Advertisements
Advertisements
प्रश्न
If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current?
Advertisements
उत्तर
The current flowing through the conducting wire is
`"I" = "Charge (Q)"/"Time (t)"`
⇒ `"I" = 420/(5 xx 60) = 1.4 "A"`
Hence, the current flowing through the wire is 1.4 A.
APPEARS IN
संबंधित प्रश्न
The SI unit of charge is volt.
Which unit could be used to measure current?
(a) Watt
(b) Coulomb
(c) Volt
(d) Ampere
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.
(c) In which circuit, if one bulb blows out, all other will stop glowing?
Name two devices which work on the heating effect of electric current.
A given wire of resistance 1 Ω is stretched to double its length. What will be its new resistance?
Complete the following sentence:
Fuse wire has a ............ Melting point and it is made of an alloy of ......... and if the current in a circuit rises too high, the fuse wire ...........
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?

A current of 0.3 A is flowing through a branch of 6 Ω resistors in a junction as shown in fig. . Calculate the
(a) P.d. across the junction XY,
(b) Current flowing through 9Ω and 24Ω
( c) P.d. across 24 Ω resistor, and
( d) e.m.f. of the cell.

If a fuse contains a 5 A fuse wire and the voltage is 240 V, what is the maximum power (wattage) which may be taken from the circuit?
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
Name the principle on which a transformer works.
Coulomb is the SI unit of ____________.
An ammeter is always placed in parallel with the circuit.
