List of practice Questions

If \(I_0\) is the intensity of the principal maxima in a single slit diffraction pattern, then what will be its intensity when the slit width is doubled?

Given \(\overrightarrow A\)x \(\overrightarrow B\) = \(\overrightarrow C\),
Where \(\overrightarrow A = x\hat i+y\hat j+3\hat k\), \(\overrightarrow B = y\hat î + x\hat j + 2\hat k\), \(\overrightarrow C=-5\hat î+5\hat k\)
Find the value of x and y

Figure shows Fraunhofer's diffraction due to a single slit. If first minima is obtained in the direction shown, then the path difference between ray 1 and ray 3 is

Rays

In the given question, choose the correct sequence of four statements given below:
A. It was found that the charge determined in each case
B. Which reveals that charge is quantised
C. When the experiment was repeated for a number of times
D. Was an integral multiple of elementary charge.
Choose the correct answer from the options given below.

What is the change in entropy when 10 g of ice at 0 °C is converted into water at the same temperature? The latent heat of ice is 80 cal/g.

Five Carnot engines operate between reservoir temperatures of
A. 100 K and 500 K
B. 200 K and 500 K
C. 400 K and 500 K
D. 200 K and 800 K
E. 200 K and 400 K
Arrange the engines according to their decreasing efficiencies.
Choose the correct answer from the options given below.

C₁ and C₂ represent the specific heat of a liquid and its saturated vapour where- as L is latent heat of vaporization. (T is the temperature) The correct option is

The Bose-Einstein distribution is applied on

Given below are two statements:
Statement-I : Law of conservation of momentum is invariant to Galilean transformation.
Statement-II Law of conservation of energy is invariant to Galilean transformation.
In the light of the above statements, choose the correct answer from the options given below.

What is the kinetic energy of an electron in the lowest energy level of a hydrogen atom?

A white dwarf star has volume V and contains N electrons so that the density of electron is \(n=\frac{N}{V}\). Taking the temperature of the star to be 0 K, what will be the expression for average energy per electron in the star?

A metal has work function \(w_0\) = 3.3×10^-19 J. What should be the minimum frequency of the incident radiation that can remove an electron from the metal surface? [Given h = 6.6x10^-34 J-s]

Consider an inertial frame S' moving at a speed \(\frac{c}{3}\) away from another inertial frame S along the common x-axis, where c is the speed of light. As observed from S', a particle is moving with speed \(\frac{c}{3}\) in the y' direction as shown in the figure. The speed of the particle as seen from S will be

inertial frame

Find the output voltage of a non-inverting OP-AMP having \(R_1\) = 100 kΩ, \(R_f\) = 500 kΩ, when the input signal is of 2.0 V.

If the stream function equation y=3x²-y², what is the magnitude of velocity at point (2.2)?

A scale of 1 inch = 50 ft is mentioned on an old map. What is the corresponding equivalent scale?

A car accelerate from it's Stationary position for 8 seconds and travels a distance of 280m. According to the mean value theorem, the speedometer at a certain time during accelaration must read exactly.

In Force current analogy, stiffness constant K is analogous to__

A moving coil ammeter having resistance of 10 ohm gives full scale. detection when current of 5 mA passed through it. The resistance to be connected to make the instrument to read up to 1 A is__

Match List I with List II

LIST I (Characteristic Equation)		LIST II (Nature of Output)
A	\(S^2+18S+64\)	I	Underdamped
B	\(S^2+25\)	II	Critically damped
C	\(S^2+12S+36\)	III	Undamped
D	\(S^2+8S+25\)	IV	Overdamped

Choose the correct answer from the options given below:

The transfer function for the diagram shown below is given by____

The transfer function

Match List I with List II

LIST I		LIST II
A	Damper Winding	I	To improvement the power factor
B	Laminated steel	II	To reduce the starch current
C	Auto transformer starters	III	Prevent hunting
D	synchronous condenser	Iv	Reduce eddy current loss

Choose the correct answer from the options given below:

Find \(R_{ equivalent}\) of the given circuit.

Circuit

In a fixed-bias common-emitter Circuit.
A. Maintaining \(I_B\) constant will not provide operating-point stability as ẞ changes.
B. IB should not be allowed to change as to maintain \(V_{CB}\) and \(I_C\), constant as ẞ changes.
C. The reverse saturation current Ico doubles for every 10 °C rise in temperature.
D. The value of stability factor \(S=(1+\beta)\)
E. The circuit is highly unstable

Match List I with List II

LIST I (Type of Device)		LIST II (Characteristics/ Application)
A	GTO	I	Triggering Circuit
B	UJT	II	Turn off by negative pulse rate
C	TRIAC	III	High Speed Switching
D	MOSFET	IV	Bidirectional Switching

Choose the correct answer from the options given below: