Advertisements
Advertisements
प्रश्न
Find the effective resistance in the following circuit diagrams (Fig.):

Advertisements
उत्तर
In the given network, the parallel combination of two 2 Ω resistors is
connected in series with the parallel combination of two 3 Ω resistors.
:. Resistance in parallel of two 2Ω resistors is:
`1/"R"_"P" = 1/2 + 1/2 = 2/2 = 1`
Rp = 1Ω
Resistance in parallel of two 3Ω resistors is:
`1/"R"_"P" = 1/3 + 1/3 = 2/3`
`"R"_"P"' = 3/2 Ω`
Total resistance of the network
`"R"_"total" = 1 + 3/2 = 5/2 Ω`
APPEARS IN
संबंधित प्रश्न
By what name is the physical quantity coulomb/second called?
Using the circuit given below, state which of the following statement is correct?

(a) When S1 and S2 are closed, lamps A and B are lit.22
(b) With S1 open and S2 closed, A is lit and B is not lit.
(c) With S2 open and S1 closed A and B are lit.
(d) With S1 closed and S2 open, lamp A remains lit even if lamp B gets fused.
Consider the circuit given below when A, B and C are three identical light bulbs of constant resistance.
(a) List the bulbs in order of increasing brightness.
(b) If C burns out, what will be the brightness of A now compared with before?
(c) If B burns out instead, what will be the brightness of A and C compared with before?
If the current passing through a conductor is doubled, what will be the change in heat produced
A bulb is connected to a battery of p.d. 4 V and internal resistance 2.5 Ω . A steady current of 0.5 A flows through the circuit. Calculate:
The resistance of the bulb
Answer the following question.
An electric lamp of resistance 20 Ω and a conductor of resistance 4 0 are connected to a 6 V battery as shown in the circuit. Calculate: 
(a) the total resistance of the circuit,
(b) the current through the circuit,
(c) the potential difference across the (i) electric lamp and (ii) conductor, and
(d) power of the lamp.
The value used for practical measurement of Alternating Current is the:
