# Quiz 3 For Unit Exam

16 Questions | Total Attempts: 83  Settings  Electrical Circuits

• 1.
A flow of electrons from one atom to another is called
• A.

Voltage

• B.

Current

• C.

Charge

• D.

Inductance

• 2.
The unit of measure used to express the difference in the number of charges at two physically different points in a circuit is the:
• A.

Volt

• B.

Coulomb

• C.

Ampere

• D.

Siemens

• 3.
The minimum amount of  current that could potentially kill a human is usally suggested to be:
• A.

1 mA

• B.

15 mA

• C.

500 mA

• D.

1 A

• 4.
Which of the following is NOT a form of Ohm's Law?
• A.

I=VR

• B.

R=V/I

• C.

V=IR

• D.

I=V/R

• 5.
The milliampere has a value that is:
• A.

One million times larger than a microampere

• B.

One thousand times larger than an ampere

• C.

One millionth of an ampere

• D.

One thousandth of an ampere

• 6.
In any electrical circuit, an increase in current flow is created when:
• A.

The source voltage is decreased

• B.

The resistance is increased

• C.

The resistance is decreased

• D.

Either C or D above

• 7.
What is the quantity of heat, in watts given off when a 5 ohm resistor has 10 volts applied to its terminals?
• A.

20

• B.

50

• C.

250

• D.

500

• 8.
A series ciruit has a current flow of 50 mA and its resistance is 100 ohms.  The source voltage is:
• A.

5 V

• B.

20 V

• C.

500 V

• D.

2 V

• 9.
When a EMF of 2KV is applied to a 0.15 M ohm resistance, the current flow will be about:
• A.

830 mA

• B.

133 mA

• C.

83 mA

• D.

13 mA

• 10.
An electrical appliance has 300 ohms of resistance.  What is its current flow when connected to a 120 V source
• A.

25 mA

• B.

25 A

• C.

400 mA

• D.

None of the above

• 11.
The rule for voltage drops in series circuit is:
• A.

The sum of the voltage drops equals the applied voltage

• B.

All voltage drops are equal

• C.

The smallest resistance has the largest voltage drop.

• D.

The voltage drop across the largest resistance equals the applied V.

• 12.
A series circuit consists of 7 lamps of equal value. When one lamp filament fails (burns out) and is "open" the rest:
• A.

Will stay lit

• B.

Will not stay lit

• C.

Will also fail and be "open"

• D.

None of these

• 13.
If the applied voltage is increased in a series circuit:
• A.

The total resistance will decrease and current will stay the same

• B.

Current and resistance will both increase

• C.

Current will increase and the resistance will stay the same

• D.

Current and resistance will both decrease

• 14.
With two equal resistances in series across a 90 volt battery, the voltage across each resistor equals:
• A.

30 Volts

• B.

45 Volts

• C.

90 Volts

• D.

180 Volts

• E.

It is impossible to determine the voltages unless the resistor values are known.

• 15.
An ammeter should always be connected
• A.

• B.

In series with ground

• C.

In series with the part of the circuit under test

• D.

In parallel with the power source

• 16.
An ideal voltmeter would have
• A.

A very low resistance

• B.

A very high resistance

• C.

Zero resistance

• D.

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