P4 Electricity and Circuits Quiz

What is the unit of electric current?

• Volt (V)

• Ohm (Ω)

• Ampere (A)

• Coulomb (C)

In a circuit diagram, current flows from the positive terminal of a cell or battery to the negative terminal. This is known as:

• Direct current

• Alternating current

• Conventional current

• Reverse current

What is the formula for potential difference (V)?

• V = IR

• V = I/R

• V = R/I

• V = I^2R

What happens to an atom when electrons are removed from it?

• It becomes negatively charged

• It becomes positively charged

• It remains neutral

• It becomes an ion

What is the unit of resistance?

• Volt (V)

• Ampere (A)

• Ohm (Ω)

• Coulomb (C)

Which of the following is a good conductor of electricity?

• Plastic

• Rubber

• Metal

• Wood

In a series circuit, if one component stops working, what happens to the whole circuit?

• The whole circuit stops working

• The other components continue to work

• The current increases

• The voltage increases

In a parallel circuit, what happens if one branch stops working?

• The whole circuit stops working

• The other branches will continue to work

• The current in the whole circuit stops

• The voltage in the whole circuit stops

What is the relationship between current and potential difference in an ohmic conductor?

• Current is inversely proportional to potential difference

• Current is directly proportional to potential difference

• Current is independent of potential difference

• Current is equal to potential difference

What is electric current?

• Rate of flow of charge

• Amount of charge stored

• Voltage across a component

• Resistance in a circuit