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

Which of the following transition will have highest emission wavelength?

The amplitude of sound is doubled and the frequency is reduced to one fourth. The intensity of sound at the same point will be ____________.

lf the length of a stretched string is shortened by 40 % and the tension is increased by 44%, then the ratio of the final and initial fundamental frequencies are ____________.

Which of the following is TRUE?

The length of a potentiometer wire is L. A cell of e.m.f E is balanced at length L/3 from the positive end of the wire. If the length of wire increases by L/2, then the same cell will give balance point at length ____________.

The equation of a stationary wave is given by 2 sin `((pi"x")/15) "cos" (48 pi"t").`The distance between a node and its next antinode is ____________.

The rms speed of oxygen molecule in a gas is u, If the temperature is doubled and the molecules dissociates into two atoms, the rms speed will be ______.

A potentiometer wire of Length 10 m is connected in series with a battery. The e.m.f. of a cell balances against 250 cm Length of wire. If length of potentiometer wire is increased by 1 m, the new balancing length of wire will be ____________.

A body of mass 1 kg is suspended from a spring of negligible mass. Another body of mass 500 g moving vertically upwards hits the suspended body with a velocity 3 ms^-1 and gets embedded in it. If the frequency of oscillation of the system of the two bodies after collision `10/pi` Hz, the amplitude of motion and the spring constant are respectively ____________.

If the e.m.f of a cell is not constant in the metre bridge experiment, then the ____________.

If wavelength for a wave is `lambda = 6000  Å,` then wave number will be ____________.

Which of the following is true for a potentiometer?

The wave described by y = 0.35 sin (27πt - 10πx), where x and y are in metre and tin second, is a wave travelling along the ______.

To determine the internal resistance of a cell by using potentiometer, the null point is at 1 m when cell is shunted by 3 Ω resistance and at a length 1.5 m when cell is shunted by 6 Ω resistance. The internal resistance of the cell is ______.

A cell of e.m.f. 'E' is connected across a resistance 'R'. The potential difference across the terminals of the cell is 90% ofE. The internal resistance of the cell is ______.

Sensitivity of a given potentiometer can be decreased by ______.

Three identical coils X, Y and Z are placed with their planes parallel to each other. Coils X and Z carry current as shown in the figure. Coils X and Y are fixed and coil Z is moved towards Y, then ______.

A potentiometer wire of length 100 cm has a resistance of 10 `Omega.` It is connected in series with a resistance and an accumulator of e.m.f 2 V and of negligible internal resistance. A source of e.m.f 10 mV is balanced against a 40 cm length of the potentiometer wire. The value of the external resistance is ____________.

Let the series limit for Balmer series be 'λ₁' and the longest wavelength for Brackett series be 'λ₂'. Then λ₁ and λ₂ are related as ______.

Ratio of pressures exerted by two gases is 4 : 3 and their densities are in the ratio 3 : 4. The ratio of their R.M.S. velocities is ____________.