Advertisements
Advertisements
प्रश्न
Fill in the folloing blank with suitable words:
A current is a flow of ............... .For this to happen there must be a ............... circuit.
उत्तर
A current is a flow of electrons. For this to happen, there must be a closed circuit.
APPEARS IN
संबंधित प्रश्न
Which statement/statement is/are correct?
1. An ammeter is connected in series in a circuit and a voltmeter is connected in parallel.
2. An ammeter has a high resistance.
3. A voltmeter has a low resistance.
(a) 1, 2, 3
(b) 1, 2
(c) 2, 3
(d) 1
The following circuit diagram shows three resistors 2 Ω, 4 Ω and R Ω connected to a battery of e.m.f 2V and internal resistance 3 Ω. If the main current of 0.25 A flows through the circuit, find:
- the p.d. across the 4 Ω resistors,
- the p.d. across the internal resistance of the cell,
- the p.d. across the R Ω or 2 Ω resistors, and
- the value of R.
An electric current flowing in a wire creates __________ around the wire.
Tick(✓) the correct choice in the following:
When the length of a conductor is doubled the resistance of the conductor
will
Choose the correct option from given alternative:
At the time of short circuit, the electric current in the circuit :
One unit of electrical energy consumed is equal to 1000 kilowatt-hour.
- What is meant by electric current?
- Name and define its unit.
- Which instrument is used to measure the electric current? How should it be connected in a circuit?
The number of electrons constituting a 1-coulomb charge is ______.
