scinece test for baddies

What is the formula for converting power from energy and time in kW•h/t(h)?

kW•h/t(h) x 1000

How do you calculate daily average usage of electricity?

Divide the energy used (kWh) by power (kW) to get total weekly hours, then divide by 7 for daily hours.

What happens when you touch a long-haired cat and then a metal doorknob?

You may receive a static shock due to the transfer of static electricity.

What charge would plastic wrap have when rubbed against glass?

Plastic wrap becomes negatively charged.

What is the outcome of rubbing two insulators together?

It results in one object gaining a positive charge and the other gaining a negative charge.

Why do metals make good conductors of electricity?

Metals have free electrons that allow electric charge to flow easily.

What is the difference between induction and conduction in charging?

Induction redistributes charges without direct contact; conduction involves direct transfer of electrons.

What are the two significant types of electrical circuits?

Parallel circuits and series circuits.

What is the significance of resistor color codes?

They indicate the resistance value and tolerance of resistors.

How do you calculate the cost of electricity?

Find kWh using E=Pt, then multiply by the cost per kWh.

What is static electricity?

Static electricity is the build-up of electric charge due to the transfer of electrons between materials.

What is the definition of voltage?

Voltage is the potential difference that drives current through a circuit.

Define current in an electrical context.

Current is the continuous flow of electrons through a conductor.

What is resistance?

Resistance is the opposition to the flow of electric current.

What does a voltmeter measure?

A voltmeter measures voltage in a circuit.

What does an ammeter measure?

An ammeter measures the current flowing in a circuit.

How do you recognize a series circuit?

A series circuit has one path for current to flow and if one component fails, the entire circuit is broken.

Describe a parallel circuit.

A parallel circuit has multiple paths for current to flow and one pathway's failure doesn't affect the others.

What is the unit of electric charge?

Coulomb.

What is the formula for energy in joules?

Energy (E) = Power (P) × Time (t).

What is 1 kWh in joules?

1 kWh = 3.6 million joules.

What does the slope in a voltage vs. current graph represent?

The slope represents resistance.

What is the function of a resistor in a circuit?

A resistor controls the flow of current in a circuit.

Explain the concept of conservation of charge.

Opposite charges attract, and like charges repel.

What happens to voltage in a series circuit?

Voltage is divided among the components in a series circuit.

What happens to current in a parallel circuit?

Current is split among the paths in a parallel circuit.

What is the role of electrodes in a battery?

Electrodes are the conductors through which electric current enters or leaves the battery.

Define milliampere.

Milliampere is one-thousandth of an ampere.

What are the characteristics of a conductor?

Conductors allow easy flow of electric charge.

What is an electroscope?

An electroscope is a device used to detect electric charge.

What does jumping electrons refer to in static electricity?

Electrons jump due to friction between different materials, creating an electric charge.

How do you identify positive, negative, or neutral charges?

Positive charge attracts negative charges and repels other positive charges; neutral charges do not attract or repel.

What is the purpose of a circuit diagram?

A circuit diagram visually represents the components and arrangement of an electrical circuit.

What is static discharge?

Static discharge occurs when accumulated static electricity is released suddenly.

What happens when a conductor is touched and rubbed against another conductor?

There will be no charge transfer.

How do you calculate resistance using Ohm's Law?

Resistance (R) = Voltage (V) / Current (I).

What does it mean to have a higher resistance?

A higher resistance indicates less current flow for a given voltage.

What is the fourth color in a resistor code and its significance?

The fourth color indicates the tolerance percentage.

How does charge accumulate on materials?

Charge accumulates due to the transfer of electrons during contact and friction.

What is the effect of temperature on resistance?

Resistance typically increases with temperature in conductors.

Explain the process of charging by induction.

Charging by induction involves bringing a charged object near a neutral object, redistributing its charges.

What is the primary unit of power?

The primary unit of power is the watt (W).

What factors influence the flow of current in a circuit?

Voltage and resistance are the primary factors influencing current flow.

How does an appliance convert electrical energy into other forms of energy?

An appliance converts electrical energy into forms such as heat, light, or motion, depending on its design.