Advertisements
Advertisements
प्रश्न
A current of 4 A flows around a circuit for 10 s. How much charge flows past a point in the circuit in this time?
Advertisements
उत्तर
Here:
Current, I = 4 A
Time, t = 10 s
We know that I = Q/t.
So:
4 = Q/10
or Q = 4 x 10 = 40 C
Thus, the amount of electric charge that flows through the circuit is 40 coulombs.
APPEARS IN
संबंधित प्रश्न
Which of the following units could be used to measure electric charge?
(a) ampere
(b) joule
(c) volt
(d) coulomb
What actually travels through the wires when you switch on a light?
What is the current in a circuit if the charge passing each point is 20 C in 40 s?
How many electrons are flowing per second past a point in a circuit in which there is a current of 5 amp?
In the circuit diagram given below five resistances of 10 Ω, 40 Ω, 30 Ω, 20 Ω, and 60 Ω are connected as shown to a 12 V battery.
Calculate:
(a) total resistance in the circuit.
(b) total current flowing in the circuit.
What happens to the other bulbs in a series circuit if one bulb blows off?
Give three reasons why different electrical appliances in a domestic circuit are connected in parallel.
Calculate the effective resistance between the points A and B in the network shown below in Figure 8.45
Calculate the equivalent resistance between A and B in the adjacent diagram.
A cell supplies a current of 1.2 A through two 2 Ω resistors connected in parallel. When the resistors are connected in series, it supplies a current of 0.4 A. Calculate:
(i) the internal resistance and (ii) e.m.f. of the cell.
Define the following:
Super conductors
Find the effective resistance in the following circuit diagrams (Fig.):
Two cells each having an e.m.f. of 2 V and an internal resistance of 2Ω are
connected (a) In series, and ( b) In para 1le l as shown in fig. . What is the
current flowing through the cir cu it in each_ case?
Name the principle on which a transformer works.
State whether the current is a scalar or vector?
A geyser is rated 1500 W, 250 V. This geyser is connected to 250 V mains. Calculate:
- The current drawn,
- The energy consumed in 50 hours, and
- The cost of energy consumed at ₹ 4.20 per kWh.
Define the following:
Conventional current
