Electric Charges and Fields — Physics STD 12 Science — Question

When air in a capacitor is replaced by a medium of dielectric constant K, the capacity:

Nuclear forces are:

Which of the following particles will experience maximum magnetic force circle when projected with the same velocity perpendicular to a magnetic field?

Chadwick was awarded the Nobel Prize in Physics in 1935 for his discovery of:

Choose the correct statement:

A solid conducting sphere having a charge Q is surrounded by an uncharged concentric conducting hollow spherical shell. Let the potential difference between the surface of the solid sphere and that of the outer surface of the hollow shell be V.  If the shell is now given a charge of –3Q, the new potential difference between the same two surfaces is(a) V (b) 2V(c) 4V(d) – 2V

If in nature there may not be an element for which the principal quantum number n > 4, then the total possible number of elements will be(a) 60(b) 32(c) 4(d) 64

Capacitance of a parallel plate capacitor becomes 4/3 times its original value if a dielectric slab of thickness t = d/2 is inserted between the plates (d is the separation between the plates). The dielectric constant of the slab is(a) 8 (b) 4(c) 6  (d) 2