The central knob of digital multimeter has several positions. To measure small current, set the multimeter to (). To measure large current, set the multimeter to 20A.
A. Ω
B. mA
C. V ( V-V~ )
D. 20A
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The resistance of a light sensor in bright light is () that in the dark.
A. larger than
B. the same as
C. smaller than
D. 10000 times higher than
To measure current, the circuit must be broken to allow the meter to be connected in series. To measure (), the circuit is not changed, the meter is connected in parallel. To measure resistance, the component must be removed from the circuit.
A. resistance
B. voltage
C. current
D. sensor
The four 10 kilo-ohms resistors are connected in () on the breadboard in the textbook.
A. series
B. parallel
C. measure
D. COMMON
矿业企业的劳动定员有( )。
A. 生产工人
B. 工程技术人员
C. 管理人员
D. 服务人员