# 20060131 quiz03 - dc circuits - UGCS

Electronics - Devices

Oct 7, 2013 (4 years and 7 months ago)

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Ph135b Quiz 03

DC Circuits

1.

At 400 volts, is the dynamic resistance greater or less than at 300 volts for the
non
-
ohmic element of figure 1B? Show calculations or give reasoning to
.

a.

Greater than because
V is increasing faster than
I

b.

Greater than because
I is increasing faster than V

c.

Less
than because
V is increasing faster than I

d.

Less

than because
I is increasing faster than V

What are the maximum current ratings for the 220

and 330

, 1 watt resistors on the
battery board?

2.

max current for 220

:

3.

max current for 330

:

If R1 and R2 are 220

and 330

respectively, calculate the equivalent resistance (
)
and the current through the circuit if the potential is supplied by a sta
ndard car battery
(12V). Also calculate the potential drop across each of the resistors individually (V1 and

4.

equivalent resistance

(
)
:

5.

current through the circuit:

6.

V1:

7.

V2:

If R1 and R2 are 220

and 330

respectively, ca
lculate the equivalent resistance (
),
the current through the circuit, and the current through each resistor if the potential is
supplied by a standard car battery (12V). Show your work.

8.

equivalent resistance

(
)
:

9.

current through the circuit:

10.

cur
rent through R1:

11.

current through R2:

12.

Is a light bulb ohmic or non
-
ohmic?

a.
Ohmic

b.
Non
-
ohmic