* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

# Download 1. Ohm`s Law states that the voltage across a conducting material is

Survey

Document related concepts

Negative resistance wikipedia, lookup

Galvanometer wikipedia, lookup

Transistor–transistor logic wikipedia, lookup

Schmitt trigger wikipedia, lookup

Power electronics wikipedia, lookup

Josephson voltage standard wikipedia, lookup

Operational amplifier wikipedia, lookup

Valve RF amplifier wikipedia, lookup

Switched-mode power supply wikipedia, lookup

Wilson current mirror wikipedia, lookup

Opto-isolator wikipedia, lookup

Two-port network wikipedia, lookup

Surge protector wikipedia, lookup

Electrical ballast wikipedia, lookup

Resistive opto-isolator wikipedia, lookup

Power MOSFET wikipedia, lookup

Current source wikipedia, lookup

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