Cycle 4 Assessment Review II

What is the formula for calculating the electric force between two charges using Coulomb's law?

Which of the following is an example of an electric force in everyday life?

• The gravitational pull of the Earth

• The operation of a motor

• The buoyant force on a submerged object

• The frictional force between two surfaces

What happens to the electric force between two charges if the distance between them is doubled?

• It remains the same

• It doubles

• It is halved

• It is reduced to a quarter

Which device is used to demonstrate the conservation of charge through induction?

• Ammeter

• Electroscope

• Voltmeter

• Thermometer

In a series circuit, how does the total resistance compare to the individual resistances?

• It is the sum of the individual resistances

• It is the product of the individual resistances

• It is the average of the individual resistances

• It is the reciprocal of the sum of the reciprocals of the individual resistances

What is the unit of electric current?

• Volt

• Ohm

• Ampere

• Watt

Which of the following materials can be used to demonstrate polarization?

• Silk

• Wood

• Plastic

• Glass

What is the potential difference across a resistor with a resistance of 5 ohms and a current of 2 amperes flowing through it?

• 2 volts

• 5 volts

• 10 volts

• 20 volts

Which of the following is a characteristic of a parallel circuit?

• The current is the same through all components

• The voltage is the same across all components

• The total resistance is the sum of individual resistances

• The power is the same across all components

What is the power used by a device with a current of 3 amperes and a voltage of 12 volts?

• 36 watts

• 15 watts

• 4 watts

• 24 watts