OHM'S LAW QUIZ

Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k of resistance?

590 mA

27.2 mA

59 mA

5.9 mA

TRUE ANSWER : ?
YOUR ANSWER : ?

Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?

4

4 k

4.4

400

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the voltage source for a circuit carrying 2 A of current through a 36 resistor?

18 V

7.2 V

1.8 V

72 V

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?

82

8.2

820

8.2 k

TRUE ANSWER : ?
YOUR ANSWER : ?

When there is 12 mA of current through a 1.2 k resistor, the voltage across the resistor is

1.4 V

10 V

14.4 V

100 V

TRUE ANSWER : ?
YOUR ANSWER : ?

A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, orange, silver?

2 mA

214 mA

2.2 mA

21.4 mA

TRUE ANSWER : ?
YOUR ANSWER : ?

The formula to find I when the values of V and R are known is

V = IR

I = VR

I = V/R

I = R/V

TRUE ANSWER : ?
YOUR ANSWER : ?

The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately

1.2

18

11.2

112

TRUE ANSWER : ?
YOUR ANSWER : ?

How much resistance is required to limit the current from a 12 V battery to 3.6 mA?

33 k

2.2 k

22 k

3.3 k

TRUE ANSWER : ?
YOUR ANSWER : ?

When 12 V are applied across a 68 resistor, the current is

816 mA

8.16 mA

176 mA

17.6 mA

TRUE ANSWER : ?
YOUR ANSWER : ?

↑