Voltage

Question 1

What test equipment would you use to verify there are 0 volts in a circuit?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Oscilloscope

Answer 1

B. Voltmeter

Question 2

Three resistors, all 100 ohms with 9 volts in a parallel circuit. What is the voltage drop across the 2nd resistor?
A. 9 V
B. 3 V
C. 6 V
D. 0 V

Answer 2

A. 9 V

Question 3

Four resistors, R1 = 15 ohms, R2 = 22 ohms, R3 = 40 ohms, R4 = 1k ohms. What is the voltage drop of the 3rd resistor if the current is .015A in a series circuit?
A. 0.3 V
B. 0.9 V
C. 0.6 V
D. 1.2 V

Answer 3

C. 0.6 V

Question 4

Electron flow is______to______and Conventional flow is______to______.
A. Negative to Positive & Positive to Negative
B. Positive to Negative & Negative to Positive
C. Positive to Positive & Negative to Negative
D. Negative to Negative & Positive to Positive

Answer 4

A. Negative to Positive & Positive to Negative

Question 5

What symbol represents current?
A. R
B. V
C. I
D. P

Answer 5

C. I

Question 6

Ohm’s Law is the relationship of______,______and______.
A. Current, Resistance, and Power.
B. Volts, Amps, and Ohms.
C. Watts, Joules, and Coulombs.
D. Energy, Charge, and Resistance.

Answer 6

B. Volts, Amps, and Ohms.

Question 7

Three resistors where R1 = 15, R2 = 50, and R3 = 100 are all connected to a 25V battery in a Parallel circuit. Find the current across:
IR, IR2, and IR3.
A. R1 = 1.5 A, R2 = 0.45 A, R3 = 0.2 A
B. R1 = 1.6 A, R2 = 0.48 A, R3 = 0.24 A
C. R1 = 1.7 A, R2 = 0.52 A, R3 = 0.26 A
D. R1 = 1.667 A, R2 = 0.5 A, R3 = 0.25 A

Answer 7

D. R1 = 1.667 A, R2 = 0.5 A, R3 = 0.25 A

Question 8

What will the current be in the circuit?
A. 1.5 A
B. 2.5 A
C. 2 A
D. 3 A

Answer 8

C. 2 A

Question 9

Which law states “Sum of the total voltage drops will equal source voltage”?
A. Kirchhoff’s Law
B. Ohm’s Law
C. Faraday’s Law
D. Newton’s Law

Answer 9

A. Kirchhoff’s Law

Question 10

Which of the following is the symbol for voltage?
A. I/R
B. P/Q
C. E/V
D. C/L

Answer 10

C. E/V

Question 11

Ohm’s Law is the relationship between:
A. Current, resistance, and capacitance
B. Power, voltage, and resistance
C. Energy, current, and resistance
D. Volts, amps, and ohms

Answer 11

D. Volts, amps, and ohms

Question 12

What will the resistance of a CLOSED switch be?
A. High or Maximum
B. Zero or Very little
C. Moderate or Variable
D. Infinite or Very high

Answer 12

B. Zero or Very little

Question 13

What kind of resistor is in the schematic below?
A. Variable Resistor
B. Fixed Resistor
C. Thermistor
D. Photoresistor

Answer 13

A. Variable Resistor

Question 14

What will the tolerance be if there is NO COLOR?
A. 5%
B. 10%
C. 20%
D. 1%

Answer 14

C. 20%

Question 15

Which of the following is NOT a parallel circuit characteristic?
A. The voltage across each component is the same.
B. The total resistance is less than the smallest resistance.
C. If one component fails, others can still operate.
D. The current stays the same through each of the loads.

Answer 15

D. The current stays the same through each of the loads.

Question 16

Which of the following is NOT a series circuit characteristic?
A. The current is the same through all components.
B. The source voltage stays constant among the loads.
C. The total resistance is the sum of individual resistances.
D. Voltage is divided among the components.

Answer 16

B. The source voltage stays constant among the loads.

Question 17

The symbol of current is?
A. V
B. R
C. I
D. P

Answer 17

C. I

Question 18

If a Voltmeter reads 0 Volts, what kind of fault is that?
A. Open
B. Short
C. Ground
D. Overload

Answer 18

B. Short

Question 19

What will the total resistance be of four 100-ohm resistors in a SERIES circuit?
A. 100 ohms
B. 200 ohms
C. 25 ohms
D. 400 ohms

Answer 19

D. 400 ohms