Electric Current

What is the unit of electric current?

• Volt
• Ohm
• Ampere
• Watt

Which of the following defines voltage?

• The rate of flow of charge
• The opposition to current flow
• The difference in electric potential between two points
• The energy used per unit of charge

What does resistance measure in an electrical circuit?

• The amount of current flowing
• The difference in voltage
• The opposition to the flow of current
• The total energy consumed

According to Ohm's Law, what happens to the current if the resistance increases, assuming voltage is constant?

• Current increases
• Current decreases
• Current remains the same
• Current fluctuates

Which of the following materials is typically an insulator?

• Copper
• Aluminum
• Rubber
• Iron

In which type of circuit is the total resistance equal to the sum of the individual resistances?

• Parallel Circuit
• Series Circuit
• Complex Circuit
• Short Circuit

What is the unit of resistance?

• Volt
• Ampere
• Ohm
• Watt

What happens to the total resistance in a parallel circuit when more resistors are added?

• It increases
• It decreases
• It remains the same
• It doubles

Which device is used to measure the voltage across a component?

• Ammeter
• Voltmeter
• Ohmmeter
• Galvanometer

What is the purpose of a fuse in an electrical circuit?

• To store charge
• To measure current
• To protect the circuit from overload
• To increase resistance