Three point-charges are positioned on the x-axis. If the charges and corresponding positions are +32 mC at x = 0, +20 mC at x = 40 cm, and -60 mC at x = 60 cm, what would be the magnitude of the electrostatic force on the +32-mC charge?

If a student drops a stone from a cliff of height 35 m and time it takes to reach ground is 2.7 s, then what will be the acceleration due to gravity?

The speed of sound in water is four times its speed in air. When a sound wave of frequency 'n' and wavelength 'λ' enters from air into water, then what will be its frequency and wavelength respectively?

How many units of electricity will be consumed if you use a 65 watt electric bulb for 7.3 hours everyday for 21 days?

Measure altitudes in aircraft's, which instrument is used?

The height of the point vertically above the earth's surface, at which acceleration due to gravity becomes 1% of it's value at the surface (Radius of the earth = R) . What would be the surface?

Which is the illustrate the law of reciprocal proportions?

A car is moving with a uniform velocity on a rough horizontal road. What would be the answer according to Newton’s first law of motion?

The A.C. current gain of a transistor is 100. If the base current changes by 100uA, What will be the charge in collector current?

A 25 kW dc generator produces a potential difference of 250 V. If the resistance of the transmission line is 1, what percentage of the original power is lost during transmission?

A charge Q is placed on the x axis at x = +4.0 m. A second charge q is located at the origin. If Q = +75 nC and q = -8.0 nC, what will be the magnitude of the electric field on the y axis at y = +3.0 m?