Download App

Force, Work, Energy and Power — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsForce, Work, Energy and Power2 Marks
Question
The efficiency of a pulley is always less than 100%.
✓

Answer

The two reasons are:
(a) Some effort is wasted and overcoming the friction between the strings and the grooves of the pulley.
(b) Some effort is wasted in lifting up the movable block along with the load.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[2 Mark Question Answer]" from Force, Work, Energy and Power→Force, Work, Energy and Power — all question types→Physics STD 10 question papers→ICSE Board STD 10 question papers→ICSE Board question paper generator→

Similar questions

Make the correct choices in the following items :
A lens used as a magnifying glass
(i) ls a diverging lens
(ii) Produces a virtual image
(iii) ls placed with the object nearer the lens than the principle focus
→
A potential difference of 6 V is applied across a 3 Ω resistor. What is the current flowinq throuqh the circuit?
→
650 J of heat is required to raise the temp. of 0.25 kg of lead from 15°C to 35°C. Calculate the Sp. heat capacity of lead.
→
Where must a point source of light be placed in front of a convex lens so as to obtain a parallel beam of light?
→
Express the power (with sign) of a concave lens of focal length 20 cm.
→
No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.
→
Define one newton. Write the relation between the $S. I.$ unit and the $C.G.S.$ unit of force.
→
A boy fires a gun and hears the echo 2 seconds later. If he is 480 m away from a wall, calculate the velocity of sound in air.
→
A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
→
Why are the waves mentioned by you not audible to us?
→