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Test 117

Total questions: 47

Worksheet time: 40mins

Name
Class
Date
1.

Which one of the following is not possible in an electric circuit?

a)

  2. Current and no voltage

b)

  1. Voltage and no current

c)

  1. No voltage and no current

d)

  1. Voltage and current

2.

Which one of the following is not a type of energy source?

a)

  1. Battery

b)

  2. Solar Cell

c)

  1. potentiometer

d)

  2. Generator 

3.

The unit of energy is the?

a)

  1. Watt 

b)

  1. Coulomb 

c)

  1. Voltage

d)

  2. Joule 

4.

Potential difference in another term for Potential

a)

Charge

b)

  1.   

    Voltage 

c)

Energy  

d)

Distance of an electron term

5.

The Charge on a single electrons is 

a)

  2. 1.6  x 10^-19 C

b)

 

  1. 6.25 x 10^-18 C

c)

  2. 3.14 x 10^-6 C

d)

  1. 1.6 x 10-^-19 J

6.

When placed close together a positively charged material and a negatively charged material will?

a)

    1. Repel

b)

  1. Attract 

c)

  1. Exchange charges

d)

  2. Becomes neutral 

7.

Materials in which there is no current when voltage is applied are called

a)

  2. Semiconductors

b)

  1. Filisters

c)

  1. Conductors 

d)

  1.  

  2. Insulator's 

8.

Electron orbits are called



a)

waves


b)

valences


c)


 nuclei


d)


shells 


9.

A neutral atom with  an atomic number of three how many electrons?


a)


  1. 1

b)

  2. 3

c)

  2. None

  3.  

d)

  2. Depends on the type of atom 

10.

Express each quantity in engineering notation 5uA 43mV 275 k Ohms 10 MW

a)

  1. 5 µA (microamperes): ( 5 \times 10^{-6} ) A

  2. 43 mV (millivolts): ( 43 \times 10^{-3} ) V

  3. 275 kΩ (kiloohms): ( 275 \times 10^{3} ) Ω

  4. 10 MW (megawatts): ( 10 \times 10^{6} ) W

b)

  1. 5 µA (microamperes): ( 5 \times 10^{-3} ) A

  2. 43 mV (millivolts): ( 43 \times 10^{6} ) V

  3. 275 kΩ (kiloohms): ( 275 \times 10^{-3} ) Ω

  4. 10 MW (megawatts): ( 10 \times 10^{-9} ) W


c)

  1. 5 µA (microamperes): ( 5 \times 10^{3} ) A

  2. 43 mV (millivolts): ( 43 \times 10^{-6} ) V

  3. 275 kΩ (kiloohms): ( 275 \times 10^{9} ) Ω

  4. 10 MW (megawatts): ( 10 \times 10^{-3} ) W

d)

NONE

11.


If a GFCI breaker detects a difference in the hot line and neutral, the breaker should trip.


a)

True

b)

False

12.

The three basic measurements that can be done by a DMM are voltage, current and power.

a)

True

b)

False

13.

A circular mil is a unit of area.

a)

True

b)

False

14.

All circuits must have a completed path for current.

a)

True

b)

False

15.

A strain gauge changes resistance in response to an applied force.


a)

True

b)

False

16.

A rheostat performs the same function as the as a potentiometer 


a)

True

b)

False

17.


A resistor labeled Or 1 is ohm


a)

True

b)

False

18.

In a 5-Band precision resistor, the fourth band is the tolerance band.

a)

True

b)

False

19.


The unit of current is coulomb.


a)

True

b)

False

20.

A fuel cell combines

a)

True

b)

False

21.

A volt can be defined in terms of energy per charge

a)

True

b)

False

22.

Coulomb's law shows the relationship of the energy between two charges.

a)

True

b)

False

23.

Like charges repel 


a)

True

b)

False

24.

The unit of charge is ampere 


a)

True

b)

False

25.

Silicon and germanium are classed as insulators

a)

True

b)

False

26.


The outermost shell of an atom contains the valence electrons


a)

True

b)

False

27.

The number of protons in nucleus is the atomic number of that element

a)

True

b)

False

28.

  1. 5 µA (microamperes) remains 5 µA since it’s already in engineering notation.

  2. 43 mV (millivolts) remains 43 mV since it’s already in engineering notation.

  3. 275 kΩ (kiloohms) remains 275 kΩ since it’s already in engineering notation.

  4. 10 MW (megawatts) remains 10 MW since it’s already in engineering notation.

a)

True

b)

False

29.

A) 0.000345:

  • Move the decimal point three places to the right: ( 3.45 \times 10^{-4} ).

  • So, the result is 345 µ (micro).

B) 0.025:

  • Move the decimal point two places to the right: ( 2.5 \times 10^{-2} ).

  • So, the result is 25 m (milli).

C) 0.00000000129:

  • Move the decimal point nine places to the right: ( 1.29 \times 10^{-9} ).

  • So, the result is 1.29 n (nano)

a)

True

b)

False

30.

When reporting a measured value, it is okay to include 


a)

  1. The entire result as shown on a calculator 

b)

One uncertain digit

c)

Two digits to the right of the decimal place

d)

Three digits to the right of the decimal place

31.


The number of significant digits in 0.1050 is


a)

two   

b)

three

c)

Four

d)

Five

32.

Twenty million ohms can be expressed as

a)

20 mohms

b)

20 Mohms

c)

20 MW 

d)

20 uohms

33.

15,000 W is the same as

a)

15 mW 

b)

15kW

c)

15 MW

d)

p W

34.

In the SI System, the prefix k means to multiply the unit by

a)

100 

b)

1,000

c)

10,000

d)

  1. 1,000,000

35.

An mks measurements unit is one that 


a)

Can be expressed as a combination of the meter, kilogram and second

b)

Uses a supplement unit in its definition

c)

Is always a base Unit

d)

Includes all base units in its definition

36.


The number of Base units in the SI system is 


a)

6

b)

5

c)

7

d)

3

37.

The unit of current is 


a)

Volt

b)

watt

c)

Ampere

d)

Joule

38.


Which of the following is not an electrical quantity?


a)

  1. Current 

b)

  1.  Voltage 

c)

  1.     Power

d)

  1.   Time    

39.

Electrical current can be define as

a)

A) The reciprocal of resistance

b)

B) The rate of flow charge

c)

C)The energy required to move charge

d)

D) the charge on free electronics

40.

There is no current in a circuit when

a)

A) a switch is closed

b)

B) a switch is open

c)

C) there is no voltage

d)

D) answers a and c

e)

E) answers b and c

41.

In a _____ circuit, if one light bulb goes out, all light bulbs will go out.

a)

parallel

b)

series

c)

partial

d)

closed

42.

The primary purpose of a resistor is to

a)

A) Increase current

b)

B) produce heat

c)

C) limit current

d)

D) resist current change

43.


Wire resistance depends on the 

a)

Type of material 

b)

  1. Cross -sectional area 

c)

  2. Length of wire

d)

  1. All of these

44.

Potentiometers and rheostats are types of

a)

  1. Circuit breakers

b)

  2. Fixed resistors 

c)

  1. Voltage sources

d)

  1. Variable resistors 

45.

The current in a given circuit is not exceed 22 A. Which value fuse is the best?

a)

  1. A) 10 A

b)

  1. B) 25 A

c)

  1. C)20 D

d)

a fuse is not necessary.

46.

If the Vi curve for a larger value resistor is plotted on the same plot, the slope of the line will

a)

A) increase

b)

B) decreases

c)

C) remain the same

47.

If R is changed to a larger value and the voltmeter reading stays at 150 V, current

a)

A) Increases

b)

B) Decreases

c)

C) Stays the same

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