Deck 37: Ohms Law

Question 1

If resistance is increased, current flow is ____________________.

Answer 1

decreased

Question 2

The lighting system of an automobile draws 6.7 amperes at a battery voltage of 11.5. Find the resistance of the lighting system to the nearest thousandth ohm.

A) 1.716
B) 1.856
C) 1.953
D) 2.037

Answer 2

1.716

Question 3

The total current flow in a parallel circuit is the ____.

A) quotient of the individual circuits with the greatest current flow
B) difference of the individual circuits with the greatest current flow
C) sum of the individual circuits
D) product of the individual circuits

Answer 3

sum of the individual circuits

Question 4

While starting the motor, 276 amperes are flowing. With a 12-volt battery, what is the resistance of the starting motor? Round to the nearest hundredth ohm.

A) 0.03
B) 0.04
C) 0.05
D) 0.06

Question 5

If voltage is increased, current flow is ____________________.

Question 6

Ohm's law states the relationship of pressure, current flow, and ____________________ in an electrical circuit.

Question 7

An automobile horn requires only 0.2 ampere. The resistance is 43 ohms. Find the voltage.

A) 8.3
B) 8.6
C) 8.9
D) 9.2

Question 8

Find the current flow (amperes) in a headlight circuit with 0.9 ohms resistance. The battery voltage is measured at 11.8 volts. Round to the nearest tenth.

A) 12.7
B) 12.8
C) 13.1
D) 13.5

Question 9

It should be noted that in a parallel circuit, the total resistance is ____ the lowest resistance in the circuit.

A) equal to
B) sometimes less than and sometimes greater than
C) always greater than
D) always less than

Question 10

In a series circuit, all of the resistances are ____ and then substituted in Ohm's law together to equal total resistance (R).

A) added together
B) multiplied together
C) subtracted from one
D) divided by the largest resistance