Advertisements
Advertisements
प्रश्न
Calculate the effective resistance between the points A and B in the network shown below in Figure 8.45

Advertisements
उत्तर
In the diagram, 2Ω and 1Ω resistances are in series. The equivalent resistance of the arm R' = 2 + 1 = 3 Ω
Between the points A and B, the equivalent resistance R' (= 3 Ω) is in parallel with 1.5 Ω
Hence, total effective resistance between A and B is
R = `(3 xx 1.5)/(3 + 1.5) = 4.5/4.5 = 1.0 Ω`
संबंधित प्रश्न
Calculate the number of electrons constituting one coulomb of charge.
A student made an electric circuit shown here to measure the current through two lamps.
Are the lamps in series or parallel?
(a) Are the lamps in series or parallel?
(b) The student has made a mistake in this circuit. What is the mistake?
(c) Draw a circuit diagram to show the correct way to connect the circuit. Use the proper circuit symbols in your diagram.

How does the heat H produced by a current passing through a fixed resistance wire depend on magnitude of current I?
Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
Define the term kilowatt - hour and state its value in S.I. unit.
1 kWh = `(1 "volt" xx 1 "ampere" xx "_________")/1000`
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 energy dissipated in the bulb in 10 minutes.
Which part of an electrical appliance is earthed?
Define the following:
Conventional current
