Current Carrying Conductor

Q. Why does a magnetic needle gets deflected when it is brought close to current carrying conductor ?

Q.

Why increasing tje number of turns of the coil increases the magnetic field of an electromagnet?

Q. When a magnetic compass is brought near a current carrying wire then what happens?

Q.

When a current flows through a conductor, the conductor behaves like a magnet.

1. True

2. False

Q.

When we change the direction of current in a conductor, the magnetic field line around it

1. decreases

2. changes its direction

3. remain same

4. increases

Q. Define one ampere.

Q.

Can a magnetic field exist without an electric field?

Q.

What is the difference between B and H?

Q. The flow of charges is known as electric current.

1. True
2. False

Q. Why only does a coiled wire and not a straight wire in an electical circuit behave like a magnet?

Q.

When no current flows through a conductor, a magnetic field is produced across it

1. True

2. False

Q.

The needle of a compass does not deflect when it is brought near a current carrying conductor.

1. True

2. False

Q. When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain. [2 MARKS]

Q.

(a) For the arrangement shown below, what should be done to change the direction in which the magnetic needle gets deflected?

(b) What is the pattern of magnetic field around a current carrying conductor? [2 MARKS]

Q. Magnetic flux linked with an inductor increases from 0 and x, as the current in the inductor increases from 0 to y.Magnetic every stored in the inductor is

Q.

how to determine the direction of vectors in electromagnetic waves when direction of propagation is given ??

Q.

When current in current-carrying conducor is increased

1. magnetic field around it decreases.

2. magnetic field around it increases.

3. magnetic field around it remains same.

4. magnetic field around it first increases then decreases.

Q.

does too much magnetisim affect the amount of current given by an object

Q.

A plane electromagnetic wave travels , in vacuum , along the y direction. Write the ratio of the magnitudes and the direction of its electric and magnetic filed vectors.

Q.

A current carrying conductor generates a ___ around it.

1. gravitational field

2. magnetic field

3. low-pressure region

4. high-pressure region

Q. The shape of magnetic field lines around a straight current carrying wire is ___.

1. elliptical curves
2. concentric circles
3. a grid of parallel and perpendicular lines
4. parallel lines

Q. A thin semicircular conducting ring of radius r with its plane vertical and perpendicular to magnetic meridian is falling in earths magnetic field. At an instantaneous position, the speed of the ring is v. The potential difference developed across the ring is? And which side is at higher at higher potential?(Assume Bh and Bv to be the horizontal and vertical components of the earths magnetic field)

Q. in free space at a point magnitude of electric field vector is 9.3 V/m. find magnitude of magnetic field vector at a point.

Q. What is the shape of the magnetic field lines at the centre of a current carrying circular ring?

1. Circular
2. Straight line
3. Ellipse
4. Magnetic field is zero at the center

Q.

Why does the needle of a magnetic compass deflect when it is kept beside a current carrying wire?

1. Due to the magnetic effect of current

2. Due to the heating effect of electric current

3. Due to the chemical effect of electric current

4. All of the above

Q.

two straight long conductors AOB and COD are perpendicular to each other and carry currents I1 and I2 respectively. find the magnitude of the magnetic field at a point P at a distance a from the point O in a direction perpendicular to the plane ABCD.