ohm's law Quiz Practice Quiz | ohm's law

Q: Which of the following statements best describes Ohm's Law?

The current through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance. — Ohm's Law defines the relationship between voltage, current, and resistance in a conductor.

Q: If a 12V battery is connected to a resistor and a current of 2A flows through the circuit, what is the resistance of the resistor?

6 Ohms — Using Ohm's Law (R=V/I), R = 12V / 2A = 6 Ohms.

Q: What is the unit of measurement for electrical resistance?

Ohm (?) — Resistance is measured in Ohms, denoted by the Greek letter Omega (?).

Q: A circuit has a resistance of 10 Ohms and a voltage source of 5V. What is the current flowing through the circuit?

0.5 A — Using Ohm's Law (I=V/R), I = 5V / 10? = 0.5A.

Q: What happens to the current in a circuit if the voltage is doubled and the resistance remains constant?

The current doubles. — According to Ohm's law, current is directly proportional to voltage when resistance is constant.

Q: If the resistance in a circuit is tripled and the voltage remains constant, what happens to the current?

The current is reduced to one-third. — Current is inversely proportional to resistance (I = V/R).

Q: Which of the following is NOT a form of Ohm's Law?

P = VI — P=VI represents power, not a direct formula of Ohm's Law. V=IR, I=V/R, R=V/I are all derived from Ohm's Law.

Q: In a series circuit, if the total voltage is 10V and the total resistance is 5 Ohms, what is the total current?

2 A — Total current = Total Voltage / Total Resistance = 10V / 5? = 2A.

Q: What is the effect on current if the voltage is increased while keeping the resistance constant?

Current increases. — According to Ohm's Law, current increases when voltage increases, assuming resistance is constant.

Q: A resistor has a color code of Red-Red-Brown. What is its resistance in Ohms?

220 Ohms — Red-Red-Brown represents 220 Ohms. (2, 2, 10^1).

Question 1 of 15

Which of the following statements best describes Ohm's Law?

Ohm's Law defines the relationship between voltage, current, and resistance in a conductor.

Question 2 of 15

If a 12V battery is connected to a resistor and a current of 2A flows through the circuit, what is the resistance of the resistor?

Using Ohm's Law (R=V/I), R = 12V / 2A = 6 Ohms.

Question 3 of 15

What is the unit of measurement for electrical resistance?

Resistance is measured in Ohms, denoted by the Greek letter Omega (?).

Question 4 of 15

A circuit has a resistance of 10 Ohms and a voltage source of 5V. What is the current flowing through the circuit?

Using Ohm's Law (I=V/R), I = 5V / 10? = 0.5A.

Question 5 of 15

What happens to the current in a circuit if the voltage is doubled and the resistance remains constant?

According to Ohm's law, current is directly proportional to voltage when resistance is constant.

Question 6 of 15

If the resistance in a circuit is tripled and the voltage remains constant, what happens to the current?

Current is inversely proportional to resistance (I = V/R).

Question 7 of 15

Which of the following is NOT a form of Ohm's Law?

P=VI represents power, not a direct formula of Ohm's Law. V=IR, I=V/R, R=V/I are all derived from Ohm's Law.

Question 8 of 15

In a series circuit, if the total voltage is 10V and the total resistance is 5 Ohms, what is the total current?

Total current = Total Voltage / Total Resistance = 10V / 5? = 2A.

Question 9 of 15

What is the effect on current if the voltage is increased while keeping the resistance constant?

According to Ohm's Law, current increases when voltage increases, assuming resistance is constant.

Question 10 of 15

A resistor has a color code of Red-Red-Brown. What is its resistance in Ohms?

Red-Red-Brown represents 220 Ohms. (2, 2, 10^1).

Question 11 of 15

Ohm's law primarily applies to which type of materials?

Ohm's law applies to materials that exhibit linear voltage-current relationship, primarily conductors.

Question 12 of 15

Which of the following graphs best represents the relationship between voltage (V) and current (I) in a circuit obeying Ohm's Law?

The relationship is linear: the current increases proportionally with voltage.

Question 13 of 15

If the voltage across a resistor is 10V and the current flowing through it is 0.05A, what is the resistance of the resistor?

Using Ohm's Law (R = V/I), R = 10V / 0.05A = 200 Ohms.

Question 14 of 15

What is the relationship between the slope of a Voltage vs. Current (V-I) graph and the resistance?

In a V-I graph, the slope represents the resistance (R=V/I).

Question 15 of 15

Which device does NOT typically obey Ohm's Law?

Light bulbs are non-linear devices; their resistance changes with current/temperature, therefore they don't strictly obey Ohm's Law.

ohm's law Quiz