List of top Physics Questions

A coil of area  A  and N turns is rotating with angular velocity \( \omega\) in a uniform magnetic field \(\vec{B}\) about an axis perpendicular to \( \vec{B}\) Magnetic flux \(\varphi \text{ and induced emf } \varepsilon \text{ across it, at an instant when } \vec{B} \text{ is parallel to the plane of the coil, are:}\)

Identify the wrong statement among the following:
SI unit of electrical resistivity is
Which of the following is an insulator?
The image formed by a plane mirror is always:
The distance between the pole and the principal focus of a spherical mirror is called:
A diminished, virtual and erect image is formed by a
The mirror used by a dentist to see a large image of the teeth of the patients is
A ray of light travelling in air enters obliquely into water. This light ray
The focal length of a spherical mirror is \( 10 \, cm \). Its radius of curvature is:
The magnetic field produced by a current carrying circular loop is strongest at
In an electric circuit, the device used to prevent damage to the electrical appliances due to overloading is:
The region surrounding a magnet in which the influence of that magnet can be detected is called
One kilowatt hour is equal to
The magnetic field at all points inside a solenoid carrying electric current:
The power of an electric motor that takes \( 5 \, A \) electric current from a \( 220 \, V \) transmission line is:
The direction of force on a current carrying conductor in a magnetic field is given by
If the electric current through a copper wire increases, the magnitude of the magnetic field produced at a given point:
Work done to move a unit charge from one point to the other in an electric circuit is called
One coulomb is equivalent to the charge contained in nearly
If a net charge \( Q \) flows across any cross-section of a conductor in time \( t \), then the current \( I \) through the cross-section is
A continuous and closed path of an electric current is called an
The device used to measure electric current in a circuit is called:
SI unit of electrical potential difference is
In an electric circuit, three resistors \( 5 \, \Omega \), \( 10 \, \Omega \) and \( 15 \, \Omega \) are connected in series across a \( 60 \, V \) battery. Then the current flowing in the circuit is: