## ­(beta) particle is emitted in radioactivity by ­ (beta) particle is emitted in radioactivity by

Anonymous User Chemistry Nuclear Chemistry 19 Apr, 2020 61 views

In an AC generator, a coil with N turns, all of the same area A and total resistance R, rotates with frequency w in a magnetic field B. What will be the maximum value of emf generated in the coil?

Anonymous User Physics Magnetostatics 19 Apr, 2020 56 views

In a series resonant LCR circuit, the voltage across R is 100 volts and R = with C = The resonant frequency is 200 rad/s. At resonance the voltage across L is

Anonymous User Physics Magnetostatics 19 Apr, 2020 58 views

The phase difference between the alternating current and emf is Which of the following cannot be the constituent of the circuit?

Anonymous User Physics Magnetostatics 19 Apr, 2020 56 views

One conducting U tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube moves towards the other at a constant speed v, then the emf induced in the circuit in terms of B, l and v where l is the width of each tube, will be Anonymous User Physics Magnetostatics 19 Apr, 2020 66 views

A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 radian per second. If the horizontal component of earth’s magnetic field is 0.2 × 10-4 T, then the e.m.f. developed between the two ends of the conductor

Anonymous User Physics Magnetostatics 19 Apr, 2020 63 views

In a uniform magnetic field of induction B a wire in the form of a semicircle of radius r rotates about the diameter of the circle with angular frequency . The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R the mean power generated per period of rotation is

Anonymous User Physics Magnetostatics 19 Apr, 2020 63 views

A coil having n turns and resistance R is connected with a galvanometer of resistance 4R . This combination is moved in time t seconds from a magnetic field W1 weber to W2 weber. The induced current in the circuit is

Anonymous User Physics Magnetostatics 19 Apr, 2020 60 views

In an oscillating LC circuit the maximum charge on the capacitor is Q. The charge on the capacitor when the energy is stored equally between the electric and magnetic field is

Anonymous User Physics Magnetostatics 18 Apr, 2020 57 views

elative permittivity and permeability of a material are and , respectively. Which of the following values of these quantities are allowed for a diamagnetic mateiral?

Anonymous User Physics Magnetostatics 18 Apr, 2020 59 views

The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is 2 s. The magnet is cut along its length into three equal parts and three parts are then placed on each other with their like poles together. What will be the time period of this combination?

Anonymous User Physics Magnetostatics 18 Apr, 2020 57 views

There are several types of enzyme catalysed reactions. In
one type of enzyme catalysed reaction, in addition to the
catalytic site to which the substrate (X) binds, the enzyme
also has a site to which some other substance (Y) can bind.
When Y binds to such an enzyme, the enzyme can still bind
to the substrate but cannot convert it to the product. Which
of the following will occur in such a case?

Anonymous User Biology 18 Apr, 2020 69 views

In an experiment, E. coli cells growing at 37°C were shifted to 20°C and grown for a few generations. Which of the
following changes in the membrane would help the E. coli cells adapt to the new environment?

Anonymous User Biology 18 Apr, 2020 94 views

A cladogram that classifies five species (M, N, O, P and Q) is shown below.Which of the six dots in the cladogram corresponds to the most recent common ancestor of N and P? Anonymous User Biology 18 Apr, 2020 65 views

During the growth of marine fish, initially, yolk sac and skin are the principal sites where transport protein ‘x’ is located. Later, skin and gills become principal sites and finally ‘x’ becomes localised to gills. The protein ‘x’ is

Anonymous User Biology 18 Apr, 2020 70 views

A horizontal overhead powerline is at a height of 4 m from the ground and carries a current of 100 A from east to west. The magnetic field directly below it on the ground is Anonymous User Physics Magnetic Effect of Current 17 Apr, 2020 58 views

Two identical conducting wires AOB and COD are placed at right angles to each other. The wire AOB carries an electric current I1 and COD carries a current I2. The magnetic field on a point lying at a distance d from O, in a direction perpendicular to the plane of the wires AOB and COD, will be given by

Anonymous User Physics Magnetic Effect of Current 17 Apr, 2020 76 views

A charged particle with charge q enters a region of constant, uniform and mutually orthogonal fields and with a velocity perpendicular to both and , and comes out without any change in magnitude or direction of . Then

Anonymous User Physics Magnetic Effect of Current 17 Apr, 2020 59 views

## What is the inductance between A and D? What is the inductance between A and D? Anonymous User Physics Electromagnetic Induction & Alternating Current 17 Apr, 2020 68 views

elative permittivity and permeability of a material are and , respectively. Which of the following values of these quantities are allowed for a diamagnetic mateiral?

Anonymous User Physics Magnetostatics 17 Apr, 2020 52 views

In a transformer, number of turns in the primary coil are 140 and that in the secondary coil are 280. If current in primary coil is 4 A, then that in the secondary coil is

Anonymous User Physics Electromagnetic Induction & Alternating Current 17 Apr, 2020 59 views

The power factor of an AC circuit having resistance (R) and inductance (L) connected in series and an angular velocity is

Anonymous User Physics Electromagnetic Induction & Alternating Current 17 Apr, 2020 58 views

A long solenoid has 200 turns per cm and carries a current i. The magnetic field at its centre is 6.28 × 10-2 Wb/m2. Another long solenoid has 100 turns per cm and it carries a current i/3. What will be the value of the magnetic field at its centre?

Anonymous User Physics Magnetic Effect of Current 16 Apr, 2020 138 views

In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. What will be the path of the particle?

Anonymous User Physics Magnetic Effect of Current 16 Apr, 2020 62 views

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

Anonymous User Physics Magnetic Effect of Current 16 Apr, 2020 56 views

A charged particle of mass m and charge q travels on a circular path of radius r that is perpendicular to a magnetic field B. What will be the time taken by the particle to complete one revolution?

Anonymous User Physics Magnetic Effect of Current 16 Apr, 2020 59 views

Two concentric coils each of radius equal to cm are placed at right angles to each other. 3 ampere and 4 ampere are the currents flowing in each coil respectively. The magnetic induction in weber/m2 at the center of the coils will be Anonymous User Physics Magnetic Effect of Current 16 Apr, 2020 55 views

A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10 divisions per milliampere and voltage sensitivity is 2 divisions per millivolt. In order that each division reads 1 volt, the resistance in ohms needed to be connected in series with the coil will be

Anonymous User Physics Magnetic Effect of Current 16 Apr, 2020 57 views

Two long conductors, separated by a distance d carry current I1 and I2 in the same direction. They exert a force F on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to 3d. What will be the new value of the force between them?

Anonymous User Physics Magnetic Effect of Current 16 Apr, 2020 63 views

The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is 54 What will be its value at the centre of the loop?

Anonymous User Physics Magnetic Effect of Current 16 Apr, 2020 54 views

A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is B. It is then bent into a circular loop of n turns. What will be the magnetic field at the centre of the coil?

Anonymous User Physics Magnetic Effect of Current 16 Apr, 2020 69 views