JEE Revision Plan - Physics 9.2 for JEE & BITSAT Exams

Question 1

In given amplifier, collector resistance is 6kΩ. Voltage and current gain are 25 and 100 respectively. Rin is 2.4kΩ. Find the load resistance.

Question 2

In this amplifier, find the Vcc such that VCE= +5,7V. Given that V_BE= 0.7V.

Question 3

Find R_b such that the transistor can be used as a switch which is open. V_BE = 0.7V

Question 4

What is true about LC oscillator Circuit?

Question 5

Initial LC oscillator frequency is 150Hz and inductance L=3H. If frequency is changed to 180Hz without changing the inductance, find the percentage change in capacitance of the circuit.

Question 6

What is true about gain of the LC oscillator at the start?

Question 7

When the angular frequency of a carrier wave is thrice of the modulating angular frequency, then what are the frequencies of amplitude modulated signal

Question 8

When the area covered by a T.V. telecast is increased by four time, then the height of a transmitting antenna will be

Question 9

For amplitude modulated transmission a band width of 20 MHz is used. If the audio signal modulating is less than 20 kHz, then the number of stations that can be broadcasted within this band is

Question 10

Which of the following is the frequency of side bands when an audio signal of 2000 Hz modulates a carrier generated by a tank circuit comprising of a capacitor of 10^-10 F and a coil of 10^-5 H

Question 11

What is the frequency range of FM wave when an audio signal of 2.2 kHz modulates a carrier wave of frequency 100 MHz?

Question 12

The height of the T.V. tower is 100 m, if it covers a total population of 60 lakhs. Than What is the average population density around the T.V. tower?

Question 13

The heights of a transmitting antenna and a receiving antenna are 40 m and 60 m, respectively. The maximum distance between them for satisfactory communication in line of sight mode is

Question 14

Range of frequencies allotted for commercial FM radio broadcast is

Question 15

In a radio and television broadcast, the information signal is in the form of