MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions for Physics

The work done in blowing a soap bubble of radius R is W. The work done in blowing a bubble of radius 2R of the same soap solution is ______.

A parallel plate air condenser of capacity 10 µF is charged to a potential of 1000 V. The energy of the condenser is ______

In an LCR circuit, at resonance ______

Out of the following graphs, which graph shows the correct relation (graphical representation) for LC parallel resonant circuit?

Two identical strings of length I and 2I vibrate with fundamental frequencies N Hz and 1.5 N Hz, respectively. The ratio of tensions for smaller length to large length is ____________.

When open pipe is closed from one end third overtone of closed pipe is higher in frequency by 150 Hz, then second overtone of open pipe. The fundamental frequency of open end pipe will be ____________.

At the poles, a stretched wire of a given length vibrates in unison with a tuning fork. At the equator, for same setting to produce resonance with same fork. the vibrating length of wire ______.

The fundamental frequency of a closed pipe is 400 Hz. If `1/3`rd pipe !s tilled with water, then the 3 frequency of 2nd harmonic of the pipe will be (neglect and correction).

Two open pipes of different lengths and same diameter in which the air column vibrates with fundamental frequencies 'n₁', and 'n₂' respectively. When both pipes are joined to form a single pipe, its fundamental frequency will be ______.

If 'C_p' and 'C_v' are molar specific heats of an ideal gas at constant pressure and volume respectively. If 'λ' is the ratio of two specific heats and 'R' is universal gas constant then 'C_p' is equal to ______.

In a fundamental mode the time required for the sound wave to reach upto the closed end of a pipe filled with air is 't' second. The frequency of vibration of air column is ________.

In series resonance, LCR circuit, below the resonant frequency, the circuit is ____________.

A tube closed at one end and containing air produces fundamental note of frequency 256 Hz. If the tube is open at both ends, the fundamental frequency will be ____________.

An organ pipe has a fundamental frequency of 120 Hz. Its fourth overtone is 600 Hz. Find the type of the pipe.

An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the centre has magnitude ____________.

A system changes from the state (P₁, V₁) to (P₂, V₂) as shown in the figure. What is the work done by the system?

50 g of copper is heated to increase its temperature by 10° C. If the same quantity of heat is given to 5 g water, the rise in its temperature is [Specific heat of copper = 420 joule-kg^-1 °C^-1 , specific heat of water = 4200 joule-kg^-I °C^-1]

The difference between the apparent frequency of a source of sound as perceived by the observer during its approach and recession is 2% of the frequency of the source. If the speed of sound in air is 300 ms^-1, then the velocity of the source is ______.

Which of the following substances (A, B and C) has the highest specific beat?

Two uniform brass rods A and B of length land 2l and radii 2r and r respectively are heated to the same temperature. The ratio of the increase in the volume ofB to that of A is ____________.