Calculate the amount of heat generated in an external load of resistance 89 if an alternating current of peak value 5A is passed through for 100s.
A. 20,000J B. 10,000J C. 5,000J D. 4,000J E. 200J Correct Answer: Option A – 20,000JThe diagram below illustrates a variation of the displacement y of a wave-particle with time t. lf the velocity of wave is 250ms-1. Calculate the distance between two successive particles which are in phase
A. 20m B. 2.5m C. 3.0m D. 5.0m E. 50.0m Correct Answer: Option B – 2.5m
How far from the centre of a storm is an observer who hears a thunder clap 2s after the lightning flash?
The speed of sound in air is 330ms-1. How far from the centre of a storm is an observer who hears a thunder clap 2s after the lightning flash? (Neglect the time taken by light to travel to the observer) A. 1320m B. 660m C. 600m D. 330m E. 165m Correct Answer: Option D...The distance between two successive crests of a water is 1m. lf a particle on the surface of the water makes two complete vertical oscillations in 1 second. Calculate the speed of the wave
A. 0.5 ms-1 B. 1.0 ms-1 C. 2.0ms-1 D. 3.0ms-1 E. 4.0ms-1 Correct Answer: Option C – 2.0ms-1
A string of length 1.0 m vibrates in 10 loops. If the total mass of the string is 1.0 x 10−³ kg and the tension in it is 10N, calculate the frequency of the vibration.
A. 50Hz B. 100Hz C. 250Hz D. 400Hz E. 500Hz Correct Answer: Option A – 50HzProducts
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