** Basic Electrical Special MCQ Part Four**

**1.An ideal voltage source has**

a. Zero internal resistance

b. Infinite internal resistance

c. A load-dependent voltage

d. A load-dependent current

**Answer-A**

**2.A real voltage source has**

a. Zero internal resistance

b. Infinite internal resistance

c. A small internal resistance

d. A large internal resistance

**Answer-C**

**3.If a load resistance is 1k ohm, a stiff voltage source has a resistance of**

a. At least 10 ohm

b. Less than 10 ohm

c. More than 100 kohm

d. Less than 100 kohm

**Answer-B**

**4.An ideal current source has**

a. Zero internal resistance

b. Infinite internal resistance

c. A load-dependent voltage

d. A load-dependent current

**Answer-B**

**5.A real current source has**

a. Zero internal resistance

b. Infinite internal resistance

c. A small internal resistance

d. A large internal resistance

**Answer-D**

**6.If a load resistance is 1 kohm, a stiff current source has a resistance of**

a. At least 10 ohm

b. Less than 10 ohm

c. More than 100 kohm

d. Less than 100 kohm

**Answer-C**

**7.The Thevenin voltage is the same as the**

a. Shorted-load voltage

b. Open-load voltage

c. Ideal source voltage

d. Norton voltage

**Answer-B**

**8.The Thevenin resistance is equal in value to the**

a. Load resistance

b. Half the load resistance

c. Internal resistance of a Norton circuit

d. Open-load resistance

**Answer-C**

**9.To get the Thevenin voltage, you have to**

a. Short the load resistor

b. Open the load resistor

c. Short the voltage source

d. Open the voltage source

**Answer-B**

**10.To get the Norton current, you have to**

a. Short the load resistor

b. Open the load resistor

c. Short the voltage source

d. Open the current source

**Answer-A**

**11.The Norton current is sometimes called the**

a. Shorted-load current

b. Open-load current

c. Thevenin current

d. Thevenin voltage

**Answer-A**

**12.An open resistor has**

a. Infinite current through it

b. Zero voltage across it

c. Infinite voltage across it

d. Zero current through it

**Answer-D**

**13.A shorted resistor has**

a. Infinite current through it

b. Zero voltage across it

c. Infinite voltage across it

d. Zero current through it

**Answer-B**

**14.An ideal voltage source and an internal resistance is an example of the**

a. Ideal approximation

b. Second approximation

c. Higher approximation

d. Exact model

**Answer-B**

**15.Treating a connecting wire as a conductor with zero resistance is an example of the**

a. Ideal approximation

b. Second approximation

c. Higher approximation

d. Exact model

**Answer-A**

**16.The voltage out of an ideal voltage source**

a. Is zero

b. Is constant

c. Depends on the value of load resistance

d. Depends on the internal resistance

**Answer-B**

**17.The current out of an ideal current source**

a. Is zero

b. Is constant

c. Depends on the value of load resistance

d. Depends on the internal resistance

**Answer-B**

**18.Thevenin’s theorem replaces a complicated circuit facing a load by an**

a. Ideal voltage source and parallel resistor

b. Ideal current source and parallel resistor

c. Ideal voltage source and series resistor

d. Ideal current source and series resistor

**Answer-C**

**19.Norton’s theorem replaces a complicated circuit facing a load by an**

a. Ideal voltage source and parallel resistor

b. Ideal current source and parallel resistor

c. Ideal voltage source and series resistor

d. Ideal current source and series resistor

**Answer-B**

**20.One way to short a device is**

a. With a cold-solder joint

b. With a solder bridge

c. By disconnecting it

d. By opening it

**Answer-B**