Mid-term exam Principles of Electricity (cont'd) 6. How much voltage would be required to produce 25A in a circuit with 4.80 total resistance? a. 120A b. 120V C. 1200 d. 1201 7. As resistors are added to a parallel circuit, what will happen to the current? a. The current will increase b. The current will decrease c. The current will stay the same d. There is not enough information given 8. If a short takes place across a resistor, in a series circuit, what will happen to the current? a. The current will increase b. The current will decrease c. The current will stay the same d. There is not enough information given 9. What will be the voltage drop across a 30 resistor which draws 4A of current? ith 19.20 a. 7V b. 0.375V C. 1.25V d. 12V 10. What is the total resistance of four (4) 250 resistors connected in parallel? circult, what a. 1000 the b. 6250 C. 6.250 d. 0.160 information given

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KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.