Understanding Electricity and Motion

What is the primary difference between alternating current (AC) and direct current (DC)?

• AC flows in one direction, while DC changes direction periodically.

• AC changes direction periodically, while DC flows in one direction.

• AC is generated by batteries, while DC is generated by turbines.

• AC is used in small electronic devices, while DC is used in power grids.

Which component is used to store electrical energy in a circuit?

• Resistor

• Capacitor

• Inductor

• Diode

What is the unit of electric current?

• Volt

• Ohm

• Ampere

• Watt

Which of the following is a renewable source of energy for generating electricity?

• Coal

• Natural Gas

• Nuclear

• Wind

According to Newton's second law of motion, what is the formula for force?

What is the role of a diode in an electrical circuit?

• To store energy

• To allow current to flow in one direction only

• To increase voltage

• To decrease resistance

Which of the following devices converts sunlight directly into electricity?

• Wind turbine

• Photovoltaic cell

• Hydroelectric dam

• Nuclear reactor

What is the unit of electrical resistance?

• Volt

• Ohm

• Ampere

• Watt

Which of the following is NOT a method of generating AC electricity?

• Using a wind turbine

• Using a photovoltaic cell

• Using a hydroelectric dam

• Using a steam turbine

What is the relationship between voltage (V), current (I), and resistance (R) in Ohm's Law?