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Question #181Basic Electricity and Electronics

What is the nominal voltage per cell of a fully charged nickel-cadmium battery?

  1. 1.0 volts
  2. 1.2 volts ✓ Correct answer
  3. 1.5 volts
  4. 2.2 volts

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Question #182Radio Theory and Communication Principles

What battery type on this list is not designed to be re-charged?

  1. Nickel-cadmium
  2. Carbon-zinc ✓ Correct answer
  3. Lead-acid
  4. Lithium-ion

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Question #183Radio Theory and Communication Principles

What is required to keep rechargeable batteries in good condition and ready for emergencies?

  1. They must be inspected for physical damage and replaced if necessary
  2. They should be stored in a cool and dry location
  3. They must be given a maintenance recharge at least every 6 months
  4. All of these answers are correct ✓ Correct answer

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Question #184Radio Theory and Communication Principles

What is the best way to get the most amount of energy from a battery?

  1. Draw current from the battery as rapidly as possible
  2. Draw current from the battery at the slowest rate needed ✓ Correct answer
  3. Reverse the leads when the battery reaches the 1/2 charge level
  4. Charge the battery as frequently as possible

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Question #185Basic Electricity and Electronics

What formula is used to calculate current in a circuit?

  1. Current (I) equals voltage (E) multiplied by resistance (R)
  2. Current (I) equals voltage (E) divided by resistance (R) [I=E/R Ohm's Law] ✓ Correct answer
  3. Current (I) equals voltage (E) added to resistance (R)
  4. Current (I) equals voltage (E) minus resistance (R)
Explanation: Ohm’s law rearranged for current is I = E/R.

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Question #186Basic Electricity and Electronics

What formula is used to calculate voltage in a circuit?

  1. Voltage (E) equals current (I) multiplied by resistance (R) [E=I*R Ohm's Law] ✓ Correct answer
  2. Voltage (E) equals current (I) divided by resistance (R)
  3. Voltage (E) equals current (I) added to resistance (R)
  4. Voltage (E) equals current (I) minus resistance (R)
Explanation: Ohm’s law rearranged for voltage is E = I × R.

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Question #187Basic Electricity and Electronics

What formula is used to calculate resistance in a circuit?

  1. Resistance (R) equals voltage (E) multiplied by current (I)
  2. Resistance (R) equals voltage (E) divided by current (I) [R=E/I Ohm's Law] ✓ Correct answer
  3. Resistance (R) equals voltage (E) added to current (I)
  4. Resistance (R) equals voltage (E) minus current (I)
Explanation: Ohm’s law rearranged for resistance is R = E/I; multiplying voltage by current gives power, not resistance.

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Question #188Basic Electricity and Electronics

What is the resistance of a circuit when a current of 3 amperes flows through a resistor connected to 90 volts?

  1. 3 ohms
  2. 30 ohms (As per ohm's law R=E/I, Thus R = 90 Volts / 3 Ampere) ✓ Correct answer
  3. 93 ohms
  4. 270 ohms

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Question #189Basic Electricity and Electronics

What is the resistance in a circuit where the applied voltage is 12 volts and the current flow is 1.5 amperes?

  1. 18 ohms
  2. 0.125 ohms
  3. 8 ohms ✓ Correct answer
  4. 13.5 ohms

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Question #190Basic Electricity and Electronics

What is the current flow in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?

  1. 9600 amperes
  2. 200 amperes
  3. 0.667 amperes
  4. 1.5 amperes ✓ Correct answer

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Question #191Basic Electricity and Electronics

What is the voltage across the resistor if a current of 0.5 amperes flows through a 2 ohm resistor?

  1. 1 volt ✓ Correct answer
  2. 0.25 volts
  3. 2.5 volts
  4. 1.5 volts

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Question #192Basic Electricity and Electronics

What is the voltage across the resistor if a current of 1 ampere flows through a 10 ohm resistor?

  1. 10 volts ✓ Correct answer
  2. 1 volt
  3. 11 volts
  4. 9 volts

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Question #193Basic Electricity and Electronics

What is the voltage across the resistor if a current of 2 amperes flows through a 10 ohm resistor?

  1. 20 volts ✓ Correct answer
  2. 0.2 volts
  3. 12 volts
  4. 8 volts

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Question #194Basic Electricity and Electronics

What is the current flowing through a 100 ohm resistor connected across 200 volts?

  1. 20,000 amperes
  2. 0.5 amperes
  3. 2 amperes ✓ Correct answer
  4. 100 amperes

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Question #195Basic Electricity and Electronics

What is the current flowing through a 24 ohm resistor connected across 240 volts?

  1. 24,000 amperes
  2. 0.1 amperes
  3. 10 amperes ✓ Correct answer
  4. 216 amperes

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Question #196Basic Electricity and Electronics

What is the formula used to calculate electrical power in a DC circuit?

  1. Power (P) equals voltage (E) multiplied by current (I) ✓ Correct answer
  2. Power (P) equals voltage (E) divided by current (I)
  3. Power (P) equals voltage (E) minus current (I)
  4. Power (P) equals voltage (E) plus current (I)

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Question #197Basic Electricity and Electronics

How much power is represented by a voltage of 13.8 volts DC and a current of 10 amperes?

  1. 138 watts ✓ Correct answer
  2. 0.7 watts
  3. 23.8 watts
  4. 3.8 watts

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Question #198Basic Electricity and Electronics

How much power is being used in a circuit when the voltage is 120 volts DC and the current is 2.5 amperes?

  1. 1440 watts
  2. 300 watts ✓ Correct answer
  3. 48 watts
  4. 30 watts

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Question #199Basic Electricity and Electronics

How can you determine how many watts are being drawn by your transceiver when you are transmitting?

  1. Measure the DC voltage and divide it by 60 Hz
  2. Check the fuse in the power leads to see what size it is
  3. Look in the Radio Amateur's Handbook
  4. Measure the DC voltage at the transceiver and multiply by the current drawn when you transmit ✓ Correct answer

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Question #200Basic Electricity and Electronics

How many amperes are flowing in a circuit when the applied voltage is 120 volts DC and the load is 1200 watts?

  1. 20 amperes
  2. 10 amperes ✓ Correct answer
  3. 120 amperes
  4. 5 amperes

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