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WorksheetsF5 Chapter 3.3 Electromotive force
Total questions: 10
Worksheet time: 24mins
Why must solar cells be arranged in series to form a solar panel?
To reduce the current flow
To reduce the internal resistance
To produce high voltage
To absorb more heat energy
The graph above shows the result in the experiment to determine the electromotive force and internal resistance of a battery. Which pair of the below is correct?
Emf= 8V, r= 1Ჲ
Emf= 10V, r=-1Ჲ
Emf= 10V, r=1Ჲ
Emf= 1V, r=10Ჲ
Which of the following can use to determine the electromotive force ?
A
B
C
D
Diagram below shows the Voltmeter reading of a circuit when the switch is open and closed. When the switch is closed, current of 0.4A flow through the bulb. What is the value of the internal resistance?
0.2Ჲ
0.4Ჲ
0.5Ჲ
0.8Ჲ
What is the reading of the voltmeter below?
5V
8V
10V
12V
Diagram below show a cell of emf 1.5V and internal resistance of 1 Ჲ. The switch is closed so the current can flow through the bulb. What is the reading on the voltmeter when the switch is closed?
0V
1.5V
more than 1.5V
less than 1.5V
Which of the following in the table below show the correct reading of v1 and v2?
A
B
C
D
When the switch is open V1=1.5V, when the switch is closed, V1=1.2V and A= 0.3A. What are the values of R and r?
A
B
C
D
What will happen if the dry cells are connected in parallel.
Electromotive force increase, internal resistance increase
Electromotive force increase, internal resistance decrease
Electromotive force remain same, internal resistance increase
Electromotive force remain same, internal resistance decrease
The advantage of connect the dry cells in series is
the dry cell can last longer
more energy supply
can reduce the internal resistance
can increase the internal resistance
