List of top Physics Questions

Head lost due to friction is 7 m in a pipe flow. The total head at the inlet of the pipe to be maintained for maximum power transmission through the pipe is:

The phase space is a

If the power and current gains of a transistor amplifier are 16500 and 100 respectively, then voltage gain is___

The purpose of a coupling capacitor in a transistor amplifier is to___

A voltage of 100 V dc is applied across two capacitors in series having capacitances C1 = 200 μF and C2 = 20 uF. A voltage drop across C1 is given as

In an open tank, water in present to a depth of 3 m and above it oil in present to a depth of 2 m. The intensity of pressure at the interface of the two fluid layers will be:
(Given specific gravity of oil = 0.7)

Given below are two statements :
Statement-l : We can join two P-N junctions back-to-back to form a transistor
Statement-II In a transistor the emitter base junction is forward biased while base collector junction is reverse biased.
In the light of the above statements, choose the correct answer from the options given below.

Match List I with List II

List I		List II
A.	Temperature correction (Ct)	I.	\(\frac{(P_m-P_o)L}{AE}\)
B.	Puel correction (Cp)	II.	\(\frac{h^2}{2L}\)
C.	Slope correction (Ch)	III.	\(\alpha(T_m-T_o)L\)
D.	Sag correction (Cs)	IV.	\(\frac{LW^2}{24n^2P_m^2}\)

Choose the correct answer from the options given below :

Operational amplifiers can be used as
A. Summing circuit
B. Voltage regulator
C. Integrator
D. Differentiator
E. Clipping Circuit
Choose the correct answer from the options given below.

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The gradient of velocity at right angles to the flow is called the shear rate.
Reason R: Shear rate is also known as velocity gradient or strain raste.
In the light of the above statements, choose the correct answer from the options given below :

A large air mass swirling around a low pressure area is known as -

The expression for hoop stress/circumferential stress (F1) generated in the material of thin cylinder due to internal pressure of fluid (P) is given by:
Where t = thickness of the wall of cylinder
d = internal diameter of cylinder

A solenoid of length 30 cm is wound uniformly with 3000 turns of wire. The wire carries a current of 10 A. What is the value of B on the axis within the solenoid? [μ₀=4лx10^-7 T m/A]

Biot number and Nusselt numbers are given by (Here L_C is characteristic length, K_S = Thermal conductivity for solid, K_f = Thermal conductivity of fluid)

The self-inductance of a solenoid is

A combinational logic circuit has three inputs A, B and C and one output Y. The output Y=1. when at least two inputs are 1. otherwise. Y=0. In its minimised SOP realization, the maximum number of two-input terms is:

What is the relation between Boyle temperature (T_B) and critical temperature (T_c) of a gas?

What happens if the electron spin is 3/2 instead of 1⁄2?

The COP of a heat pump is 40% of a reversible heat pump. The operating temperatures limits are \(2°C\) and \(25°C\). If 2.5 kW of heat is pumped by the heat pump in a room to be heated, then the power input to the heat pump is:

What will be the range of input voltage \(V_i\) in which the Zener diode shown in the figure below, conducts?

Consider Rydberg (hydrogen-like) atoms in a highly excited state with n around 400. The wavelength of radiation coming out of these atoms for transitions to the adjacent levels in the range.

If Thevenin's equivalent resistance of the given circuit seen from the open terminals is 2Ω. then the value of 'R' will be___

In the figure shown, where H= High input, L = Low Input

This multiplex is equivalent to ____

Which of the following expression represents the correct value of coefficient of curvature ?

A black brake as shown has a face width of 500 mm and mean coefficient of friction as 0.35. For a force of 500 N, the breaking torque (in Nm) is given as