Question

three resistor 5 ohm 10 ohm and 15 ohm are connected in series and the combination is connected to a battery of 30 volts.Ammeter and voltmeter are connected . What is the readings in ammeter and voltmeter if voltmeter is connected across 10ohm.

Answer 1

Answer:

Explanation:

Ammeter = 1 A

Voltmeter = 10 V

Answer 2

The readings in ammeter and voltmeter if voltmeter is connected across 10ohm will be 1 ampere in ammeter and 10 volts in the voltmeter.

It is given that,

We have three resistors such as

R1 = 5 ohm, R2 = 10 ohm, R3 = 15 ohm

These three resistors are connected in series, therefore the net resistance will be equal to

Rt = R1 + R2 + R3

Rt = 5 + 10 + 15 = 30 ohm

Now,

The voltage across the connection is 30V

By using the formula

voltage = current x resistance we have

current = voltage / resistance

current = 30 / 30 = 1 ampere

Now as this is a series connection current will be the same throughout.

Therefore the ammeter reading will be 1 ampere

Now when we connect the voltmeter across the 10-ohm resistor we have

resistance = 10 ohm

current = 1 ampere

Therefore voltage = resistance x current

voltage = 10 x 1 = 10 Volts

Therefore the voltmeter reading will be 10 volts.