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Practice Questions



This activity contains 25 questions.

Question 1.
A 1.5 volt battery is connected to a voltmeter with infinite internal resistance. The voltage read is


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Question 2.
A 1.5 volt battery is connected to a voltmeter with infinite internal resistance. The 1.5 volt battery is next checked with a voltmeter which has an internal resistance of only 500 ohms on the scale being used. If the meter reads 1.1 volts, you can conclude


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Question 3.
Five volts is applied to two 2 ohm resistors in series. The resulting current is


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Question 4.
Five volts is applied to two 2 ohm resistors connected in parallel. The resulting current is


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Question 5.
Six volts is applied to a 2 ohm resistor in series with two 2 ohm resistors connected in parallel. The current through the first resistor is


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Question 6.

What is the equivalent resistance to the three resistors on the left in the above figure?


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Question 7.

What is the current drawn from the battery in the circuit?


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Question 8.

What is the current through the 20 ohm resistor on the left in the figure?


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Question 9.
What is the voltage drop across the three resistors on the left in the circuit in the above question?


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Question 10.

What is the voltage drop across the 20 ohm resistor in the circuit?


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Question 11.
In the above question what is the current through the upper 10 ohm resistor?


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Question 12.

What is the current through the 20 ohm resistor above?


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Question 13.

Which of the following equations is Kirchhoff's first rule as applied to the above circuit?


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Question 14.
Which of the following is not a legitimate application of Kirchhoff's second rule to the circuit in the previous question?


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Question 15.
What is I1 in the circuit in Question 13?


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Question 16.
What is I3 in the circuit in Question 13?


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Question 17.

What is the equivalent capacitance of the two capacitors in series in the figure?


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Question 18.
What is the charge on the 30 microF capacitor in the circuit in Question 17?


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Question 19.
What is the voltage across C2 (above)?


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Question 20.
You have three capacitors C1= 15 pF, C2= 35 pF and C3= 50 pF. How can you arrange them to get an equivalent capacitance of 25 pF?


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Question 21.


Close the switch in the above circuit by pressing the button below and find the time constant of the circuit.
t= secondsV= volts

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Question 22.
If the capacitor in the circuit in the above question is 3 microF, what is the resistance?


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Question 23.
What is the energy stored in the capacitor at t = 10 seconds.


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Question 24.


The above circuit is discharged by closing the switch. What is its time constant?
t= secondsV= volts

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Question 25.
If the resistance in the circuit in Question 24 is 1000 ohms, what is the capacitance?


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