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Two galvanometers A and B require `3 mA and 5 mA` respectively to produce the same deflection of `I_0` division.

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A galvanometer acting as a voltmeter should

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A galvanometer has a resistance of `100 Omega`. A potential difference of `100 mV` between its terminals gives a full scale deflection. The shunt resistance required to convert it into an ammeter reading upto `5A`

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Magnetic field in a region is produced only by

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A charged particle enters a magnetic field B with its initial velocity making an angle of 45° with B. The path of the particle will be

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A small circular flexible loop of wire of radius `r` carries a current `I`. It is placed in a uniform magnetic field B. The tension in the loop will be doubled, if .......... is

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Equal current is being passed through two very long and straight parallel wires in the same direction. They will .......... each

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Which of the following statement is correct regarding the Coulomb’s force and Biot-Savart’s

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Which of the following statement(s) is/are

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Four particles `alpha`-particle, deuteron, electron and a `Cl^-` ion enter in a transverse magnetic field perpendicular to it with same kinetic energy. Their paths are as shown in figure. Now, match the following two columns. Column I Column II A. Deuteron p. Path-1 B. `alpha`-particle q. Path-2 C. Electron r. Path-3 D. `Cl^-` s. Path-4

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

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A charged particle with some initial velocity is projected in a region where non-zero electric and/or magnetic field(s) are present.In Column I, information about the existence of electric and/or magnetic field(s) and direction of initial velocity of charged particle are given, while in Column II the probable path of the charged particle is mentioned. Match the entries of Column I with the entries of Column II and select the correct answer from the codes given below. Column I Column II A. `E=0, B!=0, E!= B` and initial velocity is at any angle with `B (theta!=90°)`

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

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A square current carrying loop abed is placed near an infinitely long another current carrying wire ef. Now, match the following two columns. Column I Column II A. Net force on `bc and da` p. zero B. Net force on `ab and cd` q. non-zero C. Net force on complete loop `abcd` r. rightwards D. Net force on ab s. constant

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

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Assertion: Two infinitely long wires A and B carry unequal currents in inward direction.Then, there is only one point (excluding the points at infinity), where net magnetic field is zero.Reason: That point lies between points A and

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

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Assertion: The magnetic field produced by a current carrying solenoid is independent of its length and cross-sectional area. Reason: The magnetic field inside the solenoid is

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Assertion: A magnetic field interacts with a moving charge and not with a stationary charge. Reason: A moving charge produce a magnetic

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Assertion: Electron moving perpendicular to B will perform circular motion. Reason: Force by magnetic field is perpendicular to

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Assertion: A charge particle is released from rest in magnetic field, then it will move in a circular path. Reason: Work done by magnetic field is

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Assertion: If a moving charged particle enters into a region of magnetic field from outside, it does not complete a circular path. Reason: Power associated with the force exerted by a magnetic field on a moving charged particle is always equal to

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

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Assertion: If a charged particle is projected in a region, where B is perpendicular to velocity of projection, then the net force acting on the particle is independent of its mass. Reason: The particle is performing uniform circular motion and force acting on it is

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Assertion: When a charged particle moves in a region of magnetic field such that its velocity is at some acute angle with the direction of field, its trajectory is a helix. Reason: Perpendicular component of velocity causes a rotating centripetal force and parallel component of velocity does not produces any

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

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