IGCSE Physics Paper 6

(a) The metre rule is clamped in position near to the spring. (i) Write down the scale readings in mm from the metre rule at the top and bottom of the spring, as shown in Fig. 1.1.

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​Some text here about the topic of discussion.

​top reading = ............................... mm bottom reading = .....................mm [2]

Open Ended

(a) The metre rule is clamped in position near to the spring. (i) Write down the scale readings in mm from the metre rule at the top and bottom of the spring, as shown in Fig. 1.1.​

top reading = ............................... mm,(439 OR 4.93)

bottom reading = .....................mm (454 OR 5.45 )[2]

Multiple Choice

(a) The metre rule is clamped in position near to the spring. (i) Write down the scale readings in mm from the metre rule at the top and bottom of the spring, as shown in Fig. 1.1.​

top reading = ............................... mm,

bottom reading = .....................mm [2]

• top reading: 439

  bottom reading: 454

• top reading: 4390

  bottom reading: 454

(a) The metre rule is clamped in position near to the spring. (ii) Using the two readings, calculate the length l₀ of the spring in mm. Record l₀ in Table 1.1. The value l₀ is the length of the spring when the load L = 0.00 N. [1]

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​Some text here about the topic of discussion.

​Some text here about the topic of discussion.

(a) The metre rule is clamped in position near to the spring. (b) The student suspends a load L = 0.20 N from the spring. He records the new length l of the spring in Table 1.1. (i) Use the equation e = (l – l₀) to calculate the extension e of the spring. Record the value of e in Table 1.1. [1]

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​Some text here about the topic of discussion.

((ii) Complete the extension column heading in Table 1.1. [1]

((c) The student repeats the procedure using loads L = 0.40 N, L = 0.60 N, L = 0.80 N and L = 1.00 N. He records the readings and results in Table 1.1. Plot a graph of e/mm (y-axis) against L/ N (x-axis).

​Some text here about the topic of discussion.

((d) Fig. 1.2 shows the unstretched spring and the spring with a load. On Fig. 1.2, show clearly the distances l₀, l and e [2]

(a) She measures the potential difference (p.d.) VX across the resistor X and the current I_X in the circuit. The meters are shown in Fig. 2.2 and Fig. 2.3.

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(i) Write down the readings. Include the units for potential difference, current or resistance where appropriate in all parts of the question

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​Some text here about the topic of discussion.

Open Ended

V_x =

I_x =

R_x =

Open Ended

State and explain whether R_X and R_Y can be considered to be equal within the limits of experimental accuracy.

Multiple Choice

State and explain whether R_X and R_Y can be considered to be equal within the limits of experimental accuracy.

• No, the values are too different

• Yes, the values are the same

Draw

(c) The student connects a resistor Z in parallel with resistor X. She connects the voltmeter to record VXZ, the potential difference across the parallel combination of resistor X and resistor Z. Draw the circuit diagram for this arrangement. Label the resistors X, Y and Z

Open Ended

R_xz =

Multiple Choice

Answer:

R_xz =

• 2.2 Ω

• 12.2 Ω

Open Ended

(e) Another student does this experiment using a set of three identical resistors. His results show that, within the limits of experimental accuracy, the combined resistance of two identical resistors connected in series is four times the combined resistance of the same two resistors connected in parallel. To test whether his results are true for other values of resistance, he does the same procedure with other sets of three identical resistors. Suggest the values of resistance he could use to reach a conclusion during a 1 hour practical lesson

Open Ended

Just Read!

When finished typ

(a) The student places the metre rule on the pivot at the 50.0 cm mark. He places an object Q on the metre rule with its centre at the 90.0 cm mark. He places a load of weight P = 2.0 N on the metre rule and adjusts the position of the load so that the metre rule is as near as possible to being balanced. He measures the distance x from the centre of the load to the pivot. He repeats the procedure using loads of weight P = 3.0 N, 4.0 N, 5.0 N and 6.0 N. All the values of P and x are recorded in Table 1.1

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​Calculate, and record in Table 1.1, the values of

Open Ended

Calculate, and record in Table 1.1, the values of $$\frac{1}{x}$$   [2]

Open Ended

the values of $$\frac{1}{x}$$  

(c) In this experiment, x_max , the maximum possible value for x is 50.0 cm. Calculate 1/ x_max .

(Write the answer on the next slide)​

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​Some text here about the topic of discussion.

Use the graph to determine the minimum value of P required to balance the metre rule in this experiment. Show clearly on the graph how you determined this value.

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Multiple Choice

(c) In this experiment, x_max , the maximum possible value for x is 50.0 cm. Calculate 1/ x_max .

• 0.02 cm

• 2 cm

Multiple Choice

(d) In this experiment, the width of object Q is slightly greater than the width of the metre rule. Explain briefly how you would place the object Q as accurately as possible on the 90.0 cm mark of the metre rule. You may draw a diagram.

• Put the object Q with its centre of mass as close to the mid point of the width and the 90 .0 cm mark of the rule as possible

• Just simply put

Multiple Choice

(e) In this experiment, it is difficult to determine the exact position of the load that will make the metre rule balance.(i) Explain briefly why this is difficult.

• Difficult to obtain balance point

• Difficult to obtain balance rule

Multiple Choice

(e) In this experiment, it is difficult to determine the exact position of the load that will make the metre rule balance.(ii) Explain briefly how you would find the best position of the load that will make the metre rule balance.

• Slowly moved the load with care forward and backward until it is at a point nearest to balance the object

• Quickly moved the load with force forward and backward until it is at a point that may balance the object

5(a) (i) Record the potential difference V1 across the lamp L 1 , as shown on the voltmeter in Fig. 2.2

Read only, write answer in next slide

Fill in the Blank

V_{1 =}

Fill in the Blank

(ii) Record the current I₁ in the circuit, as shown in Fig. 2.3.

Multiple Choice

(iii) Calculate the resistance R₁ of the filament of lamp L ₁ . Use the equation R₁ = $$\frac{V_1}{I_1}$$  . Include the unit (V₁ = 3.5v, I₁ =0.38A)

• 9.21

• 9.21 Ω

• 9.21 A

• 9.21 V

Read only, write answer in next slide

Multiple Choice

R₂ =

• 5.7

• 5.7 Ω

• 5.7 A

• 5.7 V

Multiple Choice

R₃ =

• 4.6

• 4.6 Ω

• 4.6 A

• 4.6 V

Multiple Choice

R₁ = 9.21

R₂ = 5.7

R₃ = 4.6

R₁ + R₂ + R₃ =

• 20 Ω

• 20 Ω

• 4.6 Ω

• 19.51 Ω

Draw

(e) Draw a circuit diagram to show the circuit used in part (b) with all three lamps connected in series