What value of series resistor would be...

Question 1 / 270701MQnjgOc0TDv96gkGpQf

Question 1 of 270701MQnjgOc0TDv96gkGpQf

What value of series resistor would be needed to obtain a full scale deflection on a 50 microamp DC meter with an applied voltage of 200 volts DC?

Back

Question 1 of 27070

What value of series resistor would be needed to obtain a full scale deflection on a 50 microamp DC meter with an applied voltage of 200 volts DC?

🔍 Key Concepts

• Use Ohm’s Law to relate voltage, current, and resistance: V = I × R • Understand that the full-scale deflection current of the meter is 50 microamps (50×10⁻⁶ A) • You are adding a series resistor so that the meter plus resistor together can be used as a voltmeter for 200 V DC

💭 Think About

• First, think about what current is allowed to flow through the meter movement at full scale and how that limits the total current in the circuit • Then, use V = I × R to find the total resistance needed so that 200 V will produce only 50 microamps • Finally, consider whether the meter movement itself has resistance, and what the question is asking you to calculate in relation to that

✅ Before You Answer

• Compute the required total circuit resistance using V = I × R with 200 V and 50 microamps; check your units carefully • Convert between ohms, kilohms, and megohms correctly before comparing to the options • Confirm whether the problem is effectively asking for the series resistor value alone (assuming the meter resistance is negligible or given/ignored) or the total resistance; match that to the closest answer choice

Question 1 of 27070

What value of series resistor would be needed to obtain a full scale deflection on a 50 microamp DC meter with an applied voltage of 200 volts DC?

4 megohms.

2 megohms.

400 kilohms.

200 kilohms.

Question 1 / 270701MQnjgOc0TDv96gkGpQf

Question 1 of 270701MQnjgOc0TDv96gkGpQf

What value of series resistor would be needed to obtain a full scale deflection on a 50 microamp DC meter with an applied voltage of 200 volts DC?

Back

Question 1 of 27070

What value of series resistor would be needed to obtain a full scale deflection on a 50 microamp DC meter with an applied voltage of 200 volts DC?