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Ch 6 Electricity Review

Total questions: 52

Worksheet time: 34mins

Name
Class
Date
1.
If a positive charge is on the right side of the object, what will the charge arrangement look like after a time?
a)
A
b)
B
c)
C
d)
D
2.
What are the charges of these two pieces of laundry after coming out of the dryer? *<br />What are the charges of these two pieces of laundry after coming out of the dryer? *<br />
a)
Same
b)
Opposite
3.
Determine the direction of the electric force acting on the balloon on the right.
a)
To the left
b)
To the right
4.

Calculate the voltage different in a circuit that has a resistance of 24 Ω. if the current is 0.50 A.

(a)  

5.
Is this circuit in parallel or series?
a)
Parallel
b)
Series
6.
Is this circuit in parallel or series?
a)
Parallel
b)
Series
7.
Identify the type of circuit that is most common in household wiring.
a)
Parallel
b)
Series
8.

A TV with a power rating of 200 W uses 0.8 kWh of electrical energy in one day. For how many hours was the TV on during this day?

(a)  

9.

Calculate the current into a desktop computer plugged into a 120-V outlet if the power used is 180 W

(a)  

10.

Estimate the monthly cost of using a 700-W refrigerator that runs for 10 h a day if the cost per kWh is 0.20. (Answer to the nearest dollar.)

(a)  

11.

A flashlight bulb uses 2.4 W of power when the current in the bulb is 0.8 A. What is the voltage difference supplied by the batteries?

(a)  

12.

A hair dryer has a power of 1200 W. How much electrical energy does the hair dryer use in 3 minutes?

(a)  

13.

An electric light is plugged into a 120 V outlet. If the current in the bulb is 0.50 A, how much electrical energy does the bulb use in 15 minutes?

(a)  

14.

A circuit breaker is tripped when the current in the circuit is greater than 15 A. If the voltage difference is 120 V, what is the power being used when the circuit breaker is tripped?

(a)  

15.
31. A(n) ______ is a circuit with only one path for current to follow.
a)
law of conservation of charge
b)
voltage difference
c)
static electricity
d)
series circuit
e)
resistence
16.
32. An accumulation of excess electric charge is…
a)
law of conservation of charge
b)
voltage difference
c)
static electricity
d)
series circuit
e)
resistence
17.
33. The electrical force that makes charge flow in a circuit is related to the…
a)
law of conservation of charge
b)
voltage difference
c)
static electricity
d)
series circuit
e)
resistence
18.
34. According to the ________, electrc charge cannot be created or destroyed
a)
law of conservation of charge
b)
voltage difference
c)
static electricity
d)
series circuit
e)
resistence
19.
35. As ________ increases current decreases.
a)
law of conservation of charge
b)
voltage difference
c)
static electricity
d)
charging by contact
e)
resistence
20.
36. Charging a balloon by rubbing it on wool is an example of _______
a)
law of conservation of charge
b)
voltage difference
c)
static electricity
d)
charging by contact
e)
resistence
21.
37. Which is a conductor?
a)
class
b)
wood
c)
copper
d)
plastic
22.
38. Resistance in wires…
a)
increases current.
b)
destroys energy in a circuit
c)
converts electrical energy to other forms of energy.
d)
converts other forms of energy to electrical energy
23.
39. The electric force between two charged objects depends on which of the following?
a)
their masses and their separation
b)
their speeds
c)
their charges and their separation
d)
their masses and their charges
24.
40. The object shown is a…
a)
resistor
b)
battery
c)
circuit breaker
d)
fuse
25.
41. Which does not provide a significant voltage difference in a circuit?
a)
wet cell
b)
wires
c)
electrical outlet
d)
dry cell
26.
42. A commonly used unit for electrical energy is the…
a)
kilowatt-hour
b)
ampere
c)
ohm
d)
newton
27.
43. Which is the rate at which appliances convert electrical energy into other forms of energy?
a)
electrical power
b)
electric current
c)
resistance
d)
voltage
28.
44. Which correctly expresses the relationship between voltage, current, and resistance
a)
V = I / R
b)
V = IR
c)
V = R/I
d)
V = I+R
29.
45. Which correctly expresses the relationship between voltage, current, and electrical power?
a)
A) P = I + V
b)
B) P = IV
c)
C) P = I/V
d)
D) P = V/I
30.
47.a
a)
circuit
b)
voltage difference
c)
resistance
d)
battery
31.
47b
a)
circuit
b)
voltage difference
c)
resistance
d)
battery
32.
47c
a)
circuit
b)
voltage difference
c)
resistance
d)
battery
33.
47d
a)
circuit
b)
voltage difference
c)
resistance
d)
battery
34.
47e
a)
conductors
b)
insulators
c)
fuse
d)
resistor
35.
47f
a)
conductors
b)
insulators
c)
fuse
d)
resistor
36.

51. What is the current through the circuit shown above?

(a)  

37.

52. A toy car with a resistance of 20 Ω is connected to a 3-V battery. What is the current in the car?

(a)  

38.

54. A calculator uses a 9-V battery and draws 0.1 A of current. What is the power of the calculator?

(a)  

39.
STP Q1
a)
A
b)
B
c)
C
d)
D
40.
STP Q2
a)
A
b)
B
c)
C
d)
D
41.
STP Q3
a)
A
b)
B
c)
C
d)
D
42.
STP Q4
a)
A
b)
B
c)
C
d)
D
43.
STP Q5
a)
A
b)
B
c)
C
d)
D
44.
STP Q6
a)
A
b)
B
c)
C
d)
D
45.
STP Q7
a)
A
b)
B
c)
C
d)
D
46.
STP Q8
a)
A
b)
B
c)
C
d)
D
47.
STP Q9
a)
A
b)
B
c)
C
d)
D
48.

STP Q10

(a)  

49.

STP Q11

(a)  

50.

STP Q12

(a)  

51.

STP Q13

(a)  

52.
STP Q14
a)
increases current.
b)
decreases current

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