Question Bank [ 2022 ] Physics - Question Bank [ 2022 ]

The decay constant λ of a certain radioactive material is 0.2166 per day. The average life τ of the radioactive material is ______ 

In a single slit diffraction pattern, the first minima obtained with the red light of wavelength 6600 A.U. coincides with the first maxima f some other wavelength λ then is ______ 

For which logic gate the following statement is true The output is low, if and only if all inputs are low ______ >

Four resistances 4 Ω, 8Ω, XΩ and 12Ω are connected in a series to form Wheatstone’s network. If the network is balanced, the value of X is ______.

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?

State law of linear density.

What is the internal energy of the system, when the amount of heat Q is added to the system and the system does not do any work during the process?

State any one use of a potentiometer.

The optical path of a ray of light of a given wavelength travelling a distance of 3 cm in flint glass having refractive index 1.6 is the same as that on travelling a distance x cm through a medium having a refractive index 1.25. Determine the value of x.

Differentiate between the reversible and irreversible processes.

The half-life of a certain radioactive nucleus is 3.2 days. Calculate (i) decay constant (ii) average life of radioactive nucleus.

What is the capacitive reactance of a capacitor of 5µF at a frequency of (1) 50 Hz and (2) 20KHZ?

A cylinder containing one gram molecule of the gas was compressed adiabatically until its temperature rose from 27°C to 97°C. Calculate the work done and heat produced in the gas (? = 1.5).

Calculate the fall in temperature of helium initially at 15°C when it is suddenly expanded to 8 times its original volume (? = 5/3).

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.

Explain thermodynamics of the adiabatic process.

Explain the thermodynamics of the isochoric process.

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