In a rather complicated looking circuit, there are several lamps, LED's and LDR For each LED decide whether or not it will light up. Mark each LED that lights up with a tick .

LED is a diode, which will light up if its P side is connected to the positive terminal of the battery and the N side to the negative terminal of the battery. Hence the LED that will light up is shown with a tick. LED s are marked with arrows directed away.

In a rather complicated looking circuit, there are several lamps, LED's and LDR's For each lamp decide whether or not it will light up. Mark each Lamp that lights up with a tick .

LED and LDR are diodes, which will light up if its P side is connected to the positive terminal of the battery and the N side to the negative terminal of the battery. Lamps that will light up are shown by a Tick mark. Lamp will glow only when the circuit is complete and the current flows through them. Current direction is shown by arrows.

E M B I B E

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.2>Q 1

EASY

Upper Secondary-IGCSE

IMPORTANT

Earn 100

Draw a diode in a circuit with a cell and a lamp so that current will flow.

Important Questions on Electrical Circuits

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.1>Q 3

Using the symbols of basic electronic circuits, for a variable potential divider.Draw a circuit that allows the potential difference across a lamp to be varied from

0 V t o 12 V .

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.1>Q 4

The figure shown below is a potential divider. The potential difference across $R_{1}$ is $8 V$ Calculate the ratio of $R_{1} : R_{2}$ .

Question Image

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.2>Q 2

Why might a diode be a good idea in a circuit ?

HARD

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.2>Q 3

In a rather complicated looking circuit, there are several lamps, LED's and LDR

Question Image

For each LED decide whether or not it will light up. Mark each LED that lights up with a tick .

HARD

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.2>Q 3

In a rather complicated looking circuit, there are several lamps, LED's and LDR's

Question Image

For each lamp decide whether or not it will light up. Mark each Lamp that lights up with a tick .

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.4>Q 2

Explain why we sometimes connect cells in parallel?

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.6>Q 1

Many countries do not allow light switches or power sockets to be fitted in bathrooms. Explain why is the case.

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.6>Q 7

Someone is operating an electric hedge cutter whilst standing on wet grass. The cable is cut by accident. Explain why it is unlikely that a fuse will save the life of the operator.

Learn and Prepare for any exam you want !

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