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Understanding Voltage in Electric Circuits

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Understanding Voltage in Electric Circuits

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Questions and Answers

What is voltage a measure of?

Electrical potential energy per unit area
Electrical resistance per unit length
Electrical current per unit time
Electrical potential energy per unit charge (correct)

What is the direction of electric charge movement in a circuit?

From points of higher voltage to points of lower voltage (correct)
In a circular motion around the circuit
From points of lower voltage to points of higher voltage
In a random and unpredictable pattern

How is voltage generated in a battery?

Through the flow of electric current
Through the resistance of the conductor
Through mechanical energy from rotating coils
Through chemical reactions inside the cells (correct)

What is the mathematical expression of Ohm's Law?

V = IR (D) Signup and view all the answers

What is the importance of understanding the relationship between voltage, current, and resistance?

For designing and analyzing electrical circuits (B) Signup and view all the answers

What is the effect of increasing the voltage in a circuit with a constant resistance?

It increases the current flowing through the circuit. (C) Signup and view all the answers

What is the formula to calculate power in electrical systems?

P = VI (B) Signup and view all the answers

What is the term for the decrease in voltage along a conductor due to its resistance?

Voltage drop (C) Signup and view all the answers

In which type of circuit does the voltage remain constant over time?

Direct current (DC) circuit (C) Signup and view all the answers

What is the result of high resistance in long wires or circuits?

Voltage drop (B) Signup and view all the answers