U5 Day 4 - Ohms Law

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 happens to current if voltage increases while resistance remains constant?

Back

The current increases.

Front

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

Back

The current decreases.

Front

What is the unit of measure for current?

Back

The unit of measure for current is the ampere (A).

Front

If a toaster has a resistance of 12 ohms and is connected to a 120-volt circuit, what is the current?

Back

The current is 10A.

Front

Calculate the current in a circuit with a 1.5-volt battery and a lamp with a resistance of 3 ohms.

Back

The current is 0.5A.

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

If the voltage is constant at 10 volts and the resistance is increased from 5 ohms to 10 ohms, what happens to the current?

Back

The current decreases from 2A to 1A.

Front

What is the formula to calculate resistance?

Back

Resistance (R) can be calculated using the formula R = V / I.

Front

If a circuit has a current of 3A and a resistance of 6 ohms, what is the voltage?

Back

The voltage is 18V.