# Preparation

### Ohm’s Law Objective Questions

1. If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?A. 32 VB. 8 VC. 320...

### Series Circuits Objective Questions

1. There are five resistors in a given series circuit and each resistor has 6 V dropped across it. The source voltageA. is 30 VB. is 6 VC. depends on the current flowD. depends on the resistor values (Answers...

### Series-Parallel Circuits Objective Questions

1. When a load resistance is removed from the output of a voltage divider circuit, the current drawn from the sourceA. is cut offB. remains the sameC. decreasesD. increases (Answers will be displayed at the end of the question’s)...

### Branch, Loop and Node Analyses Objective Questions

1. What is the voltage drop across R3?A. 180 mVB. 180 mVC. 112 mVD. 11.25 V (Answers will be displayed at the end of the question’s)2. What is the current through R2?A. 125 mAB. 500 mAC. 250 mAD. 177 mA3. Find branch current IR2.A. 119.6 mAB. 113.0 mAC. –5.4 mAD. 5.4...

### Alternating Current and Voltage Objective Questions

1. A sawtooth wave has a period of 10 ms. Its frequency isA. 100 HzB. 10 HzC. 1,000 HzD. 50 Hz (Answers will be displayed at the end of the question’s) 2. A sine wave of 15 kHz is changing...

### Inductors Objective Questions

1. The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil isA. 18 mVB. 1.25 mVC. 1.8 mVD. 180 mV (Answers will be displayed at the end of...

### RC Circuits Objective Questions

1. When the frequency of the voltage applied to a series RC circuit is increased, the phase angleA. becomes erraticB. increasesC. remains the sameD. decreases (Answers will be displayed at the end of the question’s)2. A resistor and a capacitor are in...

### RLC Circuits and Resonance Objective Questions

1. A 24 ohm resistor, an inductor with a reactance of 120 ohm, and a capacitor with a reactance of 120 ohm are in series across a 60 V source. The circuit is at resonance. The voltage across the...

### Circuit Theorems in AC Analysis Objective Questions

1. Referring to the given circuit, how much power, in watts, is delivered to the speaker at the determined frequency if VS = 4.5 VRMS?A. 4.24 mWB. 424 mWC. 226 mWD. 2.26 mW (Answers will be displayed at the end of...

### Three-Phase Systems in Power Applications Objective Questions

1. In a Y-connected circuit, between each line voltage and the nearest phase voltage, there is a phase angle ofA. 120°B. 60°C. 30°D. 0° (Answers will be displayed at the end of the question’s) 2. In a certain Y-Y system,...

### Voltage, Current and Resistance Objective Questions

1. A material that does not allow current under normal conditions is a(n)A. valenceB. semiconductorC. insulatorD. conductor (Answers will be displayed at the end of the question’s)2. A two-terminal variable resistor is known as aA. wiperB. rheostatC. potentiometerD. thermistor3. An ohmmeter is an instrument for...

### Energy and Power Objective Questions

1. If it takes 400 ms to use 12,000 J of energy, the power iZA. 300 kWB. 30 kWC. 30 WD. 3 W (Answers will be displayed at the end of the question’s)2. A 6 V battery is connected...

### Parallel Circuits Objective Questions

1. Four 8 ohm speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers is 12 V, the amplifier must be able to deliver to the speakersA. 48...

### Circuit Theorems and Conversions Objective Questions

1. Referring to the given circuit, determine VTH and RTH if a 68 ohm resistor is connected in parallel across R2 and R3.A. 330 mV, 68 ohmB. 330 mV, 148 ohmC. 3.3 V, 148 ohmD. 3.3 V, 68 ohm (Answers will be displayed at the end of the question’s)2. Find RN for the circuit given.A. 154 ohmB. 120 ohmC. 34 ohmD. 68 ohm3. Find...

### Magnetism and Electromagnetism Objective Questions

1. There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400 Wb?A. 90,000 At/WbB. 14,400 At/WbC. 1,440 At/WbD. 9,000 At/Wb (Answers will be displayed at the...

### Capacitors Objective Questions

1. A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the currentA. decreasesB. ceasesC. increasesD. remains constant (Answers will be displayed at the end of the question’s) 2. When the voltage across a...

### Transformers Objective Questions

1. The primary winding of a power transformer should always beA. shortedB. fusedC. openD. switched (Answers will be displayed at the end of the question’s)2. How many primary volts must be applied to a transformer with a turns ratio of...