Physics Test 17...

A and C are concentric conducting spherical shells of radius a and c respectively. A  is surrounded by a concentric dielectric medium of inner radius a, outer radius b and dielectric constant K as shown in the figure. If sphere A is given a charge Q, the potential at the outer surface of the dielectric is.

In the given circuit the rms value of voltage across the capacitor C, inductor L and resister R₁ are 12V, 10V and 5V respectively. Then the peak voltage across R₂ is

Two identical capacitors C₁ and C₂ are connected in series with a battery. They are fully charged. Now a dielectric slab is inserted between the plates of C₂. The potential difference across C₁ will :

A solenoid having an iron core has its terminals connected across an ideal DC source. If the iron core is removed, the current flowing through the solenoid

An electric field ‘E’ whose direction is radially outward varies as distance from origin ‘r’ as shown in the graph. E is taken as positive if its direction is away from the origin. Then the work done by electric field on a 2 C charge if it is taken from (1, 1, 0) to (3, 0, 0) is

A negative test charge is moving near a long straight current carrying wire. A force will act on the test charge in a direction parallel to the direction of the current, if the motion of the charge is in a direction:

Potential difference between centre and the surface of sphere of radius R and having uniform volume charge density ρ within it will be :

The magnetic field at the origin due to the current flowing in the wire is

There exists a uniform electric field in the space as shown. Four points A, B, C and D are marked which are equidistant from the origin. If V_A, V_B, V_C and V_D are their potentials respectively, then

A current carrying wire AB of the length L is turned along a circle, as shown in figure. The magnetic field at the centre O.