List of top Physics Questions

The minimum distance of an object from the pole to obtain real image in case of a concave mirror is
Usage of fuse in a circuit prevents from
Angle of vision of a healthy adult human is
Focal length of the eye lens changes with the help of
The focal length of a lens depends on
The defect by which some people can not see near objects clearly but can see distant objects is called
A person is advised to use 5D lens. What is its focal length?
Direction of electric current and direction of electrons in a conductor are
Obstruction to the motion of electrons in a conductor is called
Which of the following is the equation for given circuit as per Kirchoff's loop law?
Which of the following is the equation for given circuit as per Kirchoff's loop law
A bulb is marked 60 W and 240 V. Find the resistance in the bulb.
If the focal length of a spherical mirror is 10 cm, what is the value of radius of curvature?
Which of the following is the formula for magnification in case of spherical mirror?
If a convex lens is placed in water, it's focal length
Every lens has ____ focal points.
Parallel beam of light after passing through a convex lens pass through a point called
A potentiometer with a cell of 2.4 volts and internal resistance of 2 Ω maintains potential drop across the resistance wire AB of length 2 m and resistance 10 Ω. A standard cell that maintains a constant EMF of ‘V’ volt with an internal resistance of 0.2 gives a balance point at 1.6 M length of the wire. The value of EMF of the second (standard) cell(V) is:
A force \( F \) applied on the wire of radius \( r \) and length \( L \) and change in the length of the wire is \( l \). If the same force \( F \) is applied on the wire of the same material and radius \( 4r \) and length \( 4L \), then change in length of the other wire is
The resultant of two forces acting at an angle of \( 120^\circ \) is \( 10 \, \text{kg-W} \) and is perpendicular to one of the forces. That force is
Two guns P and Q can fire bullets at speeds 2 km/s and 4 km/s, respectively. From a point on a horizontal ground, they are fired in all possible directions. The ratio of maximum or areas covered by the bullets fired by the two guns, on the ground is
Choose the incorrect statements.
If \( R \) and \( C \) denote resistance and capacitance of a material, then the dimension of \( CR \) will be
Charge on electron is
A bat emitting an ultrasonic wave of frequency \( 4.5 \times 10^4 \, \text{Hz} \) at speed of \( 6 \, \text{m/s} \) between two parallel walls. The two frequencies heard by the bat will be
Which of the following series spectrum of hydrogen atom lies in ultraviolet region?