Question 1:

The correct way to connect ammeters and voltmeters in a circuit is:

Ammeter: series
Voltmeter: parallel

So the best choice is C: series for the ammeter and parallel for the voltmeter.

• Ammeter: Measures current and must be connected in series with the circuit.
• Voltmeter: Measures voltage and must be connected in parallel with the component across which the voltage is measured.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 2:

The statement that best explains what an 'ohmic' conductor is:

A. A conductor where the current through it is directly proportional to the potential difference.

Ohmic conductors follow Ohm's Law, which states that the current (I) is directly proportional to the voltage (V) across it, provided the temperature and material properties remain constant.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 3:

Q3: Which of the above networks has the highest resistance?

• Diagram D (3 resistors in series) has the highest resistance. For resistors in series, the total resistance is the sum of the individual resistances. Thus, for three 12Ω resistors in series:

  Rtotal=R1+R2+R3=12Ω+12Ω+12Ω=36Ω

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 4:

The formula for resistors in parallel is:

1/R_total = 1/R₁ + 1/R₂ + 1/R₃ ......

For three 12Ω resistors in parallel:

1/R_total = 1/12 + 1/12 + 1/12 = 3/12

Therefore

Thus, Diagram C has a resistance of 4 ohms.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 5:

To find the power lost as heat in the resistor and the current flowing through it, we can use Ohm’s Law and the power formula.

Current (I) can be calculated using Ohm's Law:

I= V/R

where
V=12V and
R=3Ω:

I= 12/3 =4A

Power (P) can be calculated using the formula:

P=I²×R

Substituting the value of I=4A and R = 3Ω:

P=4² x 3 = 16 x 3

=48W

Thus, the correct values are:

Power (W): 48
Current (A): 4
The correct choice is C: 48W and 4A.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 6:

The statement that best describes ideal ammeters and voltmeters is:

D. Ammeters should have zero resistance, voltmeters should have infinite resistance.

• Ammeters: Ideally, they should have zero resistance to avoid affecting the current in the circuit they are measuring.
• Voltmeters: Ideally, they should have infinite resistance to prevent drawing any current from the circuit, ensuring accurate voltage measurements.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 7:

*All the AI bots used got very confused and got this one wrong, even when the graph was described!
The answer is just the value of V/I, as Ohms law does not need the change in V divided by the change in I shown by 1/(gradient). So any answer referencing the gradient is wrong. This is an IB favorite!

The answer is A , the value of V/I.

*The Silverback

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 8:

To find the total resistance of the circuit with two 4Ω resistors in parallel connected to a 1Ω resistor in series, we can follow these steps:

Step 1: Calculate the equivalent resistance of the two 4Ω resistors in parallel.
The formula for resistors in parallel is:

1/R_total = 1/R₁ + 1/R₂ + 1/R₃ ......

For two 4Ω resistors:

1/R_total = 1/4 + 1/4

so 1/R_total = 2/4 =1/2

R_total =2Ω

Step 2: Add the equivalent parallel resistance to the 1Ω resistor in series.
Now, we add the 2Ω (from the parallel resistors) to the 1Ω resistor:

=2Ω+1Ω=3Ω which is answer B.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 9:

To find the current flowing through the network from a 6V cell, we can use Ohm's Law, which states:

I= V/R

Given:
Voltage =6V
Total resistance = R=3Ω (calculated previously)

Substituting the values into Ohm's Law:

I= 6/3 =2A

(answer C).

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 10:

To find the potential difference (p.d.) across the 1Ω resistor, we can use Ohm's Law:

V=I×R
Given:
Current I=2A (calculated previously)
Resistance R=1Ω

Step 1: Calculate the potential difference
Substituting the values into the formula:

V=2A×1Ω=2V

Conclusion
The potential difference across the 1Ω resistor is 2 V, so the correct answer is B. 2 V.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.