List of top Physics Questions asked in Delhi UMET/DPMT

How many $ 1\,\mu F $ capacitors must be connected in parallel to store a charge of $1\, C$ with a potential of $110\, V$ across the capacitors?

The work done by an applied variable force $F=x +x^{3}$ from $x=o m$ to $x=2, m$ where $x$ is displacement, is

The reduced mass of two particles having masses $m$ and $2\, m$ is

The mean free path of collision of gas molecules varies with its diameter $(d)$ of the molecules as

A body of mass $M$ starts sliding down on the inclined plane where the critical angle is $\angle ACB = 30^{\circ}$ as shown in figure. The coefficient of kinetic friction will be

When an $AC$ voltage is applied to a $L-C-R$ circuit, which of following is true ?

If the charge on a capacitor is doubled, the value of its capacitance $C$ will be

When a lens of refractive index $ n_{1} $ is placed in a liquid of refractive index $ n_{2}$ the lens looks to be disappeared only if

The density of a nucleus of mass number $A$ is proportional to

A radioactive isotope has a half-life of $T \,yr$. How long will it take the activity to reduce to $1\%$ of its original value?

Resistance of tungsten wire at 150$^{\circ}$C is $133 \Omega$. Its resistance temperature coefficient is $0.0045^{\circ}$C. The resistance of the wire at 500$^{\circ}$C will be

A galvanometer coil has a resistance of $10 \, \Omega $ and the ammeter shows full scale deflection for a current of $1\,mA$. The shunt resistance required to convert the galvanometer into an ammeter of range $0-100\,mA$ is about

The critical angle for total internal reflection in diamond is $ 24.5^{\circ} $ . The refractive index of the diamond is

For what distance is ray optics a good approximation when the aperture is $4 \,mm$ wide and the wavelength is $500 \,nm$?

An AC voltage is applied to a pure inductor $L$, drives a current in the inductor. The current in the inductor would be

Nichrome or Manganin is widely used in wire bound standard resistors because of their

Activity of radioactive element decreased to one-third of original activity $R_{o}$ in $9\, yr$. After further $9\, yr$, its activity will be

Angle of repose is equal to the angle of limiting friction. When the body is just at the point of motion, the force of friction in this stage is called limiting friction.

If the colour code of carbon resistor is as follows, then give the value of its resistance in $k \, \Omega$, Colour of I strip-yellow Colour of II strip-blue Colour of III strip-orange Colour of IV strip-gold

In a potentiometer, the null point is received at $7th$ wire. If now we have to change the null point at the $9th$ wire, what should we do?

In $R-C$ circuit $\omega=100\, rad \,s ^{-1},\, R =100\, \Omega,\, C =20\, \mu\, F$. What is impedance?

Masses $m$ and $M$ on pulley move $0.6\, m$ in $4\, s$. What is ratio of $ \frac{m}{M} $ ?

Two identical concentric rings each of mass $m$ and radius $R$ are placed perpendicularly. What is the moment of inertia about axis of one of the rings

The angle of minimum deviation for a prism is $40^{\circ} $ and the angle of the prism is $60^{\circ} $ . The angle of incidence in this position will be

Consider a vehicle going on a horizontal road towards east. Neglect any force by the air. The frictional force on the vehicle by the road