8/31 Ohm's Law Problems - In Class Exercise

Ohm's Law Problems Simple questions based on the law V = IR

 

What current would flow through a resistor of 20 ohms connected to a 12 V supply? • [A] 240 A • [B] 1.66 A • [C] 0.67 A • [D] 0.067A

What current would flow through a resistor of 40 ohms connected to a 10 V supply? • [A] 400 A • [B] 4 A • [C] 0.25 A • [D] 0.025A

A 100 ohm resistor is connected to a 20 V supply. What current flows? • [A] 0.02 A • [B] 0.05 A • [C] 0.2 A • [D] 0.5 A • [E] 2000 A

What value of resistor would be used to permit a current of 0.2 A to flow using a 6V supply? • [A] 0.03 ohms • [B] 0.3 ohms • [C] 3.0 ohms • [D] 30 ohms • [E] 300 ohms

What supply voltage would be needed to provide a current of 1.2 A through a 40 ohm resistor? • [A] 48 V • [B] 480 V • [C] 0.3 V • [D] 0.03 V

A resistor allows a current of 0.6 A to flow when connected to a 9.6 volt supply. What current would flow if the same resistor was connected to a 12.8 V supply? • [A] 0.2 A • [B] 0.8 A • [C] 22.4 A • [D] 6.4 A

Calculate the voltage supply needed to produce a current of 12A when used with a 48 ohm resistor. • [A] 0.25 V • [B] 4 V • [C] 60 V • [D] 576 V

Calculate the voltage across a 300 ohm resistor when a current of 0.004 A flows through it. • [A] 0.012 A • [B] 0.012 V • [C] 0.12 V • [D] 1.2 V • [E] 12 V

Find the size of resistor which would allow limit the current to a value of 0.02 A when connected to an 8 V supply. • [A] 0.16 ohms • [B] 1.6 ohms • [C] 16 ohms • [D] 40 ohms • [E] 400 ohms

Calculate the current that will flow when a total resistance of 500 ohms is placed in a circuit which has a 15 volt supply. • [A] 0.00003 A • [B] 0.0003A • [C] 0.003 A • [D] 0.03 A • [E] 0.3 A