A/an ______________________________________ changes the intensity of alternating voltage and current.
A. transformer.
B. conductor.
C. Solenoid.
D. ammeter.

..On the results I was observing? I decided to change the temperatures of the solutions in which I was placing the metal strips into. As the temperature increased my voltmeter reading decreased, is this normal and why?

A. 2000 ohms
B. 3000 ohms
C. 4000 ohms
D. 5000 ohms

A voltmeter with a 20V full scale indication at 1mA has an internal resistance of 1500 ohms. What multiplier resistor value is required for the voltmeter?
A. 20000 ohms
B. 18500 ohms
C. 2000 ohms
D. 1850 ohms

A 0-1 mA meter with an internal resistance of 1000 ohms is converted to a 0-10mA meter.
What is the value of shunt resistance needed for full-scale deflection at 10mA?
A. 144.4 ohms
B. 111.1 ohms
C. 0.144 ohms
D. 0.111 ohms

An ohmmeter is connected in…
A. Series with the component being measured
B. Parallel with the voltage source
C. Series/parallel to the circuit
D. Parallel with the component being measured

A voltmeter uses a 1mA, 1500 ohms meter movement. What total circuit resistance is required for a 20V full scale indication?
A. 20 ohms
B. 200 ohms
C. 2000 ohms
D. 20000 ohms

To connect an ammeter in a circuit…
A. Open the circuit at one point and insert the ammeter to complete the circuit.
B. Attach the test leads across the component to be measured
C. Remove the power from the circuit
D. Attach the test leads across the voltage source

An ohmmeter is adjusted for zero ohms when
A. The test leads are shorted
B. The test leads are open
C. A known resistance is measured
D. Circuit power is off

A multiplier for a voltmeter is…
A. A high resistance in parallel with the meter movement
B. Usually less than the meter resistance
C. A high Resistance in series with the meter movement
D. Usually equal to the meter Resistance

A milliammeter shunt…
A. Decreases the range
B. Is connected in series with the meter
C. Increases the range
D. converts the meter to a voltmeter

What is the current flowing in an ohmmeter when it indicates infinite Resistance
A. Minimum
B. Maximum
C. Halfway between minimum and maximum
D. None of the above

Please answer as many questions as you can. It would really mean a lot to me if you could me with these questions.
Thanks

A voltmeter containing silver trioxonitrate (v) solution was connected in series to another voltameter containing copper (ii) tetraoxosulphate (vi) solution.when a current of 0.2A was passed through the solutions, 0.780g of silver was deposited. Calculate the : (1) mass of copper that would be deposited in the copper voltmeter. (2 ) quantity of electricity used and the time of current flow (cu= 63.5 , Ag= 108 ; 1f = 96500c

if I have a bunch of 20k resistors and I want to match two as closely as possible

I have a multimeter with a resolution of 100 ohms (200k ohms range). And I switch around the resistors until I can get the current across the bridge down to zero (resolution 0.1 micro amps).

Is there a way I can calculate the maximum theoretical error (in matching) under these conditions?

I just want them to MATCH. It is not the absolute value that I am worried about!
If the resistors do not match, then there is a current. Can the error in resistance be related to the measured current?
lee26loo ??????? I comes from Qin Dynasty: trying different 20k resistors in the same place is pretty much the same as using a potentiometer!

In the circuit, a batt, switch, ammeter, resistor and a voltmeter parallel to the resistor.

I need about 3 errors that can/may happen in this circuit.

So far I got:
One of the components are broken/not working properly. –> circuit fails.

http://imagepaste.nullnetwork.net/viewimage.php?id=2868

both the Ammeter & the voltmeter are ideal.

1. What will be the reading of the voltmeter (V) ?

2. What will be the reading of the Ammeter (A) ?
Rick If Ammeter reads 9 Amps then

Voltage = IR = 9*(4+4) = 72 V

Bt the voltage source is 36 V … So i guess its worng … If not, can u xplain why ?

Right now I have battery load tester, a battery tester, two multimeter’s from fluke, 30 inch alligator clamp test leads very useful, test light, battery charger that’s full size trickle fast and jump start options, and a wire cutter & crimper.

What else am I missing for basic electrical tools for working on cars?
Well I know basic diagnostics but im going to take a full 5 day a week electrical class.

Pretty much I am doing a science fair project and it is: How does the length of a wire affect the flow of electricity? I know i need a voltmeter to measure the voltage, but I also heard that resistance is involved too. Can someone tell me what resistance is exactly and how to measure it? I want to know which one do I measure.

For an ‘AA’ sized dry cel of V=1.5v,hav an e.m.f=0.7v,and internal resistance=0.9ohms after the cell is used? Also,in my exams tht’s how i answered,i thnk there was somethng wröng with ammeter reading,others used manipulative ways to forge their answers,can the teachers mark tht answer,cause it affects me evrytime i thnk about it,please help,n thank u!