True/False
Indicate whether the
statement is true or false.
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1.
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The Wheatstone bridge circuit is used to make precise measurements of a
resistor’s value using four resistors, a dc voltage source, and a galvanometer.
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2.
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An ammeter measures current and must be placed in parallel with the current
being measure.
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3.
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A voltmeter measures voltage and must be placed in parallel with the voltage
being measured.
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4.
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An ideal voltmeter has infinite internal resistance and thus does not alter the
voltage bing measured.
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5.
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An ideal ammeter has infinite internal resistance and thus does not alter the
current being measured.
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Completion
Complete each
statement.
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6.
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Series-connected circuits carry the same __________.
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7.
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An electrical engineer uses the term ________ box to imply an opaque container;
that is, the contents are hidden from view.
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8.
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Parallel-conected circuit elements have the same _______ across their
terminals.
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9.
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Resistors in parallel can be reduced to a _________ equivalent resistor using
Kirchhoff’s current law and Ohm’s law.
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10.
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Note that the resistance of the equivalent resistor is always smaller than the
resistance of the ___________ resistor in the parallel connection.
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11.
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At times - especially in electronic circuits - developing more than one voltage
level from a single voltage supply is necessary. One way of doing this is by using a voltage-
_________ circuit.
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12.
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A load on any circuit consists of ______ or more circuit elements that draw
power from the circuit.
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13.
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Another characteristic of the voltage-divider circuit of interest is the
sensitivity of the divider to the ___________ of the resistors.
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14.
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By tolerance we mean a ________ of possible values.
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15.
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The current-divider circuit consists of two resistors connected in parallel
across a current ____________.
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16.
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An ammeter is an instrument designed to measure current; it is placed in
___________ with the circuit element whose current is being measured.
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17.
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A voltmeter is an instrument designed to measure voltage; it is placed in
___________ with the element whose voltage is being measured.
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18.
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An ideal ammeter or voltmeter has no effect on the circuit variable it is
designed to __________.
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19.
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Digital meters measure the continuous voltage or current signal at discrete
points in time, called the __________ times.
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20.
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Analog meters are based on the d’Arsonval meter movement which implements
the readout ___________.
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21.
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The Wheatstone bridge circuit is used to precisely measure _________ of medium
values, that is, in the range of 1W to 1MW.
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22.
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In a Wheatstone Bridge, the detector is generally a d’Arsonval movement in
the microamp range and is called a ______________.
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23.
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In a Wheatstone Bridge, the interconnected resistors can be reduced to a single
equivalent resisto by means of a delta-to-______ or a pi-to-tee equivalent circuit.
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