Question

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Answer 1

Answer:

1. The 12Ω and 6Ω resistors are in parallel, so their equivalent resistance is R

1

=12×6/(12+6)=4Ω.

The 7Ω and 5Ω resistors are in series, so their equivalent resistance is R

2

=7+5=12Ω.

The R

1

=4Ω and R

2

=12Ω are in parallel, so their equivalent resistance is R

3

=12×4/(12+4)=3Ω

Now this R

3

=3Ω and 7Ω are in series, so the equivalent resistance is 7+3=10Ω

So the equivalent resistance of circuit is 10.

2.By Ammeter reading we mean reading of the deflection of the magnetic needle which takes place because of the intensity of the magnetic field which takes place in the ammeter coil because of the amount of current flowing.

3. Reading of voltmeter is the potential difference across a combination of 100Ω and 200Ω resistor. Thus, reading of voltmeter by using Ohm's Law is, V=10033200. ⇒V=2V. Thus reading of voltmeter is 2V.

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