Question 1

The power is ___ if 200 J of energy are used in 10 s.

Accepted Answer

20 W

Question 2

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

Accepted Answer

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.

Question 3

The voltage across a 2.2 kΩ resistor is ___ if 3 mA of current is flowing through it.

Accepted Answer

6.6 V

Question 4

The current is ___ if the voltage across a 5 kΩ resistor is 25 V.

Accepted Answer

5 mA

Ohm's Law Questions