Abhishek Chandra Solutions for Chapter: Magnetic Effects of Electric Current, Exercise 1: EXERCISE

Which rule is used to determine the direction of force experienced by a current-carrying straight wire kept in a magnetic field which is perpendicular to it? (Choose out of Fleming's right-hand rule, Fleming's left-hand rule, Maxwell's right-hand thumb rule)

State the rule used to determine the direction of the magnetic field produced by a current-carrying circular loop of wire. (Choose out of Fleming's right-hand rule, Fleming's left-hand rule, Maxwell's right-hand thumb rule)

Which effect of current is utilised in detecting a current-carrying wire concealed in a wall?
(Choose from: heating effect / magnetic effect / chemical effect)

We know that when electric current passes through a wire, a magnetic field is produced. Why doesn't the wire of your study lamp attract pieces of iron when the lamp is switched on?

A student performs an experiment to study the magnetic effect of current around a current-carrying straight conductor. He reports that

(i) the direction of deflection of the North Pole of a compass needle kept at a given point near the conductor remains unaffected even when the terminals of the battery sending current in the wire are interchanged.

(ii) For a given battery, the degree of deflection of the North Pole of the compass decreases when it is kept at a point farther away from the conductor.

Which of the two observations is correct and why?

A current-carrying conductor is placed perpendicular to the magnetic field of a horseshoe magnet. The conductor is displaced upwards. State what will happen to the displacement of the conductor when

(a) the current in the conductor is increased.

A current-carrying conductor is placed perpendicular to the magnetic field of a horseshoe magnet. The conductor is displaced upwards. State what will happen to the displacement of the conductor when

(b) The horseshoe magnet is replaced by a stronger magnet.

A current-carrying conductor is placed perpendicular to the magnetic field of a horseshoe magnet. The conductor is displaced upwards. State what will happen to the displacement of the conductor when the length of the conductor is increased.