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
Define the unit of current.
In which direction does conventional current flow around a circuit?
How many microamperes are there in 1 ampere?
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.
Following graph was plotted between V and I values:
What would be the values of `V/I` rations when the potential difference is 0.8 V, 1.2 V and 1.6 V respectively?
What conclusion do you draw from these values?
What is the resistance of the wire?
A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is:
(a) 0.5 Ω
(b) 6 Ω
(c) 12 Ω
(d) 24 Ω
If the lamps are both the same in the figure given below and if A1 reads 0.50 A, what do A2, A3, A4 and A5 read?
An electric bulb is rated as 10 W, 220 V. How many of these bulbs can be connected in parallel across the two wires of 220 V supply line if the maximum current which can be drawn is 5 A?
In the network shown in the following adjacent Figure, calculate the equivalent resistance between the points.
- A and B
- A and C
Find the effective resistance in the following circuit diagrams (Fig.):
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
An electric bulb is marked '100 W, 250 V'. What information does this convey?
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.
Which part of an electrical appliance is earthed?
State the conditions for the flow of charge in a circuit from one point to the other.
______ is used to measure the electric current.
Conventionally, the direction of the current is taken as:
A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly
