What is the unit of electric current?
Ohm Ω
Ampere A
Volts V
What instrument is used to measure electric current?
A voltmeter
An ammeter
A current meter
Where should an ammeter be connected in an electric circuit?
In series
In parallel
Before a component in the circuit but not after it
Two bulbs are connected in a series circuit. One bulb is unscrewed, what happens to the other bulb?
It gets dimmer
It does not light
It gets brighter
Two resistors are connected in series to a 12 V power supply. The voltage across one of the resistors is 10 V. What is the voltage across the second resistor?
2 V
10 V
12 V
Two bulbs are connected in a parallel circuit. One bulb is unscrewed, what happens to the other bulb?
Its brightness does not change
A parallel circuit has two identical resistors. A current of 4 A flows from the battery. What is the value of the current through each resistor?
1 A
2 A
4 A
A series circuit has two identical resistors. A current of 4 A flows from the battery. What is the value of the current through each resistor?
Two resistors are connected in parallel. The voltage across one of the resistors is 12 V. What is the voltage across the second resistor?