Advertisements
Advertisements
प्रश्न
When an electric current flows through a copper wire AB as shown in the following figure, the wire

विकल्प
deflects a magnetic needle placed near it.
becomes red hot.
gives electric shock.
behaves like a fuse.
Advertisements
उत्तर
deflects a magnetic needle placed near it.
Explanation:
A current carrying wire acts as a magnet with a magnetic field around it, the strength of which depends upon the amount of current passing through it.
APPEARS IN
संबंधित प्रश्न
Draw circuit symbols for
a cell
Explain with the help of a labelled circuit diagram how you will find the resistance of a combination of three resistors, or resistance R1, R2 and R3, joined in parallel. Also mention how you will connect the ammeter and the voltmeter in the circuit when measuring the current in the circuit and the potential difference across one of the three resistors of the combination.
Who will spend more electrical energy? 500 W TV Set in 30 mins, or 600 W heater in 20 mins?
Draw a neat diagram showing a open electric circuit.
Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 2 Ω in series with a combination of two resistors (4 Ω each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the 2 Ω resistor be the same as that across the parallel combination of 4 Ω resistors? Give reason.
In an electric circuit, the current starts from ______.
Name the device used these days in place of electric fuses in electrical circuits.
In an electric circuit a fuse is a ______ ______ to prevent possible fire.

In the above circuit, if the current reading in the ammeter A is 2A, what would be the value of R1?
