A simplified drawing of an electrical circuit using standardized symbols for components like batteries, resistors, switches, and bulbs.
A circuit diagram is like a map for electricity — it shows what's connected to what without drawing realistic pictures.
Showing a random 20 of 50 problems.
Example 1
medium
In a diagram, the layout draws a resistor far from the battery with a long bent wire. Does the bend affect the circuit's behavior?
Example 2
medium
A diagram shows a 6 V battery connected to two parallel resistors 4Ω and 12Ω. Find the current from the battery.
Example 3
hard
A schematic shows a 12 V battery, a switch, and two bulbs in series. The switch is initially open. If the user closes the switch, what happens to the voltage measured across the open switch (before vs after)?
Example 4
medium
On a schematic the longer line of a battery symbol is the ___ terminal.
Example 5
easy
On a schematic, a circle with a letter 'A' inside represents what?
Example 6
medium
In a schematic, two bulbs in series are powered by a 12 V battery. If they are identical, what voltage drops across each?
Example 7
easy
A voltmeter is always placed in ___ with the component whose voltage you want to measure.
Example 8
challenge
A schematic shows a Wheatstone bridge: four R in a diamond with a galvanometer across the middle, balanced. If one R is replaced with 2R, what current direction flows through the galvanometer (relative to the labeled top vertex A)?
Example 9
medium
A diagram shows a battery, then the wire splits into two resistors that rejoin before returning. Are the resistors in series or parallel?
Example 10
challenge
A schematic shows a 12 V battery with internal resistance 1Ω powering a 5Ω external resistor. Find the terminal voltage of the battery.
Example 11
challenge
A diagram shows a battery and three bulbs: one in the main line before the path splits into two parallel bulbs. If the main-line bulb burns out, what happens to the two parallel bulbs?
Example 12
medium
A diagram shows a 9 V battery and three bulbs in parallel. If each bulb has resistance 9Ω, find the current through one bulb.
Example 13
easy
An ammeter is always placed in ___ with the component whose current you want to measure.
Example 14
medium
A schematic has a switch in series with the battery, then the path splits into two parallel bulbs. What happens to both bulbs when the switch opens?
Example 15
easy
On a battery symbol, which terminal is the longer line?
Example 16
easy
What does a simple resistor symbol (zigzag or rectangle) represent?
Example 17
easy
Two bulbs in series share the same ___ but split the ___.
Example 18
challenge
A schematic shows a battery, then the path splits: branch A has two resistors one after another, branch B has one resistor, and the branches rejoin. Describe the topology of branch A's resistors and the two branches.
Example 19
challenge
A schematic uses an ammeter and a voltmeter. The ammeter must be placed in series with the component, the voltmeter in parallel. Why these placements?
Example 20
medium
In a schematic, a wire crosses another with a small bump (or labeled 'no connection'). What does the bump mean?