Ahmed takes circuit $b$ apart and makes a new circuit $d$ . The two lamps are now connected in parallel with each other and the cell.
Draw a diagram of circuit $d$ . Label each of the lamps as ' $1$ ' or ' $2$ '.

Important Questions on Electrostatics and Electric Currents

EASY

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 9 - Electrostatics and Electric Currents>Exercise 4>Q 8

Which of these statements shows the correct relationship between the voltage of the cell and the voltages across lamps $1$ and $2$ ?
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EASY

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 9 - Electrostatics and Electric Currents>Exercise 4>Q 9

Blessy uses circuit to test the relationship between the voltage across the cell and the voltages across each lamp.

Write a method for Blessy's investigation. Assume that Blessy has only one voltmeter.

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HARD

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 9 - Electrostatics and Electric Currents>Exercise 4>Q 10

Blessy extends her investigation to include circuit $b$ . She also decides to measure the current in each lamp and the cell. Here is a partly completed table of results.

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Use your knowledge of current, voltage and also series and parallel circuits to complete the table of results with the values you would expect to observe.