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EE Quarter 2 Exam
Exploration Education Q2 Exam Study Stack
| Question | Answer |
|---|---|
| Explain why an atom can have a static charge. | It gains or loses electrons, becoming negatively (gains e–) or positively (loses e–) charged. |
| Compare identical bulbs in parallel vs. series. | Bulbs in parallel are brighter because each gets full voltage; series bulbs share voltage and are dimmer. |
| Two students push identical boxes the same distance, one in half the time—what is true? | They do the same work, but the faster student produces more power. |
| When energy transforms, some is usually lost as… | Heat (thermal energy). |
| “Mechanism” means… | A system of parts working together in a machine. |
| A wedge is… | An inclined plane that moves; used to split, cut, or push materials apart. |
| Electricity is… | The flow of electric charges (electrons). |
| A resistor does what in a circuit? | Opposes current, reducing the flow of electrical charge. |
| How does a balloon become negatively charged after rubbing on wool? | It gains electrons from the wool. |
| Compound pulley systems are most effective for… | Reducing effort force needed to lift loads. |
| A series circuit… | Has one path for current; if one component fails, all turn off. |
| An inclined plane reduces required force because… | It spreads the work over a longer distance, reducing input force. |
| Static charge occurs when… | Electrons are transferred between objects. |
| Parts of a motor (simple motor from diagram in the book) | A: Brush, B: Power Source, C: Fixed Magnet, D: Armature |
| Will the two atoms attract or repel? | If both have similar charges → repel; opposite charges → attract. (Most exam versions show opposite → attract.) |
| Friction heats objects because… | Surfaces rubbing convert mechanical energy to heat. |
| Pulleys are useful because… | They change direction of force and/or reduce input force. |
| Circuit shown? | Usually series (if one continuous loop) or parallel (if branches). |
| Relationship between force, distance, work? | Work = Force × Distance. |
| Lubricants reduce friction by… | Creating a smooth/low-resistance layer between surfaces. |
| A wheel and axle works because… | A large wheel turns a small axle, multiplying force. |
| Correct use of “conductive”? | “Copper is highly conductive, allowing electricity to flow easily.” |
| Power measures… | The rate of doing work (work/time). |
| To increase an electromagnet’s strength… | Add more coils, increase current, or use a stronger iron core. |
| Friction is… | A force that opposes motion between surfaces. |
| A battery transforms chemical energy to… | Electrical energy. |
| Mechanical advantage is… | Output force ÷ Input force. |
| Changing magnetic field induces current—this principle is called… | Electromagnetic induction. |
| A ramp allows less force but more distance, meaning… | Work stays the same; force × distance trade-off. |
| Example of a second-class lever? | Wheelbarrow. |
| In a parallel circuit… | Components each get full voltage; if one opens, others stay lit; multiple paths exist. |
| Example of no work done? | Pushing a wall that does not move. |
| “The technician calibrated the system.” Calibrated means… | Adjusted/ set accurately. |
| Mechanical advantage ratio? | Output force ÷ Input force. |
| Power of motor lifting 4000 N, 15 m, 30 s? | Work = 4000 × 15 = 60,000 J; Power = 60,000 ÷ 30 = 2000 W. |
| Equation for Resistance | V=IR |
| Heat is… | Thermal energy transfer from warmer to cooler objects. |
| Define electrolyte | A liquid that holds and electric charge |
Created by:
nolahomers
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