List of top Physics Questions

If n observations are taken, then accidental errors are proportional to.
Match List I with List II
LIST I (Type of Device)LIST II (Characteristics/ Application)
AGTOITriggering Circuit
BUJTIITurn off by negative pulse rate
CTRIACIIIHigh Speed Switching
DMOSFETIVBidirectional Switching
Choose the correct answer from the options given below:
Theory of errors and adjustments deals with minimizing the effects of.
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 :
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 true length of a line is known to be 200m. When this is measured with a 20m tape, the length is 200.80m. The correct length of the 20m tape is.
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
The two lines AB and CD shown in h-s curve are, respectively:
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.
If the wind speed at a site is 6 m/s for half of the year and 10 m/s for the rest of the year calculate the energy content in a year.
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)
Consider the correct statements in respect of the thermoelectric instruments. The correct sequence is:
A. They indicate the rms value of current or voltage
B. They suffer from waveforms errors
C. They can be used for frequency range of the order of MHz
D. They have a low overload capacity
E. They have a high accuracy
Choose the correct answer from the options given below:
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.
Whenever two objects collide, the force generated is known as
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
What will be the separation between the coherent sources formed by a bi-prism whose inclined faces makes an angle of 2° with its base, the slit source being 0.10 m away from the bi-prism (Given μ = 1.5)?
The side of a square land was measured as 150m and is in error by 0.05m. What is the corresponding error in the computed area of the land?
The moment of the couple formed by the forces \(5\hat{i}+\hat{k}\) and \(-5\hat{i}-\hat{k}\) acting at the points (9, -1, 2) and (3, -2, 1) respectively, is
Choose the incorrect statement about Atomic absorption spectrometer:
Angular width of central maxima of a diffraction pattern of a single slit does not depend upon
Which of the following statements is/ an false?
(A) Solder is an alloy of tin and lead.
(B) Ductile materials result in continuous chip with Built up edge.
(C) Stellites are alloys of cobalt, chromium and vanadium.
(D) Electron beam machining does not require vaccum.
(E) In Plasma arc maching, MRR [Material Removal Rate] is higher then EDM and laser machining.
Choose the correct answer from the options given below:
If three forces acting on a rigid body are in equilibrium, then they must:
A 100 uF capacitor (C1) is initially charged to accumulate 150 μC. One unchanged capacitor (C2) 350 μF is parallelly connected to first one. In steady state, C1 will have
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.
Which methods you will prefer to estimate best the area of an irregular and curved boundary ?