Physics GK Quiz Questions for Competitive Exams

The Doppler effect was discovered by Austrian scientist Christian Doppler in 1842, describing the change in frequency of any type of sound or light wave produced by a moving source with respect to an observer.

1. The device which is used to measure electric current in an electric circuit is called ammeter.

2. The resistance of an ideal ammeter is always zero and the electric circuit is always connected in series.

1. Induced current is highest when the direction of motion of the coil is perpendicular to the magnetic field.

1. The change in velocity of an object at equal time intervals is called uniform acceleration.

2. A freely falling object is an example of uniform acceleration.

1. Newton is the SI unit of force. It is a unit force that causes an acceleration of one meter per second on one kilogram of mass.

- Force can be defined as:
 Force =Mass x Acceleration

2. Joule is the SI unit of energy and work. It is the unit work done by one Newton force over a distance of one meter.

- Energy can be defined as:
 Energy = Work x Time

1. According to Dalton's atomic theory, atoms combine in small whole-number proportions to form compounds.

The columns are a correct match.

I. Electric current            - Ampere

II. Potential difference    -   c. Volt

III. Gapacitance               -   b. Farad   

IV. inductance                 -   a. Henryd.