Electricity Resistance Challenge

What is the formula to calculate electrical resistance?

• R = V - I

• R = V / I

• R = V * I

• R = I / V

If a resistor has a voltage of 12V and a current of 3A, what is its resistance?

• 4 ohms

• 8 ohms

• 2 ohms

• 6 ohms

A resistor has a resistance of 100 ohms. If a current of 0.5A flows through it, what is the voltage across the resistor?

• 75 volts

• 25 volts

• 50 volts

• 150 volts

How is resistance affected when the length of a wire is increased?

• Resistance remains the same

• Resistance becomes negative

• Resistance decreases

• Resistance increases

What is the unit of measurement for electrical resistance?

• Ohm

• Ampere

• Joule

• Volt

If two resistors are connected in series, how does it affect the total resistance?

• The total resistance remains the same.

• The total resistance becomes negative.

• The total resistance decreases.

• The total resistance increases.

Explain the relationship between resistance, current, and voltage in a circuit.

• Voltage is inversely proportional to resistance

• Resistance is directly proportional to current

• The relationship between resistance, current, and voltage in a circuit is described by Ohm's Law: V = I * R.

• Current is independent of resistance

If a resistor has a resistance of 50 ohms and a voltage of 10V, what is the current flowing through it?

• 0.2A

• 1A

• 0.5A

• 5A

What happens to the resistance of a conductor as its temperature increases?

• Resistance decreases

• Resistance remains constant

• Resistance becomes negative

• Resistance increases

Calculate the resistance of a resistor if it has a voltage of 6V and a current of 2A.

• 3 ohms

• 4 ohms

• 5 ohms

• 7 ohms