PHYSICS - Electricity - Current

This video tutorial explains the concept of electric current, its measurement using an ammeter, and the conditions necessary for current to flow. It covers the differences between series and parallel circuits, and how current is distributed in each. The video also introduces the formula for calculating current using charge and time, and provides practice questions to reinforce understanding.

What is the primary function of an ammeter in an electrical circuit?

• To measure resistance

• To measure current

• To measure power

• To measure voltage

What two conditions are necessary for electrons to flow in a circuit?

• A high resistance and a short circuit

• A low resistance and an open circuit

• A potential difference and a complete circuit

• A high voltage and a broken circuit

How does a switch control the flow of current in a circuit?

• By increasing the voltage

• By changing the direction of current

• By decreasing the resistance

• By creating or closing a break in the circuit

In a series circuit, how do the readings on all ammeters compare?

• They are all different

• They are all negative

• They are all the same

• They are all zero

What is the formula to calculate current in a circuit?

• Current = Voltage x Resistance

• Current = Charge / Time

• Current = Power / Voltage

• Current = Resistance / Charge