physics

A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%; the mechanical advantage of the system is?

A. 36.0 B. 7.2 C. 5.0 D. 3.6 Correct Answer: Option D - 3.6 Explanation Mechanical Advantage = V.R ×…

5 years ago

The inner diameter of a small test tube can be measured accurately using a?

A. Micrometres screw gauge B. Pair of dividers C. Metre rule D. Pair of vernier calliper Correct Answer: Option D…

5 years ago

Calculate the effective capacitance of the circuit in the diagram given?

A. 4μf B. 3μf C. 2μf D. 1μf Correct Answer: Option D - 1μf

5 years ago

An object moves in a circular path of radius 0.5m with a speed of 1m/s¹. What is its angular velocity?

A. 8rads−¹ B. 4rads−¹ C. 1rads−¹ D. 2rads−¹ Correct Answer: Option D - 2rads−¹

5 years ago

In homes; electrical appliances and lamps are connected in parallel because?

A. less current will be used B. less voltage will be used C. parallel connection does not heat up the…

5 years ago

In the diagram shown; If the south-poles of two magnets stroke a steel bar; the polarities at T and V will respectively be?

A. north and south B. south and south C. north and north D. south and north Correct Answer: Option C…

5 years ago

Musical instruments playing the same note can be distinguished from one another owing to the difference in their?

A. quality B. pitch C. intensity D. loudness Correct Answer: Option B - pitch

5 years ago

Convex mirrors are used as driving mirrors because images formed are?

A. erect, Virtual and diminished B. erect, real and diminished C. erect, virtual and magnified D. inverted, virtual and diminished…

5 years ago

The differences observed in solids; liquids and gases may be accounted for by?

A. their relative masses B. their melting points C. the spacing and forces acting between the molecules D. the different…

5 years ago