ir and emf

What are these components?

• A - diode B - resistor C - thermistor D - variable resistor

• A - LED B - resistor C - light dependent resistor D - thermistor

• A - diode B - resistor C - light dependent resistor D - variable resistor

• A - LED B - resistor C - variable resistor D - thermistor

What component is this the current/voltage graph for?

• NTC Thermistor

• Lamp

• Diode

• wire

The current in a series circuit is (tick all that apply):

• the same everywhere

• measured in coulombs per second

• less after each component

• split proportionally based on the resistance of each component

Potential difference is split between components in series

• true

• false

what is the potential difference across each component (with units)

The emf is: (tick all the apply)

• The energy per unit charge produced by a power source

• measured in joules per coulomb

• The energy transferred per unit charge

• Always less than the potential difference across the terminals when it is connected within a circuit

How do we calculate the total resistance for resistors in series

• 1/Rtotal = 1/Ra +1/Rb +1/Rc....

• Rtotal = Ra + Rb + Rc....

• Rtotal = 1/Ra +1/Rb + 1/Rc

A battery of emf 6v and internal resistance of 2Ω is connected to a 8Ω resistor. Calculate the total resistance of the circuit

Calculate the energy transfer in 1200 seconds in a component when the pd across it is 16V and the current is 0.04A

An electrical motor consumes 30W of power when a current of 5A passes through it. What is the potential difference across the motor?