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ECNG1012 : Engineering Science and Technology (Semester I- 2024/2025)
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What steps must be taken to output a sine wave with a positive DC offset?i. Press button 1.ii. Press the square wave button in button group 3.iii. Press button 12. (Ensure that the button is down/depressed).iv. Rotate control knob 5 to the left.v. Rotate control knob 5 to the right.vi. Press the sine wave button in button group 3. 
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The following circuit was constructed in the lab on the breadboard shown below. Which of the wires shown is incorrect or unnecessary and should be removed?
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A resistor having a color code yellow, red, orange, and gold has resistor value between:
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The yellow wire is electrically connected to the green wire through the breadboard.
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With respect to the internal resistance of the voltmeter, the following statements are NOT true :
- The internal resistance of the voltmeter determines the accuracy of the voltage reading across the component.
- Voltmeters reduce the total resistance of the circuit, hence an internal resistance that is very low in comparison to the circuit, will give an accurate reading.
- False readings can occur due to the meter changing the circuit. If the voltmeter has a resistance that is too low in comparison to the component across which the voltage drop is to be measured, it will lower the net resistance of the circuit.
- Due to voltmeters being connected in parallel, they are not part of the circuit, hence they provide an accurate reading.
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A resistor was measured and its value was 3.6 kΩ . The color code of the resistor is orange, white, red and gold. Therefore, the measured value of the resistor is within its tolerance range.
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A non-ideal ammeter affects the circuit it is connected to by introducing a resistance into the circuit. This causes decrease in the current flowing through the circuit and hence causes the measured current value to be less than the actual current value.
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The yellow wire is electrically connected to the green wire through the breadboard.
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The yellow wire is electrically connected to the green wire through the breadboard.
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A non-ideal voltmeter affects the circuit it is connected to by drawing a current through it. This is an example of meter loading.
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