The two arms of a balanced are of unequal length. An object when placed in the left pan of the balance weighs 4 kg. The same object when placed in the right pan of the balance weighs 9 kg. The actual (or) true mass of the object is

A physical balance has its arms of unequal length. A body weight 18 kg if kept in one pan and weight 8 kg. If kept in the other pan. The true weight of the body is

A body weighs 6gms when placed in one pan and 24gms when placed on the other pan of a false balance. If the beam is horizontal when both the pans are empty, the true weight of the body is :

A beam balance of unequal arm length is used by an unscruplus trader. When an object is weighed on left pan. The weight i found to be W_(1) . When the object is weighed on the right plane, the weight is found to be W_(2) . If W_(1) ne W_(2) , the correct weight of the object is

A physical balance has its arms of length 60cm and 40cm. What weight kept on the pan of the longer arm will balance an object of weight 100 gf kept on the other pan?

In a physical balance working on the principle of moments, when 5 mg weight is placed on the left pan, the beam becomes horizontal. Both the empty pans of the balance are of equal mass. Which of the following statements is correct ?

In a physical balance working on the principle of moments, when 5 mg weight is placed on the left pan, the beam becomes horizontal. Both the empty pans of the balance are of equal mass. Which of the following statements is correct ?

A small coil C with N=200 turns is mounted on one end of a balance beam and introduced between the poles of an electromagnetic as shown in Fig. The area of the coils is S=1cm^2 , the length of the right arm of the balance beam is l=30cm. When there is no current in the coil the balance is in equilibrium. On passing is a currentI=22mA through the coil, equilibrium is restored by putting an additional weight of mass m=60mg on the balance pan. Find the magnetic induction field (in terms of x 10^-1T ) between the poles of the electromagnetic assuming it to be uniform.

Figure shows a light spring balance connected to two blocks of mass 20 kg each. The graduations in the balance measure the tension in the spring. A. What is the reading of the balance? B. Will the reading change if the balance is heavy, say 2.0 kg? c. What will happen if the spring is light but the blocks have unequal masses?

When an object is placed between two parallel mirrors, then number of images formed are

When the two plane mirror are parallel to each other, then the number of images of an object placed between them is