# 35 Lecture

## PHY301

### Midterm & Final Term Short Notes

## Load voltage and current

Load voltage and current are essential concepts in circuit theory that are used to understand the behavior of electrical circuits.

**Important Mcq's**

Midterm & Finalterm Prepration

Past papers included

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**What is load voltage?**

A. The voltage across a load

B. The voltage supplied to a load

C. The voltage dropped across a resistor

D. The voltage across a capacitor

**Answer: A. The voltage across a load**

**What is load current?**

A. The current flowing through a load

B. The current supplied to a load

C. The current flowing through a resistor

D. The current flowing through a capacitor

**Answer: A. The current flowing through a load**

**What is the relationship between voltage, current, and resistance?**

A. V = IR

B. I = RV

C. R = VI

D. V = I/R

**Answer: A. V = IR**

**What is the power consumed by a load with a voltage of 10V and a current of 2A?**

A. 5W

B. 10W

C. 15W

D. 20W

**Answer: D. 20W (P = VI = 10V x 2A = 20W)**

**What is a resistive load?**

A. A load that stores and releases electrical energy

B. A load that produces heat or light

C. A load that is easy to pass current through

D. A load that is difficult to pass current through

**Answer: B. A load that produces heat or light**

**What is a reactive load?**

A. A load that produces heat or light

B. A load that is easy to pass current through

C. A load that stores and releases electrical energy

D. A load that is difficult to pass current through

**Answer: C. A load that stores and releases electrical energy**

**For a capacitive load, what is the phase difference between load voltage and current?**

A. 0 degrees

B. 45 degrees

C. 90 degrees

D. 180 degrees

**Answer: C. 90 degrees**

**For an inductive load, what is the phase difference between load voltage and current?**

A. 0 degrees

B. 45 degrees

C. 90 degrees

D. 180 degrees

A**nswer: C. 90 degrees**

**What is a multimeter used for?**

A. Measuring voltage, current, and resistance

B. Measuring only voltage

C. Measuring only current

D. Measuring only resistance

**Answer: A. Measuring voltage, current, and resistance**

**What is an oscilloscope used for?**

A. Displaying the voltage waveform over time

B. Measuring only voltage

C. Measuring only current

D. Measuring only resistance

**Answer: A. Displaying the voltage waveform over time**

**Subjective Short Notes**

Midterm & Finalterm Prepration

Past papers included

Download PDF
**What is load voltage?**

**Answer:** Load voltage refers to the voltage that is present across a load, which is typically a resistor, capacitor, or inductor.

**What is load current?**

**Answer**: Load current is the current that flows through a load, which is determined by the resistance of the load and the voltage across it.

**What is Ohm's Law?**

**Answer: **Ohm's Law states that the voltage across a resistor is proportional to the current flowing through it. Mathematically, this can be expressed as V = IR, where V is the voltage across the resistor, I is the current flowing through it, and R is the resistance of the resistor.

**How is power consumed by a load calculated?**

**Answer: **The power consumed by a load can be calculated using the equation P = IV, where P is the power consumed, I is the current flowing through the load, and V is the voltage across the load.

**What is a resistive load?**

**Answer:** A resistive load is a device or component that resists the flow of electrical current and produces heat or light, such as incandescent light bulbs and heating elements.

**What is a reactive load?**

**Answer:** A reactive load is a device or component that stores and releases electrical energy, such as capacitors and inductors.

**What is the phase difference between load voltage and current for a capacitive load?**

**Answer:** For capacitive loads, the load voltage leads the load current by 90 degrees.

**What is the phase difference between load voltage and current for an inductive load?**

**Answer:** For inductive loads, the load current leads the load voltage by 90 degrees.

**What are multimeters used for?**

**Answer:** Multimeters are devices that measure voltage, current, and resistance, and are used to troubleshoot circuits and diagnose problems.

**What are oscilloscopes used for?**

**Answer: **Oscilloscopes are devices that display the voltage waveform over time and are used to measure the characteristics of electrical signals, such as their frequency and amplitude.