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Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

Which of the following is not correct precaution taken while using beam balance?

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

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

  3. The weights should be replaced into the weight box after weighting

  4. None
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Precaution taken while using beam balance. The weights should be carried with forceps. They should not be carried with bare fingers to avoid the change in its weight due to the presence of moisture and dust particles. Wet and hot objects should not be kept on the pan. When near the actual weight, the weights should always be tried in the descending order.

The beam should be lowered each time before adding or removing weights from the pan. The weight should be replaced into the weight box after weighting.

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

Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

Which of the following is/are correct condition(s) for a True Balance?

  1. Both arms must be of equal lengths

  2. Both pans must be of equal weights

  3. Both A and B

  4. None of A and B
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A balance to the true, must satisfy the following two conditions:
1. Both arms must be of equal lengths, and
2. Both pans must be of equal weights.

Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

The weights should be tried in descending order, for a beam balance, when we are :

  1. near the actual weight

  2. far from the actual weight

  3. measuring any weight as a constant practice

  4. making a rough estimation of the actual weight
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Using a beam balance, when we are near the actual weight, the weights should always be tried in the descending order.

Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

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

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

Identify the wrong way of handling a beam balance:

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

Wet objects should not be kept on the pan as :

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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

Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

Mark the correct statement regarding to beam balance.

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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.