List of top Physics Questions asked in UP JEE Polytechnic

Zener diode is used as an
Least count of vernier calipers is 0.01 cm. Measuring the length of an object reading of main scale is 2.7 cm and the fifth division of vernier scale coincide with any division of main scale. The length of object will be
Water falls from 100 metre height. What will be temperature rise per kg of water due to fall?
\(g = 10 \, \text{m/s}^2\), specific heat of water = 4200 Joule/kg°C
A sphere of 150 kg is kept on frictionless surface. A bullet of 0.15 kg mass with velocity 200 m/sec strikes the sphere and stops. After collision the velocity of sphere will be
Modulus of rigidity of a liquid is
Balance the equation
\[ {}^9_4\text{Be} + {}^4_2\text{He} \rightarrow {}^6_12\text{C} + \cdots \]
The material of permanent magnet has
Electrical conductivity of a semiconductor
The order of radius of the nucleus of an atom is
If velocity of light in air is \(3 \times 10^8\) m/s and that in water is \(2 \times 10^8\) m/s, then what would be the critical angle?
Two springs with spring constants \(K_1 = 1500 \, \text{N/m}\) and \(K_2 = 3000 \, \text{N/m}\) are stretched by the same force. The ratio of potential energy stored in spring will be
A cycle tyre bursts suddenly. This represents an
A man can see upto 5 metre clearly. To see clear upto 10 m, the focal length of lens will be
Length of a rod increases 0.2% on increasing the temperature by 100°C. The value of coefficient of linear expansion of material of rod is
A force is applied on a 6 gm mass (at rest) for 20 seconds. After no force is exerted on it and after travelling distance of 50 cm in 5 seconds, mass stops. The amount of force in Newton will be
A particle of charge ‘q’, mass ‘m’ and velocity ‘v’, enters perpendicular to a magnetic field ‘B’, force on particle will be
In a 10 cm long horizontal wire, 5 Amp current is flowing. The mass of the wire is \(3 \times 10^{-3}\) kg/m. What will be the field to keep wire stable?
When \(10^{14}\) electrons are removed from a neutral metal sphere, the charge on the sphere becomes
In the following figure, the equivalent resistance between ‘A’ and ‘B’ will be
equivalent resistance between ‘A’ and ‘B’
A particle is moving along a circular track of radius 1 m with a uniform speed. The ratio of the distance covered and the displacement in half revolution is:
Magnetic flux of a 20-turn coil is reduced to zero from 0.3 weber in one second. Then the induced e.m.f between the terminals of the coil is:
100 gm of water at \( 60^\circ C \) is added to 180 gm of water at \( 95^\circ C \). The resultant temperature of the mixture is:
The electric field strength at a point in an electric field is 30 N/C. Find the force experienced by a charge of 20 C at that point.
Two unlike parallel forces of 2 N and 16 N act at the ends of a uniform rod of 21 cm length. The point where the resultant of these two forces acts at a distance of .............. from the greater force.
Two resistances combine in series order to provide 50 ohms resultant resistance, and when they combine in parallel order, they provide 8 ohms resultant resistance. Then the value of each resistance is: