Question

If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?
(A) 8 V
(B) 320 V
(C) 3.2 V
D) 32 V

Answer 1

The voltage is 32 V.

Explanation:

Resistance from  120 m.A to 160 m.A  

Voltage = 24 V

So the value of resistance is = 24/ [120 x (10-3)]

= 200 ohms

Now we calculate the new voltage at 200 ohms and current value of 160 m.A

V = IR

V = 200 x 160 = 32,000 m.V

V = 32 V

Thus the voltage is 32 V.

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Three resistor 3 ohms ,4 ohms and 5 ohms are joined in a parallel in an electric circuit.If a current of 150 mA flow through resistor 4 ohms then calculate the value in mA which will be flowing through other two resistors. ?

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