BEC Annex 1: Math

The voltage drop across a 330 Ω resistor is measured to be 1.95 V. What is the power being dissipated from that resistor?

• 11.52 mW

• 86.79 mW

• 125.48 mW

• 5.91 mW

If these 5 cells' voltages are measured to be 3 V individually, what is the output voltage?

• 3 V

• 15 V

• 9 V

• 6 V

Each cells' voltage is 9 V. What is the output voltage?

• 9 V

• 27 V

• 3 V

• 0 V

What is the voltage drop across R2?

• 957.45 mV

• 2.87 V

• 5.57 V

• 532.63 mV

If R2 shorts, how will the voltage drop across R1 be affected?

• Increases

• Decreases

• Stays the same

How much current is passing through R2?

• 4.69 mA

• 9.09 mA

• 10.42 A

• 16.28 mA

If a new resistor was added in parallel, how would the voltage and current of R2 be affected?

• Voltage would stay the same, current stay the same

• Voltage would stay the same, current would decrease

• Voltage would increase, current would stay the same

• Voltage would decrease, current would stay the same

What is the power being consumed across R3?

• 2.11 mW

• 43.89 mW

• 3.66 mW

• 1.03 mW

Tags

NGSS.HS-PS3-1

If a new resistor was added in parallel to R3 and R2, how would the voltage and current change across them?

• Voltage would decrease and current would decrease

• Voltage would stay the same and current would decrease

• Voltage would increase and current would increase

• Voltage would increase and current would decrease

Tags

NGSS.HS-PS2-5

If the rheostat is positioned 31% clockwise, how much current is flowing through RL?

• 9.47 mA

• 6.77 mA

• 57.44 mA

• 14.06 mA