Physics

Question 1

What is electric current?

Answer 1

Electric current is the flow of electric charge, typically measured in amperes.

Question 2

True or False: Electric current can only flow through conductive materials.

Answer 2

True

Question 3

Fill in the blank: The unit of electric current is called the _____.

Answer 3

ampere

Question 4

What is the symbol for electric current in equations?

Answer 4

I

Question 5

What does Ohm’s Law relate?

Answer 5

Ohm’s Law relates voltage (V), current (I), and resistance (R) in a circuit.

Question 6

Multiple choice: What is the formula for calculating electric current?

Answer 6

I = V / R

Question 7

True or False: Direct current (DC) flows in one direction only.

Answer 7

True

Question 8

What type of current alternates direction?

Answer 8

Alternating current (AC)

Question 9

Fill in the blank: A device that measures electric current is called an _____.

Answer 9

ammeter

Question 10

What is the relationship between current and resistance in a circuit?

Answer 10

Current is inversely proportional to resistance when voltage is constant.

Question 11

Multiple choice: Which of the following materials is a good conductor of electric current?

Answer 11

Copper

Question 12

True or False: Superconductors can conduct electric current without resistance.

Answer 12

True

Question 13

What is the effect of increasing the voltage in a circuit on the current?

Answer 13

Increasing the voltage increases the current, assuming resistance remains constant.

Question 14

Fill in the blank: The flow of electric current is caused by the movement of _____.

Answer 14

electrons

Question 15

What is the term for the opposition to the flow of electric current?

Answer 15

Resistance

Question 16

Multiple choice: Which unit is used to measure resistance?

Answer 16

Ohm

Question 17

True or False: An increase in temperature generally increases the resistance of a conductor.

Answer 17

True

Question 18

What is the formula for calculating power in an electrical circuit?

Answer 18

P = V × I

Question 19

Fill in the blank: Electric current is typically carried by _____.

Answer 19

wires

Question 20

What device converts electrical energy into mechanical energy?

Answer 20

Electric motor

Question 21

Multiple choice: What is the primary purpose of a resistor in a circuit?

Answer 21

To limit the flow of current

Question 22

True or False: Current can exist in a vacuum.

Answer 22

False

Question 23

What is the role of a capacitor in an electric circuit?

Answer 23

To store and release electrical energy.

Question 24

Fill in the blank: The flow of electric charge is driven by a difference in _____.

Answer 24

voltage

Question 25

What happens to current in a series circuit if one component fails?

Answer 25

The current stops flowing.

Question 26

Multiple choice: Which circuit configuration allows for multiple paths for current to flow?

Answer 26

Parallel circuit

Question 27

True or False: The total current in a parallel circuit is the sum of the currents through each path.

Answer 27

True