F2 IS WS14 Answers

1st Term WS 14 Submission date：_____________ Name：______________________ Class & no.：2 _________(     )

8.3       Voltage

i      Words to know:

	English term	Write the words again	Chinese term
1	Voltage		電壓
2	Volt (V)		伏特
3	Kilovolt (kV)		千伏特
4	Millivolt (mV)		毫伏特
5	Voltmeter		伏特計
6	Negative pole		負極
7	Electric current		電流

i      Fill in the blanks:

1       In a closed circuit, the dry cell ‘pushes’ free electrons to flow through the circuit. The dry cells which give a stronger ‘push’ to the free electrons have larger voltage.

2       Voltage is measured in volts (V). Large voltages are measured in kilovolts (kV) while small voltages are measured in millivolts (mV)

3       voltmeter is an instrument used to measure voltage. Its circuit symbol is 

4       When more dry cells are connected in the same direction, the total voltage is higher.

5       The higher the voltage, the larger the electric current flowing through a circuit, provided that other conditions are the same.

i      Challenging question:

             Draw a circuit diagram to show how to measure the voltage and the current of a circuit which has two dry cells connected with a light bulb and a switch at the same time.