Learn more about our help with Assignments: Electric Circuits
Search & Filtering
Electric Circuits
The figure shows an application for an opamp device. R2 = 10kΩ, R1 = 1kΩ.
An input signal of 3V is applied to the input, V1.
If +12V and -12V are used for the supply rails what would the value of the signal at the output be?
An input signal of 3V is applied to the input, V1.
If +12V and -12V are used for the supply rails what would the value of the signal at the output be?
Electric Circuits
A temperature sensor produces an output of 100mV at 20°C and 200mV at 40°C.
The non-inverting configuration of the op-amp (shown below) is to be used.
The values of the Resistors used are such that the output voltage at 20°C will now be 1.1V.
What would the voltage of the output signal of the op-amp circuit be if the temperature around the sensor was now 40°C?
The non-inverting configuration of the op-amp (shown below) is to be used.
The values of the Resistors used are such that the output voltage at 20°C will now be 1.1V.
What would the voltage of the output signal of the op-amp circuit be if the temperature around the sensor was now 40°C?
Electric Circuits
You are required to specify the power rating of a resistor, R1, to be used in a car engine management system, so that an order can be placed for the component (resistor).
The resistance required is 2Ω. The maximum current that will be flowing in the resistor will be 10A.
This resistor is only available in the following power ratings - Choose the most appropriate power rating for this resistor for the given application.
The resistance required is 2Ω. The maximum current that will be flowing in the resistor will be 10A.
This resistor is only available in the following power ratings - Choose the most appropriate power rating for this resistor for the given application.
Electric Circuits
You are required to specify the power rating of a resistor, R1, to be used in a car engine management system, so that an order can be placed for the component (resistor).
The resistance required is 2Ω. The maximum current that will be flowing in the resistor will be 10A.
This resistor is only available in the following power ratings - Choose the most appropriate power rating for this resistor for the given application.
The resistance required is 2Ω. The maximum current that will be flowing in the resistor will be 10A.
This resistor is only available in the following power ratings - Choose the most appropriate power rating for this resistor for the given application.
Electric Circuits
In investigating an existing design of a circuit, it was found that a 25Ω resistor disspates 9W.
The engineer decides to put a 12.5Ω resistor in series with this 25Ω resistor.
What is the power dissipation now in the 25Ω resistor with the same supply voltage after the 12.5Ω resistor was added?
(clue - determine what the supply voltage is from the given information. Then you can either use the voltage divider theory to find the voltage now dropped across the 25Ω and then work out the power, or you can calculate the total current now drawn by both resistors and then work out the power across the 25Ω resistor!
The engineer decides to put a 12.5Ω resistor in series with this 25Ω resistor.
What is the power dissipation now in the 25Ω resistor with the same supply voltage after the 12.5Ω resistor was added?
(clue - determine what the supply voltage is from the given information. Then you can either use the voltage divider theory to find the voltage now dropped across the 25Ω and then work out the power, or you can calculate the total current now drawn by both resistors and then work out the power across the 25Ω resistor!
Electric Circuits
A different temperature sensor produces an output of 100mV at 10°C and 400mV at 40°C
What voltage would it produce at a temperature of 20°C?
What voltage would it produce at a temperature of 20°C?
Electric Circuits
A temperature sensor produces an output of 100mV at 20°C and 200mV at 40°C
You are required to design a circuit using an opamp using the non-inverting configuration so that the output voltage at 20°C will now be 1.1V.
What values of R1 and R2 would be required?
You are required to design a circuit using an opamp using the non-inverting configuration so that the output voltage at 20°C will now be 1.1V.
What values of R1 and R2 would be required?
Electric Circuits
A diode allows current to flow in one direction only.
Consider the case when the anode is connected to the positive end of a power supply via a resistor and the cathode to the negative terminal of the same power supply.
Which of the following statements is true about the diode for this particular case? (click on all statements that are true - there could be more than one correct answer!).
1.The diode is in reverse bias
2.The diode is in Forward bias
3.The diode conducts
4.The diode does not conduct
Consider the case when the anode is connected to the positive end of a power supply via a resistor and the cathode to the negative terminal of the same power supply.
Which of the following statements is true about the diode for this particular case? (click on all statements that are true - there could be more than one correct answer!).
1.The diode is in reverse bias
2.The diode is in Forward bias
3.The diode conducts
4.The diode does not conduct
Electric Circuits
A circuit has a voltage source that delivers 6 V and the circuit uses 3 W of power. What is the resistance of the load?"
what is the value of the resistance?
what is the value of the resistance?
Electric Circuits
An electronic engineer needs a particular value of capacitance for his new design for the car courtesy light to dim at a particular rate when the car is locked remotely using a wireless key.
He needs a capacitance of exactly 12 µF. Which of the four possibilities will give him that value?
1.Two capacitors in parallel, each of value 24 µF
2.Two capacitors in series, one of value 4 µF and the other of value 2 µF.
3.Two capacitors in series, each of value 6 µF
4.Two capacitors in parallel, each of value 6 µF
He needs a capacitance of exactly 12 µF. Which of the four possibilities will give him that value?
1.Two capacitors in parallel, each of value 24 µF
2.Two capacitors in series, one of value 4 µF and the other of value 2 µF.
3.Two capacitors in series, each of value 6 µF
4.Two capacitors in parallel, each of value 6 µF
