physics

A simple pendulum of length 0.4m has a period of 2s. What is the period a similar pendulum of length 0.8m at the same place?

A. 8s B. 4s C. 2√2s D. √2s Correct Answer: Option C - 2√2s Explanation T2 = √L²×T²/L1 = √(0.8×2²)/0.4…

5 years ago

The pair of physical quantities that are scalar only are?

A. volume and area B. moment and momentum C. length and displacement D. Impulse and time Correct Answer: Option A…

5 years ago

The resultant of two forces is 50N. If the forces are perpendicular to each other and one of them makes an angle 0f 30° with the resultant, find its magnitude.

A. 100.0N B. 57.7N C. 43.3N D. 25.0N Correct Answer: Option C = 43.3N Explanation F = 50Cos30° = 43.3

5 years ago

When a brick is taken from the earth’s surface to the moon; its mass?

A. remains constant B. reduces C. increases D. becomes zero Correct Answer: Option A - remains constant

5 years ago

When 210//82Pb decays to 206//80Pb; it emits?

A. two alpha and two beta particles B. an alpha particle C. one beta particle D. one alpha and one…

5 years ago

In a common emitter configuration; the output voltage is through the?

A. Resistor B. Base C. Collector D. Emitter Correct Answer: Option D - Emitter

5 years ago

Which gas produces a pink coloured light in a discharge tube?

A. Mercury B. Argon C. Air D. Neon Correct Answer: Option C - Air

5 years ago

Calculate the mass of the copper deposited during electrolysis when a current of 4A passes through a copper salt for 2 hours. [Ece of Copper z=3.3×10^7kgC−¹]

A. 2.9x10^5kg B. 9.5x10^-7kg C. 9.5x10^-3kg D. 2.9x10^4kg Correct Answer: Option C - 9.5x10^-3kg Explanation Mass = ZIT kg Mass…

5 years ago

When an atom undergoes a beta decay; the atomic number of the nucleus?

A. Remains unchanged B. Decreases by one C. Increases by one D. Becomes zero Correct Answer: Option C - Increases…

5 years ago

The magnitude of the angle of dip at the equator is?

A. 360° B. 0° C. 90° D. 180° Correct Answer: Option B - 0°

5 years ago