| Ques 1. Define 'power' of a convex lense. What is its units? |
The power of convex lense is its ability to converge light rays, quantified as the reciprocal of its focal length (in meters), and measured in diopters (D). |
| Ques 2. What is the principle as a moving coil galvanometer? |
A moving coil galvannometer works on the principle that a current-carrying coil experiences a trrque when placed in a magnetic field. The coil deflect, and the amount of deflection is proportion to the amount of current passing through the coil. |
| Ques 3. Magnetic lines form continuous closed loops. Why? |
Magnetic lines form continuous closed loops because magnetic poles always comes in pairs. It is also called magnetic variation. |
| Ques 4. Define magnetic declination. |
Magnetic declination is the angle between the magnetic north and true north. Its also called magnetic variation. |
| Ques 5. A transformer converts 200 V ac into 2000 V ac. Calculate the number of terms int he secondary if the primary has 10 turns. |
Vs/Vp=Ns/NpVp = 200 V Vs = 2000V Np = 10 |
| Ques 6. What are the application of microwaves |
Microwaves have diverse applications ranging from cooking and communication to medical diagnostics and radar systems, leveraging their unique properties for various tasks. |
| Ques 7. Write down Einsteins's photoelectric equation. |
Einstein represented the equation with the formula EK=hf=ω |
| Ques 8. What important fact did Milikan's experiment establish |
Robert Milikan's oil experiment established that the change of an electron is quantized and has a fixed value. |
| Ques 9. What hapens to the width of depletion layer in p-n junction when it is (i) forward biased and (ii) reverse biased |
In a p-n junction diode, the width of the depletion layer decreases when forward biased and increases when reverse biased. |
| Ques 10. What are the basic blocks of a communication system? |
The fundamental blocks of a communication syastem are a source (a transmitter), a channel, and a receiver |
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