Download Voltage and Current in series and parallel circuits

Unit 2- Energy and Electricity - Electric Charge and Voltage
National 4 Physics
Voltage and Current in series and parallel circuits
1. What electrical component does each of these symbols represent?
A
2. Redraw this circuit to show how you would attach a voltmeter to measure
the voltage across the bulb and an ammeter to measure the current in the
circuit.
3. Calculate the current at the given points in each series circuit.
(a)
0.4 A
I1
(b)
I2
I2
I1
M
6.5 A
4. In an experiment, two identical resistors are connected in parallel to a
power supply which has 3.2A drawn from it. Calculate the current through
each resistor.
3.2 A
I1
I2
Unit 2- Energy and Electricity - Electric Charge and Voltage
National 4 Physics
5. Calculate the current at the given points in each parallel circuit.
0.15 A
(a)
1.6 A
(b)
0.10 A
0.7 A
I
I1
I2
6. Calculate the voltage across the resistor in each of these series circuits.
1.5 V
(a)
12 V
(b)
8.5 V
0.6 V
V
V
M
7. Calculate the voltage across the resistor in each of these series circuits.
1.5 V
12 V
(b)
(a)
V
0.6 V
8.5 V
M
V
Unit 2- Energy and Electricity - Electric Charge and Voltage
National 4 Physics
8. a) Draw a circuit to show three bulbs attached in parallel to a 9 volt battery.
b) What is the voltage across each bulb?
9. a) Draw a circuit to show three identical bulbs attached in parallel to a 6 volt
battery. The ammeter across the battery shows 12A.
b) What is the current for each bulb?
10. Calculate the voltage across each light bulb in a parallel circuit below.
6V
11. What are the readings on voltmeter V1 and ammeter A1?
6V
1.5 A
A1
2V
V1
12. a) What is the reading on ammeter A1?
b) What is the voltage across each bulb?
12 V
5.0 A
A1
2.2 A
Unit 2- Energy and Electricity - Electric Charge and Voltage
National 4 Physics
13. Calculate the missing currents and voltages in these parallel circuits.
12 V
1.5 A
(a)
1.5 V
I5
V1
I1
I2
0.45
A
(b)
V1
10 Ω
0.5
A
I5
V2
10 Ω
I3
V2
I4
I4
V3
10 Ω
I1
I2
I3
14. Calculate the missing currents and voltages in these series circuits.
1.6mA
(a)
V
I3
I1
1V
I2
2V
1.2 V
(b)
I1
I3
0.5 A
0.45 V
V
I2