Six point charges are kept 60° apart from each other on the circumference of a circle of radius R as

A simple pendulum has a bob with mass m and charge q .The pendulum string has negligible mass. When

Electric field in a region is given by E = A x i + B y j where A = 10 V /m 2 and B = 5 V /m 2 . If

Three small identical bubbles of water having same charge on each coalesce to form a bigger bubble

In the diagram given below there are three lenses formed.Considering negligible thickness of each of

Five positive charges each having charge q are placed at the vertices of a pentagon as shown in the

Two charges 7μC and −2μC are placed at (−9,0,0)cm and (9,0,0) cm respectively in an external field E

Two shorts dipoles (A, B) A having charges ± 2 μ C and length 1 cm and B having charges ± 4 μ C and

A block of mass 2 kg is attached to one end of a massless spring whose other end is fixed at a wall

There are three co-centric conducting spherical shells A, B and C of radii a, b and c respectively

Two known resistance of R Ω and 2R Ω and and one unknown resistance X Ω are connected in a circuit

A meter bridge with two resistances R1 and R2 as shown in figure was balanced (null point) at 40 cm

An electric power line having total resistance of 2Ω delivers 1 kW of power at 250 V. The percentage

A wire of uniform resistance λΩ/m is bent into a circle of radius r and another piece of wire with

Two resistors 2Ω and 3Ω are connected in the gaps of bridge as shown in figure.The null point is

A regular hexagon is formed by six wires each of resistance r Ω and the corners are joined to the

Two resistors of 100 Ω each are connected in series with a 9 V battery. A voltmeter of 400 Ω resist

A moving coil galvanometer of resistance 100 Ω shows a full scale deflection for a current of 1mA

For the two cells having same EMF E and internal resistance r the current passing through the

Which one of the following is not a measurable quantity

A Wheatstone bridge is initially at room temperature and all arms of the bridge have same value of

The reading of the ammeter (A) in steady state in the following circuit assuming negligible internal

The electrostatic potential in a charged spherical region of radius r varies as v = ar^3 + b where

Conversion of propene to propyne

Identify A,B,C,D,E,R and R 1 in the following

Two point charges of 1nC and 2nC are placed at two corners of an equilateral triangle of side 3 cm.

why Aniline does not undergo Friedel-Crafts alkylation or acylation

Which one of the following compounds does not decolourize bromine water

Bromination of aniline

In a Young's double-slit experiment the intensity ratio of maxima and minima is infinite. The ratio

If one of two identical slits producing interference in Young's experiment is covered with glass so

A voltage signal is described by

A photon emitted during the de-excitation of electron from a state n to the first excited state in a

Find the equivalent capacitance between points A and B if capacitance of each capacitor is C

An alternating voltage E = E0 sin ωt is applied to a circuit containing a resistor R connected in

the rms value of a current is given by i=( i1coswt+i2sinwt)

Identify the correct statements electrostatic field lines form closed loops

A symmetric biconvex lens of radius of curvature R and made of glass of refractive index 1.5 is

Use Kirchhoff's rule to determine the currents flowing through the branches MN, TO and SP in the

In interference of light write the expression for the intensity of the resultant wave if I0​ is the

Consider I₁ and I₂ are the currents flowing simultaneously in two nearby coils 1 & 2 respectively

A coil of area A and N turns is rotating with angular velocity ω in a uniform magnetic field B about

Metal complexes show different colours due to d-d transitions.The complex absorbs light of specific

XPQY is a vertical smooth long loop having a total resistance R where PX is parallel to QY and

Figure shows the circuit that contains three resistances(9Ω each) and two inductors ( 4 mH each).

When sucrose is hydrolysed the optical rotation values are measured using a polarimeter and are give

The unit vector perpendicular to the vectors i - j and i + j is

A small town is anlyzing the pattern of a new street light installation.The lights are set up in

A 20 m long uniform copper wire held horizontally is allowed to fall under the gravity(g = 10m/s^2)

Suppose a long solenoid of 100 cm length radius 2 cm having 500 turns per unit length carries a

A circular loop of radius 7 cm is placed in uniform magnetic field of 0.2 T directed perpendicular

A biconvex lens is formed by using two thin planoconvex lenses as shown in the figure.The refractive

Two convex lenses A and B each of focal length 10.0 cm are mounted on an optical bench at 50.0 cm

Two small identical electric dipole AB and CD each dipole moment p are kept at an angle of 120° to

A small object with charge q and weight mg is attached to one end of a string of length L. The other

Statement I: When currents vary with time, Newton's third law is valid only if momentum carried by

Radioactive decay follows first order kinetics. The initial amount of two radioactive elements X and

An electron projected perpendicular to a uniform magnetic field B moves in a circle. If Bohr's

Let B1 be the magnitude of magnetic field at center of a circular coil of radius R carrying current

If oxygen ion (O²⁻) and Hydrogen ion (H⁺) enter normal to the magnetic field with equal momentum