Question

Qu.1 (ii) parallel combination of three 2 points
resisters R1, R2,and R3 each of 9 ohm
connected to a 3 Omega resistor R4
in series. This combination of
resisters connected to a battery of
6v.lf a voltmeter is connected across
R4 reading of voltmeter will be *
O 6V
O 3V
O 1/3V
O None of the above​

Answer 1

Explanation:

12th

Physics

Current Electricity

Problems on Combination of Resistors

In fig. the equivalent resi...

PHYSICS

In fig. the equivalent resistance of the following combination of resistors r

1

,r

2

,r

3

and r

4

if r

1

=r

2

=r

3

=r

4

=2.0Ω, between the points A and B is

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ANSWER

In this case, the first two resistors of 2 ohms each are connected in series and the third and fourth resistors of 2 ohms each are connected in parallel. The first set is connected in series with the second set of resistors.

The resistances R3 and R4 that are connected in parallel have a resistance given as

2

1

+

2

1

=

1

1

=1ohm. That is, these two resistances is reduced to a single resistance of 1 ohm.

The resistances R1 and R2 that are connected in series have a resistance given as 2+2 = 4 ohms.

This combined resistance when connected in series with reduced resistance of 1 ohm gives a total resistance of 4+1 = 5 ohms.

Hence, the total resistance in the circuit is 5 ohms.

Answer 2

Answer:

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