Advertisements
Advertisements
प्रश्न
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).
Advertisements
उत्तर
A current of 2.0 A flows via each of the parallel-connected wires.
Resistance of 1 m wire = 3.0 Ω
Resistance of 1.5 m wire = 3 × 1.5 = 4.5 Ω
I = 2 A
V = IR
= 2 × 4.5
= 9 V
APPEARS IN
संबंधित प्रश्न
Which of the following arrangement, A or B, has the lower combined resistance?
Two resistors, with resistance 5 Ω and 10 Ω respectively are to be connected to a battery of emf 6 V so as to obtain:
(i) minimum current flowing
(ii) maximum current flowing
(a) How will you connect the resistances in each case?
(b) Calculate the strength of the total current in the circuit in the two cases.
A resistor has a resistance of 176 ohms. How many of these resistors should be connected in parallel so that their combination draws a current of 5 amperes from a 220 volt supply line?
A resistor of 8 ohms is connected in parallel with another resistor X. The resultant resistance of the combination is 4.8 ohms. What is the value of the resistor X?
Two exactly similar electric lamps are arranged (i) in parallel, and (ii) in series. If the parallel and series combination of lamps are connected to 220 V supply line one by one, what will be the ratio of electric power consumed by them?
State how are the two resistors joined with a battery when equivalent resistance is less than either of the two resistances.
A cell supplies a current of 1.2 A through two 2Ω resistors connected in parallel. When the resistors are connected in series, if supplies a current of 0.4 A. Calculate the internal resistance and e.m.f of the cell.
The least resistance obtained by using 2 Ω, 4 Ω, 1 Ω and 100 Ω is:
Two resistors having resistance 8 Ω and 12 Ω are connected in parallel. Find their equivalent resistance.
You have three resistors of values 2 Ω, 3 Ω, and 5 Ω. How will you join them so that the total resistance is less than 1 Ω? Draw a diagram and find the total resistance.
