In series combination of capacitors, the net capacitance of combination:

When a number of capacitors are connected in series between two points, all the capacitors possesses same

A coil of one loop is made by a wire of length L and there after a coil of two loops is made by same wire. The ratio of magnetic field at the centre of coils respectively:-

If we double the radius of a coil keeping the current through it unchanged, then the magnetic field at any point at a large distance from the centre becomes approximately

Biot-Savart law indicates that the moving electrons with velocity (v)produce a magnetic field B such that

A current I flows along the length of an infinitely long, straight, thin walledpipe, then

When a magnetic field is applied on a stationary electron, it

A moving coil galvanometer is an instrument which

The deflection in a moving coil galvanometer is

Magnetic moment (or magnetic dipole moment) of a current carrying coil is given by

The SI unit of magnetic dipole moment is

In a coil of self-induction 5 H, the rate of change of current is 2 As^-1.Then emf induced in the coil is

Faraday’s laws are consequence of the conservation of

Lenz’s law is a consequence of the law of conservation of

If the number of turns per unit length of a coil of a solenoid is doubled, itself inductance will be

A rectangular coil 20 cm × 20cm, has 100 turns and carries a current of 1A.It is placed in a uniform magnetic field 0.5T with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is:-

A long solenoid with 20 turns per cm is made to produce a magnetic field of 20 mT inside the solenoid. The necessary current will nearly be:-

Two long parallel wires are at a distance of 1m. If both of them carry 1A of current in same direction. The magnetic force of attraction on unit length of each wire will be:-

A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is:-

A charged particle is moving with velocity v under the magnetic field B. The force acting on the particle will be maximum if:-

A charged particle experiences magnetic force in the presence of magnetic field. Which of the following statement is correct?

A charge q moves with a velocity 2 m/s along x-axis in a uniform magnetic field 𝐵⃗= (𝑖̂ + 2𝑗̂+ 3𝑘̂), then charge will experience a force

A beam of positively charged particles moving along +x axis, experience a force in +y direction due to a magnetic field. The direction of magnetic field is

Unit of magnetic flux density is

A charged particle is moving with velocity v under the magnetic field B. The force acting on the particle will be maximum if:-

The radius of circular loop is r and a current i is flowing in it. The equivalent magnetic moment will be

A magnetic field of 5.0 × 10–4 T just perpendicular to the electric field of 15 kV/m in their effect an electron beam passes undeflected and perpendicular to both of them. The speed of the electrons is:-

A charged particle moves through a magnetic field perpendicular to its direction. Then

If resistance of a galvanometer is 6 Ω and it can measure a maximum current of 2 A. Then required shunt resistance to convert it into an ammeter reading up to 6 A, will be

A galvanometer can be changed into voltmeter by providing

If the number of turns in a moving coil galvanometer is increased, its current sensitivity

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity, then

If a current is passed in a spring, it

A galvanometer acting as ammeter will have

Biot-Savart law indicates that the moving electrons with velocity (v)produce a magnetic field B such that

If we double the radius of a coil keeping the current through it unchanged, then the magnetic field at any point at a large distance from the centre becomes approximately

A magnetic field

A current of 10 A is flowing in a wire of length 1.5 m. A force of 15 Nacts on it when it is placed in a uniform magnetic field of 2 T. The angle between the magnetic field and the direction of the current is 

Wire in the form of a right angle ABC, with AB=3cm and BC = 4cm, carries a current of 10A. There is a uniform magnetic field of 5T perpendicular to the plane of the wire. The force on the wire will be:-

A rectangular coil 20 cm × 20cm, has 100 turns and carries a current of 1A. It is placed in a uniform magnetic field 0.5T with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is:-