Ohms Law Practice Problems

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. It can be expressed as V = I × R.

Front

What is the unit of resistance?

Back

Resistance is measured in ohms (Ω).

Front

If a circuit has a voltage of 12 volts and a resistance of 3 ohms, what is the current?

Back

Using Ohm's Law, I = V / R = 12V / 3Ω = 4 A.

Front

What happens to the current if the resistance increases while the voltage remains constant?

Back

If the resistance increases while the voltage remains constant, the current decreases.

Front

What is the relationship between voltage, current, and resistance in a circuit?

Back

The relationship is defined by Ohm's Law: V = I × R.

Front

What type of energy conversion occurs in a light bulb?

Back

A light bulb converts electrical energy into light and heat energy.

Tags

NGSS.HS-PS3-3

Front

If two resistors are in series, how do you calculate the total resistance?

Back

The total resistance (R_total) in series is the sum of the individual resistances: R_total = R1 + R2 + ... + Rn.

Front

If two resistors are in parallel, how do you calculate the total resistance?

Back

The total resistance (R_total) in parallel is given by 1/R_total = 1/R1 + 1/R2 + ... + 1/Rn.

Front

What is the effect of increasing voltage on the brightness of a bulb?

Back

Increasing the voltage increases the current, which can make the bulb brighter, assuming the resistance remains constant.

Front

What is the formula to calculate power in an electrical circuit?

Back

Power (P) can be calculated using the formula P = V × I, where V is voltage and I is current.