Ohm's Law

The video tutorial explains the concept of water pressure and its relation to height. It introduces potential difference and its similarity to water pressure, followed by an explanation of Ohm's Law, which describes the relationship between voltage, current, and resistance. The tutorial discusses the properties of conductors and insulators, and demonstrates practical applications of Ohm's Law through calculations of current and voltage in circuits.

What is the relationship between water pressure and the height of a water column?

• Water pressure decreases as height increases.

• Water pressure increases as height increases.

• Water pressure is unrelated to height.

• Water pressure remains constant regardless of height.

In the circuit experiment, what happens to the current when a second cell is added?

• The current decreases.

• The current remains the same.

• The current doubles.

• The current triples.

According to Ohm's Law, what is the relationship between voltage and current?

• Voltage is equal to current.

• Voltage is unrelated to current.

• Voltage is directly proportional to current.

• Voltage is inversely proportional to current.

What does a resistance of 1 ohm signify in a conductor?

• 2 volts across the conductor with 2 amperes of current.

• 1 volt across the conductor with 1 ampere of current.

• 1 volt across the conductor with 2 amperes of current.

• 2 volts across the conductor with 1 ampere of current.

How does increasing resistance affect the flow of current?

• It has no effect on the flow of current.

• It decreases the flow of current.

• It doubles the flow of current.

• It increases the flow of current.

Which type of conductor has the highest resistance?

• Semiconductors

• Insulators

• Bad conductors

• Good conductors

Using Ohm's Law, what is the current flow in a 100 ohm resistor connected to a 20 volt supply?

• 0.4 amperes

• 0.2 amperes

• 0.1 amperes

• 0.3 amperes