A 200
B 1 k
C 2 k
D 4 k

A 10 mA
B 30 mA
C 60 mA
D 90 mA

# Q3: If voltage across a resistance doubles

A the current is halved
B the resistance doubles
C the current is unchanged
D none of the above

A 0.04 V
B 2.5 V
C 25.0 V
D 10,000 V

# Q5: If the voltage across a fixed value of resistance is increased five times, what does the current do?

A It increases by a factor of five.
B It decreases by a factor of five.
C It stays the same.
D Not enough information

# Q6: Power supplies differ from batteries in that

A power supply output voltages are ac and not dc
B power supply voltages are not stable
C power supplies are low-current devices
D None of the above

# Q7: A damaged resistor

A may appear burned
B may have an increased resistance value
C may be checked with an ohmmeter
D All of the above

# Q8: If the resistance in a circuit with constant voltage increases, the current will

A increase
B decrease
C stay the same
D Not enough information

# Q9: Energy is defined as the ability to

A produce heat
B produce light
C All of the above

A 3.92 kW
B 280 W
C 28.6 W
D 9.8 W

A 32 W
B 80 W
C 500 W
D 16 kW

# Q12: "Half-splitting" is

A a means for nuclear fuel cells to produce electricity
B a means of isolating a problem in a circuit
C a means for reducing a high ac voltage to a low dc voltage
D a means of limiting current in a circuit

# Q13: Power supplies are regulated to prevent the output voltage from changing due to changes in the

A line voltage
C frequency
D both line voltage and supply load

# Q14: If current through a resistance is halved

A the resistance is halved
B the voltage is halved
C the voltage doubles
D none of the above

A 43.75
B 70
C 43,750
D 70,000

# Q16: Ohm's law describes the mathematical relationship between

A ohms, kilohms, and megohms
B resistor size and resistor value
C resistance, voltage, and current
D none of the above

A current
B energy
C power
D voltage

A 3.6 W
B 35 W
C 175 W
D 245 W

# Q19: If doubling the voltage across a resistor doubles the current through the resistor then

A the resistor value decreased
B the resistor value did not change
C the resistor value increased
D it is impossible to determine the change in the resistor value

# Q20: Ohm's law is a relationship between

A voltage, current, and time
B power, current, and resistance
C resistance, time, and current
D voltage, current, and resistance

# Q21: A battery's capacity to deliver power is measured in

A kWh
B Ah
C Wh
D Vh

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