Quiz 3 For Unit Exam

16 Questions | By Rebullman | Last updated: Mar 18, 2022 | Total Attempts: 83

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Electrical Circuits

Questions and Answers

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.
  
  Across the load
- 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.
  
  A passion pink carrying case that matches your shoes