Physics_B_062625

Power is directly proportional to ...

• Power

• Voltage

• Current

What is the power of a 20V bulb with 5A through it?

• 100W
• 100V
• 6.3W
• 6.3A

A student creates a circuit with a variable voltage supply and a 2 ohm resistor. The student varies the voltage and measures the current. The graph shows the student’s results. What was the greatest power supplied by the battery?

• 2 W

• 4 W

• 8 W

• 16 W

What is the power of a 20V bulb with 5A through it?

• 100W
• 100V
• 6.3W
• 6.3A

Two resistors of 5Ω and 15Ω are connected in series to a 10V battery. What is the total resistance and the power dissipated in the circuit?

• Total resistance = 20Ω, Power dissipated = 5W

• Total resistance = 10Ω, Power dissipated = 10W

• Total resistance = 7.5Ω, Power dissipated = 13.3W

• Total resistance = 20Ω, Power dissipated = 2.5W

A 24V battery is connected to a resistor of 8Ω. What is the current through the resistor and the power consumed?

• Current = 3A, Power = 72W

• Current = 2A, Power = 48W

• Current = 4A, Power = 96W

• Current = 1.5A, Power = 36W

Tags

NGSS.HS-PS3-2

In a parallel circuit, two resistors of 12Ω and 4Ω are connected across a 16V supply. What is the total power dissipated in the circuit?

• 32 W

• 64 W

• 80 W

• 48 W

A 9V battery is connected to a 3Ω resistor. What is the power dissipated by the resistor?

• 18 W

• 9 W

• 3 W

• 27 W

Two resistors of 8Ω and 12Ω are connected in parallel to a 24V supply. What is the total power consumed by the circuit?

• 48 W

• 96 W

• 72 W

• 120 W

A circuit has a current of 4A and a resistance of 5Ω. What is the power dissipated in the circuit?

• 20 W

• 16 W

• 80 W

• 9 W