Tag: measuring mass

Questions Related to measuring mass

Identify the correct statement for measuring weight using a beam balance:

physics measurements and units measuring mass measurement of mass measuring instruments

  1. When near the actual weight, weights should be tried in decreasing order

  2. The beam should be lowered before adding or removing weights from the pan

  3. Both A and B are true

  4. Neither A nor B is true

Show answer
Correct Option: C
Explanation:

Precautions in using a beam balance: 
1. The weight should be replaced into the weight box after weighing. 
2. Wet and hot objects should not be kept on the plan. 
3. When near the actual weight ,weights should be tried in decreasing order. 
4. The beam should be lowered before adding or removing weights from the pan. 
5. The lever should be turned gently ,in order to prevent the knife edges from chipping.

So, both the given statements are true.

Identify the wrong way of handling a beam balance:

physics measurements and units measuring mass measurement of mass measuring instruments

  1. The lever should be turned fast in order to prevent the knife edges from chipping

  2. The weight should be replaced into the weight box after weighing

  3. Wet and hot objects should not be kept on the plan

  4. When near the actual weight ,weights should be tried in decreasing order

Show answer
Correct Option: A
Explanation:

The lever should not be turned fast. It should be turned gently. 
Meanwhile, let us look at all the precautions in using a beam balance: 
1. The weight should be replaced into the weight box after weighing. 
2. Wet and hot objects should not be kept on the plan. 
3. When near the actual weight ,weights should be tried in decreasing order. 
4. The beam should be lowered before adding or removing weights from the pan. 
5. The lever should be turned gently in order to prevent the knife edges from chipping.

While using a beam balance, if we do not turn the lever gently,

physics measurements and units measuring mass measurement of mass measuring instruments

  1. the knife edges will be chipped

  2. the lever will break

  3. the beam will break

  4. nothing will happen

Show answer
Correct Option: A
Explanation:

The lever should be turned gently in order to prevent the knife edges from chipping.

Wet objects should not be kept on the pan as :

physics measurements and units measuring mass measurement of mass measuring instruments

  1. the weight measured will be more than actual

  2. the weight measured will be less than actual

  3. the weight measured will be same as actual

  4. the pan may break down

Show answer
Correct Option: A
Explanation:

If a wet object is kept on the pan of a beam balance, the weight measured will be more than usual.

The weights in a beam balance should not be carried with bare fingers

physics measurements and units measuring mass measurement of mass measuring instruments

  1. to avoid change in weight due to moisture and dust

  2. to avoid change in weight due to chemical reactions

  3. just to make use of the forceps

  4. to avoid dropping of weights on the pan

Show answer
Correct Option: A
Explanation:

The weights for a beam balance should be carried with forceps. Those should not be carried with bare fingers to avoid the change in the weight due to  the presence of moisture and dust particles.

Fill in the blank:
In a beam balance, the beam should be ______ before adding or removing weights from the pan.

physics measurements and units measuring mass measurement of mass measuring instruments

  1. raised

  2. lowered

  3. held horizontal

  4. held vertical

Show answer
Correct Option: B
Explanation:

The beam, in a beam balance, should be lowered before adding or removing weights from the pan.

Mark the correct statement regarding to beam balance.

physics measurements and units measuring mass measurement of mass measuring instruments

  1. The physical balance consists of a light and rigid beam of brass, a metallic pillar, a wooden base, two pans, a metallic pointer, and an ivory scale

  2. The device is enclosed in a box to avoid the effect of wind

  3. A weight box containing standard weights comes with the balance

  4. All of the above

Show answer
Correct Option: D
Explanation:

The physical balance consists of a light and rigid beam of brass, a metallic pillar, a wooden base, two pans, a metallic pointer, and an ivory scale.

The device is enclosed in a box to avoid the effect of wind. A weight box containing standard weights comes with the balance. The mass of a body is found by placing the body in one pan, placing some standard weights in the other, and then calculating it from the standard weights placed and the resting point of the pointer.

When we are near to getting the actual weight in a beam balance, standard weights should be tried in :

physics measurements and units measuring mass measurement of mass measuring instruments

  1. decreasing order

  2. increasing order

  3. either increasing or decreasing order

  4. at random

Show answer
Correct Option: A
Explanation:

When we are near to getting the actual weight in a beam balance, standard weights should be tried in decreasing order.
Meanwhile, let us look at the precautions in using a beam balance: 
1. The weight should be replaced into the weight box after weighing. 
2. Wet and hot objects should not be kept on the plan. 
3. When near the actual weight ,weights should be tried in decreasing order. 
4. The beam should be lowered before adding or removing weights from the pan. 
5. The lever should be turned gently ,in order to prevent the knife edges from chipping.

Objects measured in beam balance should be

physics measurements and units measuring mass measurement of mass measuring instruments

  1. hot and wet

  2. hot but not wet

  3. wet but not hot

  4. neither hot nor wet

Show answer
Correct Option: D
Explanation:

While weighting an object using a beam balance, it should be ensured that the object is neither wet nor hot.
Meanwhile, let us look at all the precautions in using a beam balance: 
1. The weight should be replaced into the weight box after weighing. 
2. Wet and hot objects should not be kept on the plan. 
3. When near the actual weight ,weights should be tried in decreasing order. 
4. The beam should be lowered before adding or removing weights from the pan. 
5. The lever should be turned gently ,in order to prevent the knife edges from chipping.

An object is weighed in the following places using a spring balance. In which place will it weigh the heaviest?

physics measurements and units measuring mass measurement of mass measuring instruments

  1. On the Moon

  2. At the equator

  3. At the pole

  4. In outer space

Show answer
Correct Option: C
Explanation:
Acceleration due to gravity $g$ is the largest at the pole of the earth.
Weight of the object $W = mg$
$\implies$ $W\propto g$
Thus the object will weigh the heaviest at the pole of the earth