# Parallel Circuit Analysis MCQ Questions

Parallel Circuit analysis MCQ Questions.

## Parallel Circuit analysis MCQ#1

Consider the circuit given below and then answer the questions provided below:

### Equivalent resistance Example

What is equivalent resistance of circuit:

1. 2k ohm
2. 6k ohm
3. 10k ohm
4. 15k ohm

Req = 1/(1/R1 + 1/R2) = 1/(1/10 + 1/15) = 6k ohm

### Find current across R1

The current across resistor R1 is:

1. 1 mA
2. 2 mA
3. 5 mA
4. 10 mA

You can use Ohm’s law: I =V/R = 20/10 kohm = 2 mA

OR alternatively you can use current divider rule

### Find current across R2

The current across resistor R2 is:

1. 1.33 mA
2. 5 mA
3. 13.44 mA
4. 25.8 mA

Solution: From Ohm’s Law: I = V/R = 20/15k = 1.33 mA

### Find total incoming current

What is value of It:

1. 1.33 mA
2. 2 mA
3. 3.33 mA
4. None of the above

Solution: There are two methods that can be used

By directly Using Ohm’s law:

I = V/Req = 20 V/6k = 3.33 A

OR use Ohm’s law to find individual currents (as we did earlier) and then use Kirchoff’s current law to find equivalent resistance.

### Find power consumed by R1

What is total power consumed by R1:

1. 10 mW
2. 20 mW
3. 30 mW
4. 40 mW

Formula:

P = V2/R = (20)2/10k = 400/10k = 40 mW

### Find power consumed by R2

What is total power consumed by R2:

1. 6.66 mW
2. 16.66 mW
3. 26.66 mW
4. 36.66 mW

Formula:

P = V2/R = (20)2/15k = 400/15k = 26.66 mW

### Find power delivered by Voltage source

Find total power delivered by voltage source:

1. 35 mW
2. 60 mW
3. 66.66 mW
4. None of the above