33. Choose the only false statement from the following

32. Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg)C (ES)Si and (Eg)Ge respectively. Which one of the following relationships is true in their case ?

31. Application of a forward bias to a p−n junction ?

30. Zener diode is used for ___ ?

27. The angular resolution of a 10 cm diameter telescope at a wavelength of 5000Å is of the order of ?

A network of four capacitors of capacity equal to C1 = C , C2 = 2C , C3 = 3C and C4 = 4C are connected to a battery as shown in the figure. The ratio of the charges on C2 and C4 is ?

As per the diagram, a point charge +q is placed at the origin O. Work done in taking another point charge −Q from the point A[ coordinates (0, a)] to another point B [coordinates (a, 0)] along the straight path AB is ?

Two charges q1 and q2 are placed 30 cm apart, as shown in the figure. A third charge q3 is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is q3/4πε0 k, where k is ?