reisitance Quiz

What is the flow of electrons through a conductor referred to as?

• Voltage

• Resistance

• Electric current

• Power

Answer explanation

The flow of electrons through a conductor is referred to as electric current.

What is the unit of electric current?

• Volt (V)

• Ohm (Ω)

• Ampere (A)

• Watt (W)

Answer explanation

The unit of electric current is Ampere (A), which is the correct choice for this question.

What is the symbol for electric current?

• V

• R

• P

• I

Answer explanation

The symbol for electric current is represented by the letter 'I'. Therefore, the correct symbol for electric current is 'I'.

What is the term used to describe the opposition to current flow in a circuit?

• Voltage

• Current

• Resistance

• Capacitance

Answer explanation

The term used to describe the opposition to current flow in a circuit is Resistance.

What is the unit of resistance?

• Volt (V)

• Ampere (A)

• Ohm (Ω)

• Farad (F)

Answer explanation

The unit of resistance is Ohm (Ω), represented by the symbol Ω in electrical circuits.

What is the symbol for resistance?

• V

• I

• R

• C

Answer explanation

The symbol for resistance is 'R'. It is represented by the letter 'R' in electrical circuits.

According to Ohm's law, what is the relationship between current (I), voltage (V), and resistance (R)?

• Current is directly proportional to resistance and inversely proportional to voltage.

• Current is directly proportional to voltage and inversely proportional to resistance.

• Voltage is directly proportional to resistance and inversely proportional to current.

• Voltage is directly proportional to current and inversely proportional to resistance.

Answer explanation

Current is directly proportional to voltage and inversely proportional to resistance.

Which of the following equations correctly represents Ohm's law?

• V = I / R

• I = V * R

• V = I * R

• R = V * I

Answer explanation

The correct choice is V = I * R as per Ohm's law, where Voltage (V) equals Current (I) multiplied by Resistance (R).

If the voltage (V) is 10 volts and the resistance (R) is 2 ohms, what is the current (I) according to Ohm's law?

• 5 amperes

• 20 amperes

• 2 amperes

• 10 amperes

Answer explanation

According to Ohm's law (V = I * R), I = V / R. Substituting V = 10 volts and R = 2 ohms, I = 10 / 2 = 5 amperes.

What must remain constant for Ohm's law to be applicable?

• Voltage

• Current

• Temperature

• Resistance

Answer explanation

Temperature must remain constant for Ohm's law to be applicable.