Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

Consider a book lying on a table. The weight of the book and the normal force by the table on the book are equal in magnitude and opposite in direction. Is this an example of Newton's third law?

Name the logic gate whose repetitive use can make digital circuits.

Draw three equipotential surfaces corresponding to the field whose magnitude increases uniformly, but remains constant along the z-direction. How are these surfaces different from those that lie along the z- direction of a constant electric field?

When a forward bias is applied to a p-n junction, it

1. Raises the potential barrier.
2. Reduces the majority carrier current to zero.
3. Lowers the potential barrier.
4. None of the above.

Consider the self-inductance per unit length of a solenoid at its centre and that near its ends. Which of the two is greater?

A point charge +Q is placed at point O as shown in the figure. Is the potential difference V_A – V_B positive, negative or zero?

The spring used in a moving coil galvanometer is of low torsion constant. Why?

Choose the correct alternative:
The resistivity of a typical insulator (e.g., amber) is greater than that of a metal by a factor of the order of (10²²/10³).

A resistor, inductor and a capacitor are joined with a de source. What is the magnitude of impedance of the circuit?

Answer the following questions, which help you understand the difference between Thomson’s model and Rutherford’s model better.
Is the average angle of deflection of α-particles by a thin gold foil predicted by Thomson’s model much less, about the same, or much greater than that predicted by Rutherford’s model?