Advertisements
Advertisements
Question
An electric current flowing in a wire creates ______ around the wire.
Advertisements
Solution
An electric current flowing in a wire creates magnetic field around the wire.
RELATED QUESTIONS
What actually travels through the wires when you switch on a light?
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?
One coulomb of charge flows through any cross-section of a conductor in 1 second. What is the current flowing through the conductor?
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?
Using the circuit given below, state which of the following statement is correct?
(a) When S1 and S2 are closed, lamps A and B are lit.22
(b) With S1 open and S2 closed, A is lit and B is not lit.
(c) With S2 open and S1 closed A and B are lit.
(d) With S1 closed and S2 open, lamp A remains lit even if lamp B gets fused.
A wire of length 5 m has a resistance of 2.0 Ω calculate:
(a) the resistance of wire of length 1 m
(b) the equivalent resistance if two such wires each of length 2 m are joined in parallel.
(c) the resistance of 1 m length of wire of same material but of half diameter.
Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
What is the purpose of fuse in an electrical circuit?
A battery of e.m.f. 15 V and internal resistance 2 Ω is connected to two resistors of resistances 4 ohm and 6 ohm joined (a) in series. Find in each case the electrical energy spent per minute in 6 Ω resistor.
