Ohm's Law - 1

Question 1

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?

Answer 1

4 Megohms

Question 2

Which of the following Ohms Law formulas is incorrect?
R= E/ I
I= R/ E
E= I x R
I= E/ R

Answer 2

I= R/ E

Question 3

If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor?

Answer 3

100 Volts

Question 4

If a 100-ohm resistor is connected across 200 volts, what is the current through the resistor?

Answer 4

2 amperes

Question 5

If a current of 3 amperes flows through a resistor connected to 90 volts, what is the resistance?

Answer 5

30 Ohms

Question 6

A relay coil has 500 ohms resistance, and operates on 125 mA. What value of resistance should be connected in series with it to operate from 110 V DC?

Answer 6

380 Ohms