Electronics - Ohm's Law

Exercise : Ohm's Law - Filling the Blanks
1.
If the voltage across a resistor ___, the current flowing through it will increase.
increases
decreases
stays the same
Not enough information
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
The voltage across a ___ resistor is 12 V and the current through it is 500 mu.gifA.
600 omega.gif
2.4 komega.gif
6 komega.gif
24 komega.gif
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.

The voltage supplying the current in the given circuit is _____.

2.5 V
25 V
250 V
2.5 kV
Answer: Option
Explanation:

V = IR

= 250 x 10^-6 x 100 x 10^3

= 250 x 100 x 10^(-6+3)

= 250 x 100 x 10^-3

= 25 x 1000 x 10^-3

= 25 x 10^3 x 10^-3

= 25 x 10^0

= 25 x 1 [Anything power 0 is 1]

= 25 volts.


4.
The voltage across a 2.2 komega.gif resistor is ___ if 3 mA of current is flowing through it.
6.6 V
7.33 V
1.4 V
0.8 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.

The power rating for the resistor in the given circuit should be at least ___.

1/4 W
1/2 W
1 W
2 W
Answer: Option
Explanation:
No answer description is available. Let's discuss.