NCCER Electrical (intro to electrical
circuits) Exam Questions and Answers
a circuit has a source voltage of 50v and a current of 10A, what is the power in watts? -
Answer-500w
voltage is defined as the? - Answer-driving force that makes current flow in a circuit
if a circuit has 12 amps of current and the resistance is 20 ohms, the applied voltage is?
- Answer-240 volts
if two 10 ohm resistors are connected in series, what is the total resistance of the
resistors? - Answer-20 ohms
to make sure the voltage is turned off before touching any terminals, use a? - Answer-
voltage tester
how many amos are there in the current of a circuit if the voltage source is 140v and the
resistance is 2 omhs - Answer-70
materials with electrical characteristics that fall between those of insulators and
conductors are considered? - Answer-semiconductors
what is the applied voltage if the current in a circuit is 60 amps and the resistance is 10
ohms - Answer-600 volts
which of the following is used to step voltage down to lower levels before it reaches a
home or office? - Answer-transformers
a 5ohm and 20 ohm resistor are connected in parallel, what is the total resistance of
these two resitors? - Answer-4 ohms
if the resitors of a circuit is 20 ohms and the current is 10 amps, the power in watts is? -
Answer-2500 watts
if a circuit has 48 amps of current and applied voltage of 240 volts, the resistance is? -
Answer-50 ohms
you would measure resistance with a? - Answer-ohm meter
which of the following substances is considered a good semiconductor. - Answer-silicon
in a parallel circuit, the voltage drop? - Answer-is the same across all loads
circuits) Exam Questions and Answers
a circuit has a source voltage of 50v and a current of 10A, what is the power in watts? -
Answer-500w
voltage is defined as the? - Answer-driving force that makes current flow in a circuit
if a circuit has 12 amps of current and the resistance is 20 ohms, the applied voltage is?
- Answer-240 volts
if two 10 ohm resistors are connected in series, what is the total resistance of the
resistors? - Answer-20 ohms
to make sure the voltage is turned off before touching any terminals, use a? - Answer-
voltage tester
how many amos are there in the current of a circuit if the voltage source is 140v and the
resistance is 2 omhs - Answer-70
materials with electrical characteristics that fall between those of insulators and
conductors are considered? - Answer-semiconductors
what is the applied voltage if the current in a circuit is 60 amps and the resistance is 10
ohms - Answer-600 volts
which of the following is used to step voltage down to lower levels before it reaches a
home or office? - Answer-transformers
a 5ohm and 20 ohm resistor are connected in parallel, what is the total resistance of
these two resitors? - Answer-4 ohms
if the resitors of a circuit is 20 ohms and the current is 10 amps, the power in watts is? -
Answer-2500 watts
if a circuit has 48 amps of current and applied voltage of 240 volts, the resistance is? -
Answer-50 ohms
you would measure resistance with a? - Answer-ohm meter
which of the following substances is considered a good semiconductor. - Answer-silicon
in a parallel circuit, the voltage drop? - Answer-is the same across all loads
