Electric Circuits and Current Electricity

1. According to Ohm's law, what is the relationship between the current flowing through a conductor and its resistance?

• A) They are directly proportional
• B) They are inversely proportional
• C) The current is proportional to the square of the resistance
• D) There is no fixed relationship

2. Which instrument is used to directly measure the current in a circuit?

• A) Voltmeter
• B) Galvanometer
• C) Ammeter
• D) Ohmmeter

3. A fuse is usually made of a thin wire composed of which materials?

• A) Copper and zinc
• B) Tin and lead
• C) Aluminum and silver
• D) Iron and nickel

4. What is the complete or closed path of current flow called?

• A) A resistor
• B) A circuit
• C) A potential difference
• D) A fuse

5. How is a voltmeter connected in a circuit to measure the potential difference between two points?

• A) In series
• B) In parallel
• C) Diagonally
• D) It is not connected to the circuit

6. What is the SI unit of resistance?

• A) Volt
• B) Ampere
• C) Watt
• D) Ohm

7. If a person improperly combines two 10-ampere fuse wires, what will be the effective rating of this new fuse setup?

• A) 10 amperes
• B) 5 amperes
• C) 20 amperes
• D) 100 amperes