Electricity Exit Ticket
| # | Answer |
|---|---|
| 1 | Electricity is the movement of electric charge, usually through a wire or another material. |
| 2 | Electrons carry charge in a metal wire. |
| 3 | A circuit is a complete path that allows electric current to flow. |
| 4 | Current is the flow of electric charge, while voltage is the force that pushes the charge through a circuit. |
| 5 | Current can only flow when there is a complete path from the power source through the components and back again. |
| 6 | A battery is one source of electrical energy. |
| 7 | A switch opens or closes a circuit to stop or allow current flow. |
| 8 | A resistor reduces or controls the flow of current. |
| 9 | The bulb will go out because no current can flow. |
| 10 | They need to allow electrons to move easily so current can flow efficiently. |
| 11 | Conductors allow electric charge to move easily, while insulators do not. |
| 12 | Rubber is an insulator, so it helps prevent electric current from escaping and protects users. |
| 13 | Resistance is the opposition that a material gives to the flow of electric current. |
| 14 | Increasing resistance decreases the current. |
| 15 | The unit of electric current is the ampere, or amp (A). |
| 16 | The unit of voltage is the volt (V). |
| 17 | The unit of resistance is the ohm (Ω). |
| 18 | Current = Voltage ÷ Resistance = 12 ÷ 6 = 2 A. |
| 19 | Resistance = Voltage ÷ Current = 9 ÷ 3 = 3 Ω. |
| 20 | Voltage = Current × Resistance = 4 × 5 = 20 V. |
| 21 | The current increases because a greater voltage pushes more charge through the circuit. |
| 22 | They use energy at a faster rate, so a higher power rating means more energy is transferred each second. |
| 23 | Electrical power is the rate at which electrical energy is transferred or used. |
| 24 | The unit of electrical power is the watt (W). |
| 25 | Energy = Power × Time = 100 × 10 = 1000 J. |
| 26 | Electric current can disrupt nerve signals, damage muscles and organs, and cause burns or death. |
| 27 | Water often contains dissolved ions, which help it conduct electricity more easily. |
| 28 | The body conducts electricity because it contains water and dissolved salts that allow charged particles to move. |
| 29 | Nerve cells use electrical impulses to transmit messages through the body. |
| 30 | The statement is partly correct because both involve moving charge, but they are not exactly the same. In wires, electrons move through metal, while in the body electrical signals are mainly caused by ion movement across cell membranes. |