1. a small test charge is released at rest at a point in an electrostatic field configuration. Will it travel along the line of force?
2. what happens if the plates of a charged capacitor are suddenly connected by acomducting wire?
3. a charged particle moves thrugh a region of uniform magnetic field. Is the momentum of the particle affected?
4. how does the self-inductance of a coil changed when an iron rod is introduced in it?
5. a carbon resistor is marked in colour bands of red black orange and silver. What is the resistance and the tolerance value of the resistor?
6. a galvanometer is shunted by 1/nth of its resistance. find the fraction of the total current passing through the galvanometer.
7. a charge “q” moving in a straight line is accelerated by a potential difference “V”. it enters a uniform magnetic field “B” perpendicular to its path. deduce in terma of “V” an expression for the radius of the circular path in which it travels.
8. what is the value of current in the CR circuit containing R=10 ohm, C=50 microfarad in serie across 200 V-50 Hz a.c source?
9. the current flowing through a conductor is 2mA at 50V and 3mA at 60V. is it an ohmic or non-ohmic conductor? explain mathematically.
10. a diverging lens of refractive index 1.5 and focal length 15 cm in air has the same radii of curvature for both sides. if it is immersed in a liquid of refractive index1.7. calculate the focal lengthof the lens in the liquid.

Monideepa Dasgupta , 9 Years ago

Grade 12