Excel in math and science.

Join using Facebook Join using Google Join using email

Forgot password? New user? Sign up

Existing user? Log in

Your answer seems reasonable. Find out if you're right!

That seems reasonable. Find out if you're right!

Join using Facebook Join using Google Join using email

Forgot password? New user? Sign up

Existing user? Log in

Electricity and Magnetism

Circuit Behavior

Concept Quizzes

Kirchoff's Current Law (conservation at nodes)
Kirchoff's Voltage Law (closed loops)
Series and parallel resistors
Series and parallel capacitors
RC circuits (direct current)
Circuit Behavior - Problem Solving

Challenge Quizzes

Circuit Behavior: Level 2-3 Challenges
Circuit Behavior: Level 4-5 Challenges

Kirchoff's Voltage Law (closed loops)

The above circuit consists of resistors and a voltage source. If voltage source is given as $V = 16 \text{ V}$ and the resistances are given as $R_1 = 2 \Omega$ and $R_2 = 4 \Omega,$ what is the current passing through the resistor $R_1?$

12 \text{ A}

4 \text{ A}

8 \text{ A}

2 \text{ A}

Show explanation

View wiki

by Brilliant Staff

Consider the circuit shown in the figure above. The voltages and currents are $v_2 = -2 \text{ V}, v_3 = 8 \text{ V}, v_6= 12 \text{ V}, i_3 = i_4 = i_5 = 4 \text{ A}.$ Determine the values of the voltage across the circuit element $E.$

8 \text{ V}

-6 \text{ V}

2 \text{ V}

-12 \text{ V}

Show explanation

View wiki

by Brilliant Staff

The above circuit consists of resistors and voltage sources. The voltages are given as $V_1 = 32 \text{ V}$ and $V_2 = 16 \text{ V},$ and the resistances are given as $R_1 = 2 \Omega, R_2 = 4 \Omega$ and $R_3 = 6 \Omega.$ What is the voltage across the resistor $R_3?$

8 \text{ V}

12 \text{ V}

6 \text{ V}

10 \text{ V}

Show explanation

View wiki

by Brilliant Staff

In the above circuit, the voltage source gives $V = 7 \text{ V}.$ When the resistance is given by $R = 2 \Omega,$ what is the voltage $V_R$ across the resistor?

9 \text{ V}

5 \text{ V}

11 \text{ V}

7 \text{ V}

Show explanation

View wiki

by Brilliant Staff

The above circuit consists of resistors and voltage sources. The voltage sources are given as $V_1 = 90 \text{ V}$ and $V_2 = 18 \text{ V},$ and the resistances are given as $R_1 = 3 \Omega, R_2 = 6 \Omega$ and $R_3 = 9 \Omega.$ What is the current flow through the resistor $R_3?$

Assume that the ground is at the node under the voltage sources.

7 \text{ A}

6 \text{ A}

3 \text{ A}

4 \text{ A}

Show explanation

View wiki

by Brilliant Staff