A string of length 5cm is extended by 0.04m when a load of 0.8kg is suspended at the end. How far will it extend if a force of 16N is applied? [g = 10ms−2]

5 years ago

A. 0.04m B. 0.12m C. 0.01m D. 0.08m Correct Answer: Option D - 0.08m Explanation From Hoke's Law, F =…

Determine the focal length of a thin converging lens if the power is 5.0 dioptres?

5 years ago

A. 0.1 m B. 0.2 m C. 2.0 m D. 2.5 m Correct Answer: Option B - 0.2 m Explanation…

Which of the following is a scalar quantity ____?

5 years ago

A. Tension B. Weight C. Impulse D. Mass Correct Answer: Option D - Mass Explanation Scalar quantity is a quantity…

A radio station broadcast at a frequency of 600KHZ. If the speed of light in air is 3 × 10^8m/s¹. Calculate the wavelength of the radio wave

5 years ago

A. 2.20 × 10³m B. 5.0 × 10²m C. 5.0 × 10^5m D. 11.8 × 1011¹¹m Correct Answer: Option B…

A man of mass 50kg ascends a flight of stains 5m high in 5 seconds. If acceleration due to gravity is 10ms−² the power expended is

5 years ago

A. 100w B. 200w C. 400w D. 500w Correct Answer: Option D - 500w Explanation Power is the time rate…

The instrument used to measure the pressure of a gas is?

5 years ago

A. barometer B. thermometer C. hygrometer D. manometer Correct Answer: Option D - manometer Explanation Barometer is used to measure…

The net capacitance in the circuit below is?

5 years ago

  A. 80µF B. 6.0µF C. 4.0µF D. 2.0µF Correct Answer: Option D - 2.0µF Explanation For capacitance i n…

Which of the following operations can be used to convert an alternative current dynamo into a direct current dynamo?

5 years ago

A. number of turns in the coil is increased B. strength of the field magnet is increased C. slip rings…

When the r.m.s value of a source of electricity supply is given as 240v; it means that the peak value of the supply is?

5 years ago

A. 240v B. 340v C. 480v D. 57600v Correct Answer: Option B - 340v Explanation The relationship between the peak…

The mass of P is half that of Q. The ratio of the specific heat capacity pf P to Q is?

5 years ago

When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is…