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B.Tech EEE Circuits and DC Instruments — practice questions

Explore 46 free Circuits and DC Instruments questions in B.Tech EEE Electrical Engineering. Open each question or exercise to read its content, reference answers and available explanation.

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Circuits and DC Instruments questions and exercises with answers

Showing questions 1–30 of 46.

Series or parallel wiring?Read the answer and worked solution →Order a loop rule attackRead the answer and worked solution →Match the meter to its jobRead the answer and worked solution →Complete the RC timing factsRead the answer and worked solution →Find the false battery claimRead the answer and worked solution →Which reading comes out bigger?Read the answer and worked solution →Spot the odd one outRead the answer and worked solution →Pair each formula with its nameRead the answer and worked solution →Three resistors of 2.0 ohm, 4.0 ohm and 6.0 ohm are connected in series across a battery. What is the equivalent resistance of the combination?Read the answer and worked solution →A 12.0 V battery drives a 1.00 ohm, a 6.00 ohm and a 13.0 ohm resistor connected in series. What current flows in the circuit?Read the answer and worked solution →A 12.0 V battery drives 1.00 ohm, 6.00 ohm and 13.0 ohm in series, producing a current of 0.600 A. What power does the 6.00 ohm resistor dissipate?Read the answer and worked solution →How is the battery voltage shared among resistors joined in series?Read the answer and worked solution →A 6.00 ohm resistor is wired in parallel with other resistors straight across a 12.0 V battery. What current flows through the 6.00 ohm resistor?Read the answer and worked solution →A 1.00 ohm, a 6.00 ohm and a 13.0 ohm resistor are connected in parallel across a 12.0 V battery. What is the total resistance of the combination?Read the answer and worked solution →What exactly is the electromotive force of a voltage source?Read the answer and worked solution →Every real voltage source is built from which two parts?Read the answer and worked solution →What does the internal resistance of a battery describe?Read the answer and worked solution →A battery of 12.0 V emf and 0.100 ohm internal resistance is connected to a 10.0 ohm load. What is its terminal voltage?Read the answer and worked solution →The same 12.0 V battery with 0.100 ohm internal resistance now drives a 0.500 ohm load. What are the current and the terminal voltage?Read the answer and worked solution →A 12.0 V battery ages until its internal resistance reaches 0.500 ohm, and it still drives a 0.500 ohm load. What power does the load now receive?Read the answer and worked solution →A charger is used to push current backwards through a battery. What must be true of the charger?Read the answer and worked solution →In a lead-acid cell each electron sent to the anode is given 2 eV of energy. What emf does one such cell provide?Read the answer and worked solution →Cards standing in for solar cells each give 0.5 V and 2 A in bright light. How many cards are needed to build an output of 3 V at 6 A?Read the answer and worked solution →A current of 8.0 A flows into a junction, and 3.0 A leaves along one of the two branches. What current leaves along the other?Read the answer and worked solution →What does Kirchhoff's loop rule require of any closed circuit path?Read the answer and worked solution →Which conservation law stands behind each of Kirchhoff's two rules?Read the answer and worked solution →While going round a loop you cross a resistor in the same direction as the current flowing in it. What is the change in potential?Read the answer and worked solution →In a single loop an 18 V supply has 1 V across its internal resistance and 12 V across one load resistor. What is the drop across the second load resistor?Read the answer and worked solution →Kirchhoff's rules applied to a two-loop circuit give I1 = I2 + I3, 18 = 6I1 + 3I2 and 45 = 6I1 + 2I3, with every current in amperes. What is I1?Read the answer and worked solution →Are Kirchhoff's rules limited to circuits that resist series and parallel reduction?Read the answer and worked solution →

Worked practice questions

Series or parallel wiring?

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Left

Series

Items

Item
Resistances add up
Answer
Series
Item
One shared current
Answer
Series
Item
Each gets full V
Answer
Parallel
Item
Voltage divides up
Answer
Series
Item
Total under lowest
Answer
Parallel
Item
Reciprocals add
Answer
Parallel
Item
One path only
Answer
Series
Item
Devices act alone
Answer
Parallel

Right

Parallel

Instructions

Swipe left if it fits resistors in series, right if it fits resistors in parallel.

_Source: OpenStax College Physics, section 21.1 Resistors in Series and Parallel_

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Order a loop rule attack

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Steps

Label the circuit
Use junction rule
Use the loop rule
Solve equations
Check the answers

Instructions

Tap the moves in the order you would work through an unknown current problem.

_Source: OpenStax College Physics, section 21.3 Kirchhoff's Rules_

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Match the meter to its job

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Matching pairs

Left
Voltmeter
Right
Measures voltage, wired in parallel
Left
Ammeter
Right
Measures current, wired in series
Left
Galvanometer
Right
Needle swings with the current in it
Left
Ohmmeter
Right
Applies volts, then computes R
Left
Potentiometer
Right
Null device for measuring an emf
Left
Wheatstone bridge
Right
Null device for finding a resistance

Instructions

Drag each instrument onto what it actually does.

_Source: OpenStax College Physics, section 21.4 DC Voltmeters and Ammeters_

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