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Understanding Direct Current Circuits

Authored by thanawee ors

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9th Grade

Understanding Direct Current Circuits
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is Ohm's Law?

Ohm's Law is V = I * R.

Ohm's Law defines resistance as the ratio of voltage to current.

Ohm's Law is I = V / R.

Ohm's Law states that power equals voltage times current.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is voltage defined in an electrical circuit?

Voltage is the electric potential difference between two points in an electrical circuit.

Voltage is the amount of energy consumed by a device.

Voltage is the resistance offered by a circuit component.

Voltage is the total current flowing in a circuit.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for calculating current using Ohm's Law?

I = V * R

I = R / V

I = V + R

I = V / R

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the resistance is 5 ohms and the voltage is 10 volts, what is the current?

2 amps

1 amp

5 amps

10 amps

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What unit is used to measure electrical resistance?

ohms

amps

watts

volts

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

The current remains the same.

The current increases.

The current decreases.

The current fluctuates randomly.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does Ohm's Law apply to series circuits?

In a series circuit, the total current is the sum of the currents through each component.

In a series circuit, the total resistance is the sum of the voltages across each component.

Ohm's Law states that in a series circuit, the total voltage is the sum of the voltages across each component, with the same current flowing through all components.

Ohm's Law states that voltage is constant across all components in a series circuit.

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