33 Year NEET Previous Year Questions: Moving Charges & Magnetism - 1 - NEET MCQ

The total charge induced in a conducting loopwhen it is moved in a magnetic field depends on         [1990]

The magnetic induction at a point P which is at adistance of 4 cm from a long current carryingwire is 10^–3 T. The field of induction at a distance12 cm from the current will be [1990]

A deuteron of kinetic energy 50 keV is describinga circular orbit of radius 0.5 metre in a planeperpendicular to the magnetic field B. The kineticenergy of the proton that describes a circularorbit of radius 0.5 metre in the same plane withthe same B is        [1991]

A uniform magnetic field acts at right angles tothe direction of motion of electron. As a result,the electron moves in a circular path of radius2cm. If the speed of electron is doubled, thenthe radius of the circular path will be [1991]

The magnetic field at a distance r from a longwire carrying current i is 0.4 tesla. The magneticfield at a distance 2r is                [1992]

A straight wire of length 0.5 m that is carrying a current of 1.2 A is placed in a uniform magnetic field of induction 2T, and the magnetic field is perpendicular to the length of the wire. What is the force of the wire?

To convert a galvanometer into an ammeter, oneneeds to connect a        [1992]

A coil carrying electric current is placed inuniform magnetic field, then         [1993]

A charge moving with velocity v in X-directionis subjected to a field of magnetic induction innegative X-direction. As a result, the charge will              [1993]

An electron enters a region where magnetic field(B) and electric field (E) are mutually perpendicular,then        [1994]

A straight wire of diameter 0.5 mm carrying acurrent of 1 A is replaced by another wire of 1mm diameter carrying same current. The strengthof magnetic field far away is          [1995, 97, 99]

At what distance from a long straight wirecarrying a current of 12 A will the magnetic fieldbe equal to 3×10^-6Wb /m² ?        [1995]

The magnetic field  due to a small element (dℓ ) at a distance  and element carrying current i is           [1996]

A 10 eV electron is circulating in a plane at rightangles to a uniform field at magnetic induction10^{– 4} Wb/m² (= 1.0 gauss). The orbital radius ofthe electron is [1996]

Two equal electric currents are flowing perpendicular to each other as shown in the figure. AB and CD are perpendicular to each other and symmetrically placed with respect to the current flow. Where do we expect the resultant magnetic field to be zero? [1996]

A beam of electrons is moving with constantvelocity in a region having simultaneousperpendicular electric and magnetic fields ofstrength 20 Vm^–1 and 0.5 T respectively at rightangles to the direction of motion of the electrons.Then the velocity of electrons must be         [1996]

A galvanometer of resistance 20 Ω gives fullscale deflection with a current of 0.004 A. Toconvert it into an ammeter of range 1 A, therequired shunt resistance should be          [1996]

A positively charged particle moving due eastenters a region of uniform magnetic field directedvertically upwards. The particle will      [1997]

Two long parallel wires are at a distance of 1metre. Both of them carry one ampere of current.The force of attraction per unit length betweenthe two wires is [1998]

A galvanometer having a resistance of 8 ohmsis shunted by a wire of resistance 2 ohms. If thetotal current is 1 amp, the part of it passingthrough the shunt will be          [1998]

A coil of one turn is made of a wire of certainlength and then from the same length a coil oftwo turns is made. If the same current is passedin both the cases, then the ratio of the magneticinductions at their centres will be [1998]

Magnetic field intensity at the centre of a coil of50 turns, radius 0.5 m and carrying a current of 2A is       [1999]