HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Physics

An alternating emf of 230V, 50Hz is connected across a pure ohmic resistance of 50Ω. Find (1) the current (2) equations for instantaneous values of current and voltage.

State any two special-purpose diodes.

State any two advantages and disadvantages of a photodiode. 

Define the dark current of the photodiode. What are the advantages and disadvantages of a photodiode?  

When the bob performs a vertical circular motion and the string rotates in a vertical plane, the difference in the tension in the string at horizontal position and uppermost position is ______.

A liquid rises in glass capillary tube upto a height of 2.5 cm at room temperature. If another glass capillary tube having radius half that of the earlier tube is immersed in the same Liquid, the rise of liquid in it will be _______.

Define magnetization.

Define magnetization.

What is magnetic susceptibility?

What is magnetic susceptibility?

Define Inductive reactance.

Derive an expression for the pressure exerted by a gas on the basis of the kinetic theory of gases.

A particle performing Linear S.H.M. has a maximum velocity 25 cm/sand maximum acceleration 100 cm/s². Find the period of oscillations.

What is an ideal gas?

Does an ideal gas exist in practice?

State the formula giving the relation between electric field intensity and potential gradient.

State unit and dimensions of Magnetic susceptibility.

State unit and dimensions of Magnetic susceptibility.

Derive expressions for the linear velocity at the lowest position, mid-way position and top-most position for a particle revolving in a vertical circle, if it has to just complete circular motion without string slackening at the top.

An air-cored solenoid, 40 cm long and of cross-sectional area 5 cm², is tightly wound with 400 turns of copper wire and carries a steady current of 10 A. (a) Calculate the self-inductance of the solenoid. (b) Find the emf induced if the current in the solenoid decreases to zero in 0.2 s.