Advertisements
Advertisements
प्रश्न
What actually travels through the wires when you switch on a light?
Advertisements
उत्तर
When we switch on a light, electrons travel through the wires. The flow of these electrons is called electric current.
APPEARS IN
संबंधित प्रश्न
1 A = _________ mA
- 102
- 103
- 10-3
- 10-6
What is the unit of electric current?
Why should the resistance of:
an ammeter be very small?
If the current through a floodlamp is 5 A, what charge passed in 10 seconds?
(a) 0.5 C
(b) 2 C
(c) 5 C
(d) 50 C
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.
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.
(d) Which circuit would have less current in it?
How does the heat H produced by a current passing through a fixed resistance wire depend on magnitude of current I?
What is international convention of colour coding in a cable?
Tick(✓) the correct choice in the following:
A three pin plug is connected to the lead for a 1 kW electric iron to be
used on a 250 V supply. Which of the following statements is not correct?
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?
1 kWh = `(1 "volt" xx 1 "ampere" xx "_________")/1000`
State the conditions for the flow of charge in a circuit from one point to the other.
Give the electric current unit.
The SI unit for electric current is the coulomb.
Problems for practice:
If 5A current flows through a circuit, then convert the current in terms of microampere?
The number of electrons constituting a 1-coulomb charge is ______.
Find the odd one out.
Loudspeaker, Bar magnet/magnet, Electric motor, Microphone.
What does the direction of current convey?
