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WorksheetsPhysics Form 5 KBSM 2.4 EMF & Internal resistance
Total questions: 12
Worksheet time: 21mins
EMF is ________ done by a source to move 1C of charge through a complete circuit.
work
resistance
current
voltage
The SI unit for EMF is
JC-1
VA-1
ΩA-1
VC-1
Internal resistance in a cell is
resistance against the moving charge due quality.
resistance against the moving charge due materials.
resistance against the moving charge due to electrolyte.
resistance against the moving charge due to time taken.
In this circuit, why the voltmeter reading is less than 5 V when the switch is closed?
There are no current flow
The current flow is not enough
There are heating in resistor
There are drop of voltage due to internal resistance
The graph of V against I below is plotted after an experiment. Which circuit diagram is used?
Which formula is correct?
E=I(R+r)
E=V+r
E=V−r
E=Ir−IR
A car battery labelled 12 V is used to supply the electrical energy to an electric motor. Noticed that, only 92 J of energy supply by the battery to move 8 C of charge through the motor. How much the voltage drop due to internal resistance of the battery?
61.3 V
12.8 V
11.5 V
0.5 V
A car battery has an emf of 12V and an internal resistance of 0.005Ω. The terminal voltage when a load current of 100A is drawn is...
11.5 V
1.7 V
6.0 V
0.5 V
What is the value of the internal resistance?
Look at the graph and use it to work out ε and r
E = 0.8V, r = 1.2Ω
E = 1.2V, r = 2.0Ω
E = 1.2V, r = 0.5Ω
E = 0.8V, r = 2.0Ω
Why are different brands of batteries (for example Energiz** and Cheap brand) sold at different prices despite the same 1.5 V label on both batteries?
The graph is obtain after the experiment to investigate the relationship between E (EMF) and r (internal resistance) of a dry cell. From the graph and linear law Y=mX+c, E and r are represent by...
E = Y-intercept
r = gradient
E = gradient
r = Y-intercept
E = X-intercept
r = 1/gradient
E = 1/gradient
r = X-intercept
