(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

State the units of moment of force.

State when the moment of force is positive and when it is negative.

Two similar vehicles are moving with the same velocity on the road, such that one of thus is loaded and the other one is empty which of the two vehicles will require larger force to stop?

What is meant by the term ‘moment of force’? If the moment of force is assigned a negative sign then will the turning tendency of the force be clockwise or anti-clockwise?

State the effects that a force can produce. Given one example of each.

Write the expression for calculating the moment of force about a given point.

Two unlike forces (parallel) of 10 N and 25 N act at a distance of 12 cm. from each other. Find the point about which the body balance.

A uniform metre scale is balanced at a 40 cm mark when weights of 20 gf and 5 gf are suspended at 5 cm mark and 75 cm mark respectively. Calculate the weight of metre scale.

A uniform metre rule rests horizontally on a knife-edge at the 60 cm mark when a mass of 10 gram is suspended from one end. At which end must this mass be suspended? What is the mass of the rule?

The perpendicular distance between the point of application of force and turning point is 1.75 m when a force of 80 N acts on a rigid body. Calculate the moment of force.

Calculate the minimum distance between point of application of force and axis of rotation of a rigid body, if a force 125 N produces a moment of force of 25.75 Nm.

A couple of 15 N force acts on a rigid body, such that arm of couple is 85 cm. Calculate moment of couple in the SI system.

Calculate the magnitude of the force of a couple, when the arm of the couple is 63 cm and the moment of the couple is 21 Nm.

Calculate the length of arm of couple, if a force of 13 N produces a moment of couple of 14.3 Nm.

On a see-saw, two children of masses 30 kg and 50 kg are sitting on one side of it at distance 2 m and 2.5 m respectively, from its middle, where should a man of mass 74 kg sit to balance it?

Why fuse wire must always be connected in ‘live’ wire? Explain.

Where are the cartridge type fuse used?

What is the rating of fuse used in light and fan circuits?

What is the rating of fuse used in power circuits, in domestic use?

What is an ‘electric fuse’? State its two characteristics of electric fuse.