Magnetic Effects of Current and Magnetism — practice questions
69 curated practice questions from Magnetic Effects of Current and Magnetism (Physics NEET, NTA Exams) — 42 easy, 14 medium, 13 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.
- A wire carrying a current I along the positive x-axis has length L. It is kept in a magnetic field B =(2 i 3 j -4 k ) T…
- A thin rectangular magnet suspended freely has a period of oscillation equal to T. Now it is broken into two equal…
- A galvanometer of 50 Ω resistance has 25 divisions. A current of 4 x 10 -4 A gives a deflection of one division. To…
- Maxwell’s equations describe the fundamental laws of ______.
- A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the center of the…
- Match the organism with its use in biotechnology [NCERT Pg. No. 164, 170, 173] [NEET 2020] (A) Bacillus thuringiensis…
- In a certain region of space electric field E and magnetic field E are perpendicular to each other and an electron…
- A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equilibrium state. The…
- An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B at the centre of the…
- The magnetic potential energy stored in a certain inductor is 25 mj, when the current in the inductor is 60 mA. This…
- The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration…
- Which of the following in motion can NOT be deflected by a magnetic field.
- An electron and a proton having equal K.E. are circulating in a uniform magnetic field. The relation between the radius…
- Among the following properties describing diamagnetism, identify the property that is wrongly stated:
- Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- Magnetic fields at two points on the axis of a circular coil at a distance of 0.05 m and 0.2 m from the centre are in…
- The magnetic field at the centre of a circular current carrying conductor of radius r is B c . The magnetic field on…
- A charge q moves in a region where electric field E and magnetic field E both exist, then the force on it is:
- Near a circular loop of conducting wire as shown in the figure an electron moves along a straight line. The direction…
- According to Curie's law, the magnetic susceptibility of a paramagnetic substance at an absolute temperature T is…
- The magnetic flux through a circuit of resistance R changes by an amount d Ф in a time dt. The quantity of electric…
- Relative permittivity and permeability of a material are _ r and μ r , respectively. Which of the following values of…
- A charged particle is moving in a magnetic field of strength B perpendicular to the direction of the field. If q and m…
- A charged particle enters in a strong magnetic field. Then its kinetic energy
- Given below are two statements Statement I : Bio-Savart's law gives us the expression for the magnetic field strength…
- A long horizontal metallic rod with length along the east - west direction is falling under gravity. The potential…
- A charged particle of charge q and mass m enters perpendicularly in a magnetic field E . Kinetic energy of the particle…
- If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is
- A 250-Turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 A and subjected to a magnetic…
- The relative permeability is represented by μ r and the susceptibility is denoted by χ for a magnetic substance. Then…
- A long straight wire of radius (a) carries a steady current ( I ). The current is uniformly distributed across its…
- Match column I and column II and choose the cor-rect combination from the given options : Column I Column II (A)…
- Current is flowing in a coil of area A and number of turns N, then magnetic moment of the coil m is equal to:
- A current i ampere flows along an infinitely long, straight, thin walled tube. Then the magnetic induction at any point…
- At a specific instant emission of radioactive compound is deflected in a magnetic field. The compound can emit Electron…
- A long solenoid of radius 1 mm has 100 turns per mm. If 1 A current flows in the solenoid, the magnetic field strength…
- An electron enters a region where magnetic field B, and electric field E are mutually perpendicular to each other…
- The ratio of de-Broglie's wavelength of an II -particle to that of a proton which are being subjected to the same…
- The time period of a charged particle undergoing a circular motion in a uniform magnetic field is independent of its
- The function of a selectable maker is [NCERT Pg. No. 169] [KCET 2015]
- The maximum current that can be measured by a galvanometer of resistance 40 Ω, is 10 mA. It is converted into a…
- A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the center of the…
- A proton and a deuteron with the same initial kinetic energy enter a magnetic field in a direction perpendicular to the…
- For a certain thermocouple, the temperature of the cold junction is 0 o C, the neutral and inversion temperature are…
- An organic compound which produces a bluish green coloured flame on heating in presence of copper is:
- In which type of material the magnetic susceptibility does not depend on temperature?
- A square loop of side 1 m and resistance 1 Ω is placed in magnetic field of 0.5 T. If the plane of loop is…
- Two bar magnets of the same length, breadth and mass and having the magnetic dipole moment 3M and 2M are allowed to…
- Two identical long conducting wires AOB and COD are placed at right angle to each other, with one above other such that…
- Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then…
- A charged particle moves through a magnetic field in a direction perpendicular to it. Then the:
- Hybridomas are employed for [NCERT; MP PMT 2003; Odisha JEE 2008]
- The dimensions of E B are same as that of :
- A wheel with 20 metallic spokes each 1 m long is rotated with a speed of 120 rpm in a plane perpendicular to a magnetic…
- Which of the following units denotes the dimensions ML ^ 2 Q ^ 2 ? where Q denotes the electric charges.
- A proton (mass m and charge e) and an alpha particle (mass 4m and charge +2e) are projected with the same kinetic…
- From Ampere's circuital law for a long straight wire of circular cross-section carrying a steady current, the variation…
- If the magnetic dipole moment of an atom of a diamagnetic material, paramagnetic material and ferromagnetic material…
- To send 10% of the main current through a moving coil galvanometer of resistance 99 ohm, the shunt required is:
- The electric generator produces electric current based on on the principle of
- A particle of mass m and charge q moving with velocity v describes a circular path of radius r when subjected to a…
- The magnetic fields due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm…
- A charged particle carrying charge 1 C is moving with velocity (2 i +3 j +4 k ) ms -1 . If an external magnetic field…
- The magnetic dipole moment of a current loop is independent of
- Given below are two statements: One is labelled as Assertion (A) and the other is labelled Reason (R). Assertion (A) …
- A light beam travelling in the x-direction is described by the electric field E_ y =(300 ~V / m ) (t-x / c) . An…
- Needles N 1 , N 2 and N 3 are made of a ferromagnetic, a paramagnetic and a diamagnetic substance, respectively. A…
- A charged particle moves through a magnetic field perpendicular to its direction. Then
- Cathode rays enter a magnetic field making oblique angle with the lines of magnetic induction. What will be the nature…