LV03 Revision 20 questions

Unit of electrical Power

• Volts

• Amps

• Ohms

• Watts

What is this?

• Capacitor

• Zener Diode

• Diode

• Transistor

What is the total resistance of a series circuit when R1 =10 ohms, R2 =5 ohms and R3 =2.5 ohms?

• 10.25

• 17.25

• 17.5

• 20.5

A poor earth connection will make the lamp;

• brighter

• no difference

• dimmer

• hotter

LED stands for?

• Late emitting diode

• light emulsifying diode

• Light emitting diode

• Last Elephant Dying

What is a potentiometer?

• variable resistor

• stores a voltage

• a switch

• limits current flow to one direction

Why are relays used?

• increase the current flow through a circuit

• reduce the current flow going through a switch

• give extra power to the switch

• has no effect on the circuit

How would you connect a volt meter to measure volts?

• in series

• in parallel

• doesn't matter

• all answers

What setting should a multimeter be on when checking Voltage on a 12V car's electrical system?

• 200 ACV

• 200DCV

• 20DCV

• 200kDCV

What happens to the bulbs in a parallel circuit if one blows?

• others get brighter

• no difference

• others get dimmer

• others go out