Recent questions tagged #mcq

0 votes

0 answers

The strength of the magnetic field at a point y near a long straight current carrying wire is B. The field at a distance y/2 will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The mag. field (B) at the centre of a circular coil of radius 'a', through which a current I flows

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A current of a 1 Amp is passed through a straight wire of length 2 meter. The magnetic field at a point in air at a distance of 3 meters from either end of wire and lying on the axis of wire will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

If the strangth of the magnetic field produced at 10 cm away from a infinilely long straight conductor is `10^(-5)` tesla. The value of the current flowing in the conductor will be...............

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A long straight wire of radius 'a' carries a steady current I the current is uniformly distributed across its cross-section. The ratio of the magnetic field at a/2 and 2a is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

At a distance of 10 cm from a long straight wire carrying current, the magnetic field is `4xx10^(-2)` . At the distance of 40 cm, the magnetic field will be

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

As shown in figure ABCD and CDEF planes are kept carrying current I. Each side of the plane is having length '2a'. The magnetic field due to ABCD and CDEF planes at the point P(a, 0, a) is in the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A He nucleus makes a full rotation in a circle of radius 0.8 meter in 2 sec. The value of the mag. field B at the centre of the circle will be ...................

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The magnetic field at pt. 'O' in the figure shown is ..................... Where AB = CD = 2 cm R1 = 10 cm R2 = 12 cm I = 4

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

As shown in Fig. there are two semicircles of radii `r_1 = 12 cm` and `r_2 = 10 cm` in which 4 Amp current is flowing The mag. field at the centre 'O' is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The direction of mag. field lines close to a straight conductor carrying current will be

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Due to 10 Amp of current flowing in a circular coil of 10 cm radius, the mag. field produced at its centre is `pixx10^(-3)` Tesla. The number of turns in the coil will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

There are 50 turns / cm in a long solenoid. If 4 Amp current is flowing in the solenoid, the approximate value of mag. field along its axis at an internal point and one end will be

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The distance at which the magnetic field on axis as compared to the mag. field at the centre of the coil carrying current I and radius R is , `1/8` would

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In a H-atom, an electron moves in a circular orbit of radius `5.2xx 10^(-11)` meter and produces a mag. field of 12.56 Tesla at its nucleus. The current produced by the motion of the electron will be .................

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A conducting rod of 1 meter length and 1 kg mass is suspended by two vertical wires through its ends. An external magnetic field of 2 Tesla is applied normal to the rod. Now the current to be passed through the rod so as to make the tension in the wires zero is [take g = 10

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A straight wire of mass 200 gm and length 1.5 meter carries a current of 2 Amp. It is suspended in mid-air by a uniform horizontal magnetic field B. [take g = 10 m/`s^2` ]. The B is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A long solenoid has 200 turns per cm and carries a current of 2.5 Amp. The mag. field at its centre is ......................

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Two concentric co-planar circular Loops of radii `r_1` and `r_2` carry currents of respectively I1 and I2 in opposite directions. The magnetic induction at the centre of the Loops is half that due to I1 alone at the centre. If `r_2 = 2r_1` the value of `I_2/ I_1`

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Circular loop of a wire and a long straight `I_C` , `I_E` respectively as shown in fig. Assuming that these are placed in the same plane. The mag. field will be zero at the centre of the Loop when separation H is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

Recent questions tagged #mcq

Categories