Magnetic Effects of Electric Current

While magnetic field lines emerge from the North pole and merge at the South pole outside a magnet, what is the direction of these field lines inside the bar magnet?

Magnetic field lines are drawn such that they enter the magnet at which pole?

If a bar magnet is broken into two pieces, each piece will have:

A straight conductor carries current from South to North. What is the direction of the magnetic field at a point directly below it?

The magnetic field produced by a straight wire at a point is $B$. If the current is tripled, the field becomes:

Two magnetic field lines never intersect because at the point of intersection:

Which of the following would NOT increase the magnetic field of a solenoid?

The total magnetic field of a solenoid is the ________ of the magnetic fields of all the individual turns.

In a solenoid, the magnetic field is produced due to the ______ effect of electric current.

In the motor effect, the electrical energy is converted into:

What is the direction of the force on a proton moving towards the top of the page in a magnetic field directed into the page?

To find the direction of force on a current-carrying conductor, we use the left hand and keep the fingers:

In the context of the Left-Hand Rule, the 'Forefinger' is sometimes called the:

If you hold your left hand with the thumb, forefinger, and middle finger at $90^\circ$ to each other, the Thumb indicates:

A horizontal wire carries current from West to East. If it is placed in a magnetic field acting vertically upwards, the force on it will be towards:

The magnetic field at the center of a circular current-carrying coil is ____ to the plane of the coil.

What property of a magnetic field is indicated by the closeness of the field lines?

Which of the following is a source of direct current?

In an AC generator, the two ends of the coil are connected to _____ slip rings.

Which of the following is NOT a component of a basic AC generator?

The time taken by an alternating current to complete one full cycle is called its:

A current reverses its direction every $0.02\text{ seconds}$. What is the frequency of this AC?

If the frequency of an AC generator is $10\text{ Hz}$, how many full cycles are completed in $1$ minute?

The standard frequency of AC in India is $50\text{ Hz}$. What is the ratio of this frequency to the frequency of DC?

What is the role of the distributing box in a domestic circuit?

Which terminal of a $3$-pin socket is connected to the wire that goes deep into the earth?

What happens when a fuse in the domestic circuit 'blows'?