Practical electrical and electronic circuits

1

Which of the following describes this circuit?

Circuit with a battery and lamp, plus two open switches connected in parallel.

2

Which of the following describes this circuit?

Circuit with a battery and switch, plus two resistors connected in parallel.

3

What is the correct reading on meter V1 in the following circuit?

The lamps are identical.

Circuit with a battery connected in series with an ammeter reading 0.1 A, a lamp, another ammeter labelled A1, another lamp and a final ammeter labelled A2. A voltmeter connected across the battery reads 6 V, and there are voltmeters connected across each lamp, labelled V2 and V2.

4

What is the correct reading on meter A1 in the following circuit?

The lamps are identical.

Circuit with a battery connected in series with an ammeter reading 0.1 A, a lamp, another ammeter labelled A1, another lamp and a final ammeter labelled A2. A voltmeter connected across the battery reads 6 V, and there are voltmeters connected across each lamp, labelled V2 and V2.

5

What is the correct reading on meter A2 in the following circuit?

The lamps are identical.

Circuit with a battery connected in series with an ammeter reading 0.1 A, a lamp, another ammeter labelled A1, another lamp and a final ammeter labelled A2. A voltmeter connected across the battery reads 6 V, and there are voltmeters connected across each lamp, labelled V2 and V2.

6

What is the correct reading on meter V3 in the following circuit?

The lamps are identical.

Circuit with a battery and ammeter in series, connected to two parallel branches each containing a lamp and ammeter. The ammeter next to the battery reads 2 A and a voltmeter connected across the battery reads 6 V. The other two ammeters are labelled A3 and A4. There is a voltmeter connected across each lamp, labelled V3 and V4 respectively.

7

What is the correct reading on meter A3 in the following circuit?

The lamps are identical.

Circuit with a battery and ammeter in series, connected to two parallel branches each containing a lamp and ammeter. The ammeter next to the battery reads 2 A and a voltmeter connected across the battery reads 6 V. The other two ammeters are labelled A3 and A4. There is a voltmeter connected across each lamp, labelled V3 and V4 respectively.

8

What does a motor convert electrical energy into?

9

Which component is required in a circuit containing an LED?

10

A manufacturer states that, for a certain LED, the maximum voltage across the LED is 3 V and current must not exceed 12 mA.

What is the series resistance required to protect this LED if a 9 V battery is used to power the circuit?

11

What does the symbol shown here represent?

A circuit symbol consisting of a horizontal line broken by a long rectangle with a diagonal line through it. One end of the diagonal line has an extra portion angled off, parallel to the horizontal.

12

When does a microphone produce a voltage?

13

What is the voltage across the 500 Ω resistor?

Circuit with 9 V battery, 1 kilo-ohm resistor and 500 ohm resistor connected in series.

14

When does a bipolar transistor switch on?

15

How would you describe the transistor in this circuit?

Two 10k-ohm resistors in series between 3V and 0V rails, base of bipolar transistor fed from point between them. 500 ohm resistor joins 3V rail and collector. Emitter connected directly to 0V rail