Ohm's Law

If doubling the voltage across a resistor doubles the current through the resistor then

• the resistor value decreased

• the resistor value did not change

• the resistor value increased

• it is impossible to determine the change in the resistor value

If the voltage across a fixed value of resistance is increased five times, what does the current do?

• It increases by a factor of five.

• It decreases by a factor of five.

• It stays the same.

• ot enough information

If the resistance in a circuit with constant voltage increases, the current will

• increase

• decrease

• stays the same

• not enough information

A damaged resistor

• may appear burned

• may have an increased resistance value

• may be checked with an ohmmeter

• all of the above

If voltage across a resistance doubled

• the current is halved

• the resistance doubles

• the current is unchanged

• none of the above

What is the resistor value in the given circuit?

• 200 Ω

• 1 kΩ

• 2 kΩ

• 4 kΩ

If the voltage in the given circuit was cut in half, what would the current equal?

• 10 mA

• 30 mA

• 60 mA

• 90 mA

Ohm's law describes the mathematical relationship between

• ohms, kilo-ohms, and mega-ohms

• resistor size and resistor value

• resistance, voltage, and current

• none of the above

If current through a resistance is halved

• the resistace is halved

• the voltage is halved

• the voltage doubles

• none of the above

If 1st band = Yellow; 2nd band = Violet; 3rd band = Brown; and V = 47 V, then I = ___?

• 0.1 A

• 0.1 mA

• 100 mA

• 470 mA