List of top Physics Questions asked in UPCATET

NAND gate means
The number of turns in the primary coil of a transformer is 200 and the number of turns in the secondary is 10. If 240 V AC is applied to the primary, the output from the secondary is –
The output of the two-input OR gate is high
On increasing the reverse bias to a large value in a PN junction diode, current
Photons and alpha particles have the same de-Broglie wavelength. What is the same for both of them?
An Astronomical Unit, or AU, is the average distance between
Displacement current is due to -
The isotope generally used for the treatment of cancer is -
In Young's double slit experiment, the central point on the screen is -
Cyclotron cannot accelerate
Which of the following materials is the most suitable for making a permanent magnet?
Two sources of light are said to be coherent when both give out light waves of the same
What does the area under acceleration-time graph represent for any given time interval?
For which of the following is magnetic susceptibility negative?
Why can't the DC ammeter measure an alternating current?
A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is \( B \). It is then bent into a circular coil of \( n \) turns. The magnetic field at the centre of this coil of \( n \) turns will be
At a distance \( r \), two equal charges are kept and they exert a force \( F \) on each other. What is the force acting on each charge, if the distance between them is doubled and charges are halved?
The electrical resistance of the depletion layer is large because
A potentiometer is considered a versatile and accurate device to make an electrical measurement of EMF. Why?
What does an electric dipole experience when it is kept in a non-uniform electric field?
For a hollow spherical shell, potential \( V \) changes with respect to distance \( r \) from the centre. Which graph from the following represents this?
The image formed by the convex mirror is \( \frac{1}{n} \) times the object and has a focal length \( f \). What is the distance of the object from the mirror?
Which of the following does not exhibit polarization?
What will be the flux coming out of any surface of a cube, if a charge \( Q\,\mu\text{C} \) is placed at the centre of the cube?
A spring has a spring constant \( k \). When the spring is stretched through 1 cm, the potential energy is \( U \). What will be the potential energy if it is stretched by 4 cm?