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Transcript

1. Ohm’s Law states that the voltage across a conducting material is directly proportional to the current flowing through it, that the constant of proportionality is called as ( ). (a) resistance (b) capacitance (c) inductance 2. If a resistor R in a circuit that some current I flowing through it and the power will be absorbed ( ). (a) R2 I (b) RI (c) RI 2 R1 7V R3 5V 3. To define the current pass through a branch in circuit, that ( ) must be given. (a) a value (b) a direction (c) both (a) and (b) R4 R2 Figure 1.1 4. In Fig. 1.1, the numbers of node, branch and mesh are ( (a) 4,5 and 4 (b) 4, 6 and 3 (c) 4,5 and 3 ). I2 IS R1 5. The circuit showing as Fig. 1.2, if the total current I is known, then the current I2 pass through the resistor R2 will be ( ). (a) I R1 I (b) I 2 R1 I S (c) I 2 R2 I S 2 S R1 R2 R1 R2 R2 R2 Figure 1.2 6. In Fig. 1.2, the two resistors connected in parallel and take values as 10Ω and 15Ω, then combining them in equivalent may be ( ). (a) 25Ω (b) 12.5Ω (c) 6Ω I2 I 7. Three branches connect in a node and the currents labeled in Fig. 1.3, if known as I1=7A and I2=5A, then the current I should be equal to( ) (a) 2A (b) -2A (c) 12A I1 Figure 1.3 8. The electric circuit shown in Fig. 1.4, if the resistance of R is increased, then the voltage V across the resistor will be ( ). (a) decreased (b) increased (c) unchanged + _V 9. A voltage source will be composed a resistor and a voltage in solid value. They are should be connected in ( ). (a) series (b) parallel (c) either (a) or (b) 10. Superposition principle is suitable for ( (a) linearity (b) nonlinearity ) circuits. (c) both above R 0.1A Figure 1.4