Advertisements
Advertisements
प्रश्न
A battery of e.m.f 16 V and internal resistance 2 Ω is connected to two resistors 3Ω and 6Ω connected in parallel. Find:
- the current through the battery.
- p.d. between the terminals of the battery,
- the current in 3 Ω resistors,
- the current in 6 Ω resistor.
Advertisements
उत्तर
E.m.f. of battery E = 16V, r = 2Ω
Effective resistance of 3Ω and 6Ω connected in parallel R is
`1/"R" = 1/3 + 1/6`
= `3/6`
= `1/2`
∴ R = 2Ω
Total resistance = (R + r)
= (2 +2)
= 4Ω
(a) Current through battery
I = `"V"/("R" + r) = "E"/("R" +r)`
I = `(16V)/(4Ω)`
= 4 A
(b) p.d between terminal of battery
V = IR
= 4 × 2
= 8V
(c) The current in 3Ω resistor
I1 = `"V"/"R"`
= `8/3`
= 2.66 A
(d) The current in 6Ω resistor
I2 = `"V"/"R"`
= `8/6`
= 1.34 A
APPEARS IN
संबंधित प्रश्न
How many 176 Ω resistors (in parallel) are required to carry 5 A on a 220 V line?
In the diagram shown below, the cell and the ammeter both have negligible resistance. The resistor are identical.
Show with the help of diagrams, how you would connect three resistors each of resistance 6 Ω, so that the combination has resistance of (i) 9 Ω (ii) 4 Ω.
State how are the two resistors joined with a battery when potential difference is same across each resistor.
Explain, why is the p.d. between the terminals of a storage battery less when it is supplying current than when it is on open circuit. A battery of e.m.f. 10 volts and internal resistance 2.5 ohms has two resistances of 50 ohms each connected to it. Calculate the power dissipated in each resistance
(a) When they are in series,
(b) When they are in parallel.
In each case calculate the power dissipated in the battery.
Tick (✓) the correct choice among the following :
Consider two cases of two parallel current carrying conductors. Current in
th e same direction and currents in th e opposi te directions will produce
A particular resistance wire has a resistance of 3 ohm per meter. Find the potential difference of the battery which gives a current of 2 A in each of the 1.5 m length when connected in the parallel to the battery (assume that resistance of the battery is negligible).
What connection is used in domestic appliances and why?
You are given four ammeters A, B, C and D having the least counts mentioned below:
(I) Ammeter A with least count 0.25 A
(II) Ammeter B with least count 0.5 A
(III) Ammeter C with least count 0.05 A
(IV) Ammeter D with least count 0.1 A
Which of the ammeters would you prefer for doing an experiment to determine the equivalent resistance of two resistances most accurately, when connected in parallel?
A particular resistance wire has a resistance of 3·0 ohm per metre. Find the resistance of 5 m length of a wire of the same material, but with twice the area of cross section.
