Title: Concepts of Electricity/Ohms Law Test
Course: Electrical Theory (IC 101-IC 101) > Section: Assessments

Q: A 330 ohm resistor dissipates 2 Watts. The voltage is
- 2.57 Volts
- 660 Volts
- 6.6 Volts
- 25.7 Volts
A: 2.57 Volts

Q: A neutral atom with an atomic number of three has how many electrons?
- 1
- 3
- none
- depends on the type of atom
A: 1

Q: A resistance of 2.2M ohms is connected across a 1K Volt source. The resulting current is appoximatedly
- 2.2m Amps
- 455u Amps
- 45.5u Amps
- 0.455 Amps
A: 2.2m Amps

Q: All circuits must have a complete path for current.
- True
- False
A: True

Q: Electrical current is defined as
- free electrons
- the rate of flow of free electrons
- the energy required to move electrons
- the charge on free electrons
A: free electrons

Q: If the total resistance of a circuit increases, current decreases.
- True
- False
A: True

Q: Materials in which current cannot be established are called
- filters
- conductors
- insulators
- semiconductors
A: filters

Q: Ohm's Law for finding resistance is R= I/V.
- True
- False
A: False

Q: Ohm's Law states that
- current equals voltage times resistance
- voltage equals current times resistance
- resistance equals current divided by voltage
- voltage equals current squared times resistance
A: current equals voltage times resistance

Q: Potential difference is another term for
- energy
- voltage
- distance of an electron from the nucleus
- charge
A: energy

Q: Te three basic measurements that can be done by a DMM are voltage, current, and power.
- True
- False
A: False

Q: Ten milliamperes can be expressed as
- 10M amps
- 10u amps
- 10K amps
- 10m amps
A: 10M amps

Q: The current of 250u Amps through a 4.7K ohm resistor produces a voltage drop of
- 53.2 Volts
- 1.175m Volts
- 18.8 Volts
- 1.175 Volts
A: 53.2 Volts

Q: The current in an electric circuit is inversely proportional to the amount of resistance in that circuit.
- True
- False
A: True

Q: The current produced in an electric circuit is inversely proportional to the amount of voltage in that circuit.
- True
- False
A: False

Q: The primary purpose of a resistor is to
- increase current
- limit current
- produce heat
- resist current change
A: increase current

Q: The quantity 4.7 X 10^3 is the same as
- 470
- 4700
- 47,000
- 0.0047
A: 470

Q: The unit of current is
- volt
- watt
- ampere
- joule
A: volt

Q: The unit of resistance is
- ampere
- henry
- hertz
- ohm
A: ampere

Q: There is no current in a circuit when
- a series switch is closed
- a series switch is open
- there is no source voltage
- both a and c
- both b and c
A: a series switch is closed

Q: When a voltage across a resistor is doubled, the current will
- triple
- half
- double
- not change
A: triple

Q: When there are 10m Amps of current through a 1.0K ohm resistor, the voltage across the resistor is
- 100 Volts
- 0.1 Volts
- 10K Volts
- 10 Volts
A: 100 Volts

Q: Which of the following is not an electrical quantity?
- current
- voltage
- time
- power
A: current

Q: Which one of the following is generally not a possible condition in an electric circuit?
- voltage and no current
- current and no voltage
- voltage and current
- no voltage and no current
A: voltage and no current

Q: How much energy is consumed by a TV set that draws 1 amp from the 120 volt power line during a time period of 6 hours?
A: 720W

Q: How much money does it cost to operate an electric heater for 8 hours that is rated at 1500 watts?  (9 cents/kwh)
A: $1.08

Q: The power dissipated in a resistance is 1 watt as 1000 microamperes of current flows through the resistance. What voltage is present across the resistance?
A: 1KV

Q: Symptom: The ammeter reading is zero, and the voltmeter reading is 10V.
- R is shorted.
- R is open
- The voltage source is faulty.
A: R is shorted.

Q: Symptom: The ammeter reading is zero, and the voltmeter reading is 0V.
- R is open.
- R is shorted.
- The voltage source is turned off or faulty.
A: R is open.

Q: Symptom: The ammeter reading is 1mA, and the voltmeter reading is 10V.
- The voltmeter is defective.
- The resistor value is higher than it should be.
- The resistor value is lower than it should be.
A: The voltmeter is defective.