Canadian Basic pool, section 5-04

Basic

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Subelement 5

Basic Electronics and Theory

Section 5-04

Ohm's law - single resistors

5-04-01

If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor?

A.
48 volts
B.
52 volts
Correct Answer
C.
100 volts
D.
25 volts

5-04-01

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5-04-02

How is the current in a DC circuit calculated when the voltage and resistance are known?

Correct Answer
A.
Current equals voltage divided by resistance
B.
Current equals resistance multiplied by voltage
C.
Current equals resistance divided by voltage
D.
Current equals power divided by voltage

5-04-02

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5-04-03

How is the resistance in a DC circuit calculated when the voltage and current are known?

A.
Resistance equals current multiplied by voltage
Correct Answer
B.
Resistance equals voltage divided by current
C.
Resistance equals power divided by voltage
D.
Resistance equals current divided by voltage

5-04-03

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5-04-04

How is the voltage in a DC circuit calculated when the current and resistance are known?

A.
Voltage equals current divided by resistance
B.
Voltage equals resistance divided by current
C.
Voltage equals power divided by current
Correct Answer
D.
Voltage equals current multiplied by resistance

5-04-04

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5-04-05

If a 12-volt battery supplies 0.25 ampere to a circuit, what is the circuit's resistance?

A.
3 ohms
Correct Answer
B.
48 ohms
C.
12 ohms
D.
0.25 ohm

5-04-05

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5-04-06

Calculate the value of resistance necessary to drop 100 volts with current flow of .8 milliamperes:

Correct Answer
A.
125 kilohms
B.
125 ohms
C.
1250 ohms
D.
1.25 kilohms

5-04-06

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5-04-07

The voltage required to force a current of 4.4 amperes through a resistance of 50 ohms is:

Correct Answer
A.
220 volts
B.
2220 volts
C.
22.0 volts
D.
0.220 volt

5-04-07

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5-04-08

A lamp has a resistance of 30 ohms and a 6 volt battery is connected. The current flow will be:

A.
2 amperes
B.
0.5 ampere
C.
0.005 ampere
Correct Answer
D.
0.2 ampere

5-04-08

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5-04-09

What voltage would be needed to supply a current of 200 mA, to operate an electric lamp which has a resistance of 25 ohms?

Correct Answer
A.
5 volts
B.
8 volts
C.
175 volts
D.
225 volts

5-04-09

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5-04-10

The resistance of a circuit can be found by using one of the following:

Correct Answer
A.
R = E/I
B.
R = I/E
C.
R = E/R
D.
R = E X I

5-04-10

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5-04-11

If a 3 volt battery supplies 300 mA to a circuit, the circuit resistance is:

Correct Answer
A.
10 ohms
B.
9 ohms
C.
5 ohms
D.
3 ohms

5-04-11

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