Extech Instruments MT310 Instrukcja Użytkownika Pobierz pdf (Strona 8)

P31220 Lab Name: ________________________________

Lab Section: ________________ T.A.’s ____________________________________________

Today’s Lab Partners: ___________________________________________________________

3. (circle one) Using the circuit in the previous question, would you expect the measured

voltage across the 240Ω resistor to be LARGER, SMALLER, or the SAME as 9V? Explain

your thinking:

4. Typically, r gradually increases as electrical energy is drawn out of the battery.

a. Assume that r = 20Ω. Calculate the current in the circuit. Answer: __________

b. Assume that r = 60Ω. What is the new current in the circuit? Answer: __________

5. Why won’t measuring battery terminals with a voltmeter always tell you whether a battery is

weak? If weak and dead batteries are available, you might try testing them with your DMM.

Report what you did and what you found out below. MAKE SURE THAT THE DMM IS

ON VOLTS!

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Extech Instruments MT310 Instrukcja Użytkownika Strona 8