WorksheetsIntroduction to Electrical Circuits NCCER
Total questions: 18
Worksheet time: 9mins
Name
Class
Date
1.
if two 10 ohm resistors are connected in series, what is the total resistance of the resistors?
a)
19 ohms
b)
2 ohms
c)
25 ohms
d)
20 ohms
2.
what is the applied voltage if the current in a circuit is 60 amps and the resistance is 10 ohms
a)
590 volts
b)
600 volts
c)
605 volts
d)
500 volts
3.
electric charge is measured in?
a)
Coulombs
b)
ohm meter
c)
50 ohms
d)
other electrons
4.
you would measure resistance with a?
a)
is the same across all loads
b)
Coulombs
c)
ohm meter
d)
voltage tester
5.
an electronic repels?
a)
0.001 inch
b)
semiconductors
c)
Coulombs
d)
other electrons
6.
how many amos are there in the current of a circuit if the voltage source is 140v and the resistance is 2 omhs
a)
500w
b)
600 volts
c)
70
d)
+-20
7.
if a curcuit has 12 amps of current and the resistance is 20 ohms, the applied voltage is?
a)
241 volts
b)
240 volts
c)
230 volts
d)
1200 volts
8.
in a parallel circuit, the voltage drop?
a)
other electrons
b)
voltage tester
c)
is the same across all loads
d)
ohm meter
9.
to make sure the voltage is turned off before touching any terminals, use a?
a)
2500 watts
b)
240 volts
c)
voltage tester
d)
semiconductors
10.
a circuit has a source voltage of 50v and a current of 10A, what is the power in watts?
a)
2500w
b)
500w
c)
50w
d)
490w
11.
a 5ohm and 20 ohm resistor are connected in parallel, what is the total resistance of these two resitors?
a)
4 ohms
b)
14 ohms
c)
9 ohms
d)
8 ohms
12.
if the resitors of a circuit is 20 ohms and the current is 10 amps, the power in watts is?
a)
2600 watts
b)
2499 watts
c)
2500 watts
d)
2510 watts
13.
if a circuit has 48 amps of current and applied voltage of 240 volts, the resistance is?
a)
40 ohms
b)
5 ohms
c)
25 ohms
d)
50 ohms
14.
which of the following substances is considered a good semiconductor.
a)
silicon
b)
50 ohms
c)
20 ohms
d)
transformers
15.
a resitor has no further band, this indicates that the resitor tolerance is?
a)
+- 80
b)
+-20
c)
+-21
d)
+-40
16.
materials with electrical characteristics that fall between those of insulators and conductors are considered?
a)
240 volts
b)
transformers
c)
semiconductors
d)
voltage tester
17.
which of the following is used to step voltage down to lower levels before it reaches a home or office?
a)
20 ohms
b)
semiconductors
c)
transformers
d)
silicon
18.
a mil is equal to?
a)
1.1 inch
b)
0.001 inch
c)
0.4 inch
d)
0.6 inch
100 %
