Electric Circuits

What is the name of the component shown by the circuit symbol above?

• Bulb

• LDR

• Thermistor

• LED

Which component produces the Current-Voltage graph above?

• filament bulb

• diode

• fixed resistor

How many volts is produced by three cells of 3 V each in series?

• 3V

• 1.5V

• 9V

• 27V

A circuit contains two resistors in series. One is 5ohms and the other 10 ohms. What is the total resistance of the circuit?

• 5 ohms

• 10 ohms

• 15 ohms

Which circuit will produce the least resistance?

• series circuit

• parallel circuit

How many amps is the same as 120mA (milliamps)

• 120A

• 12A

• 0.12A

• 0.012A

How many ohms is equivalent to 3.2kΩ?

• 320 Ohms

• 32 Ohms

• 3200 Ohms

• 3.2 Ohms

If the cell above has a potential difference of 8V, what is the potential difference across one bulb?

• 8V

• 4V

• 16V

• 2V

If the cell in the circuit above has a potential difference of 8V, what is the potential difference across one of the bulbs?

• 8V

• 4V

• 16V

• 2V

Look at figure 4. Ammeter A2 and A3 read the same value at 0.4Amps. What is the reading on Ammeter A1?

• 0.4A

• 0.2A

• 0.8A