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DC circuit

Total questions: 62

Worksheet time: 5hrs 10mins

Name
Class
Date
1.

What is the equivalent or total resistance (Re) across this circuit?

a)

3 kΩ

b)

10 kΩ

c)

13 kΩ

d)

18 kΩ

2.
Which resistor will prevent the most current flow?
a)
1 ohm
b)
100 ohms
c)
1000 ohms
d)
0.5k ohms
3.
How does resistance affect current?
a)
less resistance - less current
b)
more resistance - less current
c)
more resistance - more current
d)
resistance does not affect current
4.
Power  = ?
a)
Current
b)
Voltage
c)
Current X Voltage
d)
Current / Voltage
5.
Comparing branches in a parallel circuit:
a)
the voltage is the same in all branches
b)
the voltage depends on the resistance
c)
the resistance depends on the voltage
d)
the resistance is the same in all branches
6.
Comparing series vs parallel circuits:
a)
Series: voltage changes, current is constant
b)
Series: Current changes, voltage is constant
c)
Parallel: both voltage AND current change
d)
Parallel: neither voltage nor current change
7.
Increasing the number of branches in a parallel circuit ...
a)
... increases the total resistance
b)
... decreases the total resistance
c)
... makes no difference to the total resistance
8.
Every time the number of components in a series circuit increases,
a)
... the current decreases more
b)
... the current increases more
c)
... the voltage increases more
9.
Comparing 2 bulbs in series vs 2 bulbs in parallel:
a)
Brighter in series because they share the current
b)
Brighter in parallel because the current is higher
c)
Brighter in series because there is less electricity
10.

Power outlets in your home are arranged ...

a)

In series so that it's simpler

b)

In parallel so that they all receive the same current

c)

In parallel so that they all receive the same voltage

11.
What does the battery / cell provide?
a)
Voltage
b)
Current
c)
Resistance
12.
Suppose you have a 100. ohm resistor parallel to two 100. ohm resistors in series. what is their total resistance?
a)
66.7 ohms
b)
300. ohms
c)
69.69 ohms
d)
 600. ohms
13.

resistance?

a)

1/rtot = (1/5) + (1/8) + (1/3) Ω

b)

120 Ω

c)

2.5189873 Ω

d)

1/rtot = (1/5) * (1/8) * (1/3) Ω

14.
What is I1-?
a)
2 A
b)
4 mA
c)
1.33 mA
d)
1.33 A
15.
What is VR2-?
a)
4 V
b)
8 V
c)
6 V
d)
2 V
16.
What is VR1-?
a)
4 V
b)
6 V
c)
8 V
d)
2 V
17.
What is I2-?
a)
2 mA
b)
4 A
c)
1.33 mA
d)
1.33 A
18.

What is the purpose of a resistor?

a)

allow current flow

b)

control current flow

c)

prevent current flow

d)

allow heat to build up

19.

The unit to measure the resistivity of a wire is

a)

ohms

b)

Volt

c)

ohms.m

d)

ohms.s

20.

The total current through this circuit is

a)

0.02 amps

b)

0.09 amps

c)

50 amps

d)

9 amps

21.

As the resistance of a circuit increases, the current will...

a)

increase

b)

decrease

c)

stay the same

22.

These are...

a)

Capacitors

b)

Diodes

c)

Resistors

d)

Transistors

23.
a)
resistor
b)
photo resistor
c)
variable resistor
d)
photo switch
24.

Resistor

a)
b)
c)
d)
25.

Ohms

a)
b)
c)
d)
26.

What is the name of an object that opposes to electrity?

a)

Circuit

b)

Resistance

c)

Electron

d)

Current

27.
The symbol for voltage is: 
a)
Vo
b)
V
c)
W
d)
Amp
28.
Current is measured in:
a)
Ohms
b)
Voltage
c)
Amperes
d)
Watts
29.
An expression for the overall power in a circuit is: 
a)
watts
b)
voltage
c)
current
d)
resistance
30.
If you have three 1.5V batteries in series, what would be total voltage be? 
a)
3.4 V
b)
4.5 V
c)
1.5 V
d)
3 V
31.

The circuit diagram shows a 4.0 Ω resistor and an 8.0 Ω resistor connected to a 6.0V battery. What is the current in the battery?

a)

0.50A

b)

0.75A

c)

1.50A

d)

2.00A

32.

A 3.0 Ω resistor and a 6.0 Ω resistor are connected in parallel.What is their combined resistance?

a)

0.50Ω

b)

2.0Ω

c)

4.5Ω

d)

9.0Ω

33.

The circuit diagram shows a 4.0 Ω resistor and an 8.0 Ω resistor connected to a 6.0V battery.What is the current in the 8.0 Ωresistor?

a)

0 A

b)

0.50A

c)

0.75A

d)

1.0A

34.

A 30 Ω resistor is connected in series with another resistor and a 6.0 V battery. The current in the circuit is 0.12 A. A voltmeter is connected across the other resistor. What is the reading on the voltmeter?

a)

2.4 V

b)

3.6 V

c)

6.0 V

d)

9.6 V

35.

A circuit contains four ammeters A, B, C and D, and three resistors with different values. Which ammeter shows the largest reading?

a)

A

b)

B

c)

C

d)

D

36.

Which one of the following resistors connected in parallel with a 24 Ω would give a total resistance of 8 Ω

a)

16 Ω

b)

12 Ω

c)

8 Ω

d)

6 Ω

37.

40 lamps, each of resistance 8 are connected in series with a 240 V supply, in order to decorate a tree. The current in each lamp is

a)

2.0 A

b)

0.75 A

c)

1.0 A

d)

1.33 A

38.

¿Cuál es la expresión correcta para las corrientes del siguiente nudo? (1ª Ley de Kirchhoff)

a)

I1+I2=I3+I4

b)

I1=I2+I3-I4

c)

I1+I3=I2+I4

d)

I1-I3=I2-I4

39.

"The sum of all voltage drops in a series circuit equals the total applied voltage." This is know as what?

a)

Ohm's Law

b)

Kirchhoff's Voltage Law

c)

Kirchhoff's Current Law

d)

Bolen's Law

40.

"The total current in a parallel circuit equals the sum of the individual branch currents."

a)

Ohm's Law

b)

Kirchhoff's Voltage Law

c)

Kirchhoff's Current Law

d)

Bolen's Law

41.

Three resistances 20 Ω, 30 Ω and 60 Ω are connected in parallel, their

combined resistance is given by

a)

110 Ω

b)

50 Ω

c)

20Ω

d)

10 Ω

42.

Combined resistance of 5 Ω and 10 Ω are connected in series is equal to

a)

10 Ω

b)

15 Ω

c)

20 Ω

d)

25 Ω

43.

Two 10 Ω resistors are connected in parallel, their equivalent resistance is

a)

5 Ω

b)

10 Ω

c)

15 Ω

d)

0.5 Ω

44.
Current is...
a)
moving protons
b)
moving electrons
c)
measured in volts
d)
measured in ohms
45.
Resistance is...
a)
What "slows down" electrons
b)
What "speeds up" electrons
c)
Moving electrons
d)
What "pushes" electrons
46.
Voltage is simply defined as...
a)
what 'pushes' electrons
b)
what 'stops' electrons
c)
moving electrons
47.
The symbol for 1 _____ is A
a)
acceleration
b)
current
c)
ampere
d)
coulomb
48.
___________ wires keep electrons on course & protect us from the dangerous flow of electricity. 
a)
Insulated
b)
Conducted
49.

In the following formula, what represents the charge?

a)

Fe

b)

q

c)

E

50.

Does friction cause heat?

a)

Yes

b)

No

51.

Ammeters should always be connected in (a)   .

52.

In a series circuit, if one component breaks the others will remain on.

a)

True

b)

False

53.

Voltmeters should always be connected in (a)   around a component.

54.

Potential difference is another word for (a)   .

55.

Factors increasing resistance

a)

the length of the wire

b)

the thickness of the wire

c)

the temperature of the wire

56.

What does a voltmeter measure?

a)

Current

b)

Voltage

c)

Resistance

57.

What does an ammeter measure?

a)

Current

b)

Voltage

c)

Resistance

58.

How does an ammeter is added in the circuit?

a)

Series

b)

Parallel

59.

How does a voltmeter meter is added in the circuit?

a)

Series

b)

Parallel

60.

Which component has the highest resistance?

a)

1

b)

2

61.

The reading on the voltmeter is

a)

3 V

b)

6 V

c)

12 V

d)

Can not answer as need to know the resistance of the bulb.

62.

Choose right option

a)
b)
c)
d)

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