Advertisements
Advertisements
प्रश्न
The figure given below shows an electric circuit in which current flows from a 6 V battery through two resistors.
- Are the resistors connected in series with each other or in parallel?
- For each resistors, state the p.d. across it.
- The current flowing from the battery is shared between the two resistors. Which resistor will have bigger share of the current?
- Calculate the effective resistance of the two resistors.
- Calculate the current that flows from the battery.
Advertisements
उत्तर
- The resistors are connected in parallel.
- In a parallel arrangement, the voltage remains the same across each resistor. The battery is also connected in parallel with the resistors. Therefore, the p.d across each resistor is 6 V.
- The 2 Ω resistor will have the bigger share of the current since resistance is inversely proportional to the current.
- The effective resistance of the parallel combination is: `1R=1R_1+1R_2 1R=12+13 1R= 3 + 261 R = 56R = 65Ω R = 1.2 Ω `
`1/R=1/R_1+1/R_2`
`1/R=1/2+1/3`
`1/R=3+2/6`
`1/R=5/6`
`R=6/5` Ω
`R=1.2` Ω - The current flowing through the battery, I = 5 A
APPEARS IN
संबंधित प्रश्न
In which direction does conventional current flow around a circuit?
Which of the following equation shows the correct relationship between electrical unit?
1A = 1C/s or 1c= 1A/s
How many milliamperes as there in 1 ampere?
Which statement/statement is/are correct?
1. An ammeter is connected in series in a circuit and a voltmeter is connected in parallel.
2. An ammeter has a high resistance.
3. A voltmeter has a low resistance.
(a) 1, 2, 3
(b) 1, 2
(c) 2, 3
(d) 1
An electric circuit consisting of a 0.5 m long nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V each and a plug key was set up.
(i) Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points 'X' and 'Y' and the electric current flowing through XY.
Which is the better way to connect lights and other electrical appliances in domestic wiring: series circuits or parallel circuits? why?
A given wire of resistance 1 Ω is stretched to double its length. What will be its new resistance?
Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
In the circuit shown in fig. 6, find the reading of the ammeter A when the switch S is
(a) Opened.
(b) Closed.
Calculate the current through a 60 W lamp rated 250 V. If the line voltage falls to 200 V, how is power consumed by the bulb affected?
An electric iron is rated 750 W, 230 V. Calculate the electrical energy consumed by the press in 16 hours.
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.
At the time of short circuit, the electric current in the circuit ______.
Two electric bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to electric mains of 220 V. Find the current drawn by the bulbs from the mains.
What are the effects of electric current?
