# Ohm’s Law Mcqs

Q1. If 750 µA is flowing through 11 k ohms  of resistance, what is the voltage drop across the resistor?
A.8.25 V
B.82.5 V
C.14.6 V
D.146 V

Q2. The formula to find I when the values of V and R are known is
A.I = VR
B.I = R/V
C.V = IR
D.I = V/R

Q3. 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?
A.2 mA
B.2.2 mA
C.214 mA
D.21.4 mA

Q4. Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k Ohms of resistance?
A. 27.2 mA
B.59 mA
C.5.9 mA
D.590 mA

Q5. How much resistance is required to limit the current from a 12 V battery to 3.6 mA?
A.3.3 k Ohms
B.33 k Ohms
C.2.2 k Ohms
D.22 k Ohms

Q6. What is the voltage source for a circuit carrying 2 A of current through a 36 Ohms resistor?
A.1.8 V
B.18 V
C.7.2 V
D.72 V

Q7. What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?
A.9.7 Ohms
B.97 Ohms
C.23 Ohms
D.230 Ohms

Q8. How much voltage is needed to produce 2.5 A of current through a 200 Ohms resistor?
A.50 V
B.500 V
C.80 V
D.8 V

Q9. When there is 12 mA of current through a 1.2 k Ohms resistor, the voltage across the resistor is
A.14.4 V
B.1.4 V
C.100 V
D.10 V

Q10. A resistance of 3.3 M Ohms  is connected across a 500 V source. The resulting current is approximately
A.15.1 µA
B.151 µA
C.66 mA
D.660 mA

Q11. You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?
A.9 V
B.900 mV
C.0 V
D.18 V

Q12. 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
A.112 Ohms
B.11.2 Ohms
C.1.2 Ohms
D.18 Ohms