List of top Physics Questions asked in Punjab PMET

The length of second's pendulum is 1 m on earth. If mass and diameter of a planet is doubled than that of earth, then its length becomes
What effect occurs on the frequency of a pendulum if it is taken from the earth's surface to deep into a mine?
The angle between the dipole moment and electric field at any point on the equatorial plane is
The potentials of the two plates of capacitors are $+10\, V$ and $-10\, V$. The charge on one of the plates is $40\, C$. The capacitance of the capacitor is
To increase magnifying power of telescope, we should increase:
The crystal of diamond shines due to
If $ \sigma $ = surface charge density, $ \varepsilon $ = electric permittivity the dimensions of $ \frac{ \sigma}{ \varepsilon } $ are same as
If L is the coherence length and c the velocity of light, the coherent time is
For a wire of length $l$ , maximum change in length under stress condition is $2 \,mm$. What is the charge in length under same conditions when length of wire is halved?
A wire is cut into four pieces, which are put together by sides to obtain one conductor. If the original resistance of wire was $ R $ , the resistance of the bundle will be:
Which of the following statements is incorrect?
Which of the following statements is incorrect ?
A large ship can float but a steel needle sinks because of:
After 2 h $\frac{1}{16} th $ of initial amount of a certain radioactive isotope remains undecayed. The half-life of the isotope is
$10\, g$ of ice at $0^{\circ}\,C$ is mixed with $100\, g$ of water at $50^{\circ}\,C$. What is the resultant temperature of mixture?
A bomb explodes on the moon. How long will it take for the sound to reach the earth?
If a person sitting in a train moving with a constant velocity along a straight line, throws a ball vertically upwards then
A cylindrical bar magnet is kept along the axis of a-circular coil. If the magnet is rotated about its axis, passing through the centre, perpendicular to the face, then:
A spring has length $l$ and spring constant $k$ . If spring is divided in two equal parts then spring constant of each part is
In simple harmonic motion maximum velocity is at
The X-ray cannot be diffracted by means of an ordinary grating due to
The effective acceleration of a body, when thrown upwards with acceleration $a$ will be
In a reflecting astronomical telescope, if the objective (a spherical mirror) is replaced by a parabolic mirror of the same focal length and aperture, then
If a freely falling body travels in the last second a distance equal to the distance travelled by it in the first three second, the time of the travel is
Cyclotron is a device which is used to