HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Physics

A voltmeter has a resistance of 100 Ω. What will be its reading when it is connected across a cell of emf 6 V and internal resistance 20 Ω? 

What are the disadvantages of a potentiometer over a voltmeter?

A cell of e.m.f 1.5V and negligible internal resistance is connected in series with a potential meter of length 10 m and the total resistance of 20 Ω. What resistance should be introduced in the resistance box such that the potential drop across the potentiometer is one microvolt per cm of the wire?  

The emf of a standard cell is 1.5V and is balanced by a length of 300 cm of a potentiometer with a 10 m long wire. Find the percentage error in a voltmeter that balances at 350 cm when its reading is 1.8 V.  

A pair of the adjacent coil has a mutual inductance of 1.5 H. If the current in one coil varies from 0 to 20 A in 0.5 s, what is the change of flux linked with the other coil. 

Define Mutual Inductance.

In a common base configuration, the transistor has an emitter current of 10 mA and a collector current of 9.8 mA. The value of base current is ______ 

For a transistor β =75 and I_E = 7.5 mA. The value of α is ______ 

In a transistor amplifier, I_C = 5.5 mA , I_E = 5.6 mA. The current amplification factor β is ______ 

Draw the circuit symbol of the PNP transistor. 

For a transistor I_C = 15 mA, I_B = 0.5 mA. What is the current amplification factor?  

Explain the working of the PNP transistor? 

Draw the circuit symbol for NPN and PNP transistors. What is the difference in the Emitter, Base, and Collector regions of a transistor? 

With the help of a neat diagram, explain the working of the npn transistor?  

With the help of a neat circuit diagram, explain the transistor as an amplifier? 

Draw the circuit diagram to study the characteristic of the transistor in common emitter mode. Draw the input and output characteristics. 

What is rectification?

The root mean square speed of the molecules of a gas is proportional to ______.
[T =Absolute temperature of gas]

Calculate the moment of inertia of a uniform disc of mass 10 kg and radius 60 cm about an axis perpendicular to its length and passing through its center.

Determine the shortest wavelengths of Balmer and Pasch en series. Given the limit for the Lyman series is 912 Å.