit consisting of a switch S and capacitor C = 0.1
F, as shown in the figure. The output
of the circuit is fed to an ADC having an input impedance consisting of a 10 M
resistance in parallel with a 0.1
F capacitor. If S is opened at
s, the value of
at
s will be ______ V (rounded off to two decimal places).Note: Assume all components are ideal.
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The switch in the following figure has been closed for a long time (
). It is opened at
seconds. The value of
at
is ________ V/s (rounded off to nearest integer). 
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The R-L circuit with
and
mH is excited by a step current
. At
, there is a current
flowing through the inductor. The minimum time taken for current through the inductor to reach 99% of its final value is ______
s (rounded off to two decimal places).
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In the circuit shown, the capacitance
F and inductance
mH and the diode is ideal. The capacitor is initially charged to 10 V and the current in the inductor is initially zero. If the switch is closed at
, the voltage
(in volts) across the capacitor at
s is ______ (round off to one decimal place) 
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In the circuit shown below, initially the switch S₁ is open, the capacitor C1 has a charge of 6 coulomb, and the capacitor C2 has 0 coulomb. After S₁ is closed, the charge on C2 in steady state is ______ coulomb.
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In the circuit shown below, a step input voltage of magnitude 5 V is applied at node A at time
. If the capacitor has no charge for
, the voltage at node P at
is ______ V. (Answer should be rounded off to two decimal places)
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A circuit consisting of dependent and independent sources is shown in the figure. If the voltage at Node-1 is
V, then the voltage at Node-2 is ______ V.
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The current response of a series R-L circuit to a unit step voltage is given in the table. The value of L is __________ H.
in s | 0 | 0.25 | 0.5 | 0.75 | 1.0 | … | |
|---|---|---|---|---|---|---|---|
in A | 0 | 0.197 | 0.316 | 0.388 | 0.432 | … | 0.5 |
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In the circuit diagram, shown in the figure,
was closed and
was open for a very long time. At
,
is opened and
is closed. The voltage across the capacitor, in volt, at
s is __________.
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