Circuit Analysis and Power Calculations

The video tutorial explains how to calculate power dissipation in resistors, diodes, and LEDs. It covers series and parallel circuits, using Ohm's Law and power formulas. The tutorial also discusses determining maximum voltage and current for resistors and calculating power dissipation in diodes and LEDs.

What is the total resistance of a series circuit with resistors of 20 ohms and 10 ohms?

• 10 ohms

• 20 ohms

• 30 ohms

• 40 ohms

In a series circuit with a 60V battery and total resistance of 30 ohms, what is the current flowing through the circuit?

• 3 amps

• 1 amp

• 4 amps

• 2 amps

How much power is dissipated by a 10-ohm resistor with a current of 2 amps flowing through it?

• 30 watts

• 50 watts

• 20 watts

• 40 watts

In a parallel circuit, if the voltage across each resistor is 20 volts, what is the current through a 5-ohm resistor?

• 2 amps

• 3 amps

• 5 amps

• 4 amps

What is the maximum voltage that can be applied to a 220-ohm resistor with a power rating of 0.5 watts?

• 20 volts

• 12 volts

• 15 volts

• 10.49 volts

What is the maximum current that should flow through a 220-ohm resistor with a power rating of 0.5 watts?

• 0.0477 amps

• 0.07 amps

• 0.05 amps

• 0.06 amps

In a series circuit with a 6V battery and a diode with a 0.6V drop, what is the voltage across a 100-ohm resistor?

• 4.4 volts

• 5.4 volts

• 7 volts

• 6 volts

How much power is dissipated by a diode with a 0.6V drop and a current of 0.054 amps?

• 0.038 watts

• 0.036 watts

• 0.034 watts

• 0.0324 watts

In a circuit with a 9V battery and a green LED with a 2V drop, what is the voltage across a 680-ohm resistor?

• 7 volts

• 8 volts

• 5 volts

• 6 volts

What is the power dissipated by a green LED with a 2V drop and a current of 0.01029 amps?

• 21 milliwatts

• 20.6 milliwatts

• 23 milliwatts

• 22 milliwatts