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

A 10 μF capacitor is charged to a 25 volt of potential. The battery is disconnected and a pure 100 m H coil is connected across the capacitor so that LC oscillations are set up. Calculate the maximum current in the coil.

The second law of thermodynamics deals with transfer of ______.

Describe Rayleigh's criterion for resolution. Explain it for a telescope and a microscope.

Answer in brief.

The total impedance of a circuit decreases when a capacitor is added in series with L and R. Explain why?

Answer in brief.

The total impedance of a circuit decreases when a capacitor is added in series with L and R. Explain why?

Calculate the value of the capacity in picofarad, which will make 101.4 microhenry inductance to oscillate with a frequency of one megahertz.

Calculate the value of the capacity in picofarad, which will make 101.4 microhenry inductance to oscillate with a frequency of one megahertz.

1000 calories of radiant heat are incident on a body. If the body absorbs 400 calories of heat, find the coefficient of emission of the body. 

The second law of thermodynamics deals with the transfer of ______.

Describe Young’s double-slit experiment with a neat diagram showing points of maximum and minimum intensity. 

In which of the following devices, the eddy current is not used ______ 

Why and where are eddy currents are undesirable? How are they minimized? 

A charged 10 microfarad capacitor is connected to an 81 mH inductor. What is the angular frequency of free oscillations of the circuit?  

A charged 10 microfarad capacitor is connected to an 81 mH inductor. What is the angular frequency of free oscillations of the circuit?  

A radio can tune over the frequency range of a portion of the MW broadcast band (800kHz -1200kHz). If its LC circuit has an effective inductance of 200mH, what must be the range of its variable condenser? 

A radio can tune over the frequency range of a portion of the MW broadcast band (800kHz -1200kHz). If its LC circuit has an effective inductance of 200mH, what must be the range of its variable condenser? 

What are eddy currents?

The kinetic energy and angular momentum of a body rotating with constant angular velocity are E and L. What does `(2E)/L` represent?

Which of the following would permit finer detail to be examined using a microscope of a given numerical aperture?

Determine the limit of resolution of a telescope for the light of wavelength 500 nm if the telescope objective has diameter of 5.08 m.