List of top Physics Questions

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.
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.
The Lissajous figure may be a straight line if the phase difference is
Whenever two objects collide, the force generated is known as
The SI system has seven basic units and these units pertain to the seven fundamental scientific quantities which one is not in the list of seven SI units-
Given below are two Statement:
Statement I: Speed is a vector quantity
Statement II: Velocity is a scalar quantity
In the light of the above statements, choose the correct answer from the options given below:
Given below are two statements:
Statement I: Accuracy is the degree of agreement between the measured value and the accepted true value of the given parameter.
Statement II: Determinate error are random in nature and occur when something went wrong during the measurement.
In the light of the above Statements, choose the correct answer from the options given below:
A scale of 1 inch = 50 ft is mentioned on an old map. What is the corresponding equivalent scale?
The arithmetical check for Height of Instrument method (HI) is -
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
Theory of errors and adjustments deals with minimizing the effects of.
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
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.
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
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]
In Force current analogy, stiffness constant K is analogous to__
When bullet is fired from a gun, its potential energy is converted into ____ .
Find \(R_{ equivalent}\) of the given circuit.
Circuit
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 stream function equation y=3x2-y2, what is the magnitude of velocity at point (2.2)?
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:
Soap bubble attains spherical shape due to
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.
Identify the operation which is commutative but not associative?
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