List of top Physics Questions

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

Human ear normally hears sounds originating from the vibrating objects with a frequency between

Angular width of central maxima of a diffraction pattern of a single slit does not depend upon

Given below are two statements:
Statement - I: The formula of correct length is \(\frac{\text{Measure of length}}{\text{Nominal length of Tape}}\) × Actual length of tape.
Statement - II: The formula of sag correction is - \(\frac{-W^2}{24P^2}\times L\).
In the light of the above statements, choose the correct answer from the options given below :

If n observations are taken, then accidental errors are proportional to.

The Lissajous figure of two rectangular SHMs of equal frequency and phase difference of π/2 is

When bullet is fired from a gun, its potential energy is converted into ____ .

In Force current analogy, stiffness constant K is analogous to__

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:

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?

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

Choose the correct statements.
A. In CSI input current is Variable.
B. CSI requires feedback diodes.
C. Both controlled and uncontrolled switches are used in CSI.
D. CSI does not require filters.
E. CSI circuit requires large inductance.
Choose the correct answer from the options given below:

The radius of Mohr's circle of stress of a stressed element is 30 N/mm² and minor principal tensile stress is 15 N/mm². The major principal stress is:

Soap bubble attains spherical shape due to

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.

The Lissajous figure may be a straight line if the phase difference is

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:

If W is weight of the chain, L is span and P is tension or pull, then sag correction for chain line will be.

The digital circuit shown in below represents:

The digital circuit shown in below

If a, b, c, d are in Harmonic progression then
(A) a+d>b+c
(B) a+c=b+d
(C) ad > bc
(D) aⁿ +cⁿ>26ⁿ
(E) a+d<b+c
Choose the correct answer from the options given below :

If two simple harmonic motions having angular frequency 440 rad/s and 396 rad/s are superimposed, what will be the number of beats produced?

If three forces acting on a rigid body are in equilibrium, then they must:

A truss ABC loaded at B with a force of 10 kN as shown in the figure. The force in the member AC is:

The unit vectors orthogonal to the vector\(-\hat{i}+2\hat{j}+2\hat{k}\) and making equal angles with the x and y axis is (are)

If \(\hat{n_1}, \hat{n_2}\)are two unit vectors and \(\theta\) is the angle between them, then \(\cos\frac{\theta}{2}\) is equal to