Fundamental Quantities

Q.

Define physical quantity?

Q.

The Instrument used to measure the mass of an object is called______.

1. Beam-balance

2. Screw gauge

3. Meter scale

4. Spring-balance

Q.

What is the Instrument used to measure the weight of an object called?

1. Spring-balance

2. Beam-balance

3. Screw gauge

4. Meter scale

Q. What is the SI unit of electric current?

Q. What is SI unit?

Q. A car moves from x to y with a uniform speed Vu and returns to y with a uniform speed Vd . The average speed for this round trip is

Q.

Which instrument is used to measure the weight of an object?

1. Beam-balance

2. Screw gauge

3. Spring-balance

4. Meter scale

Q.

Differentiate between beam balance and electronic balance.

Q. Amount of matter contained in a body is called:

1. Mass
2. Density
3. Volume
4. Area

Q.

The average momentum of the molecule in a sample of an ideal gas depends on?

1. Number of moles

2. Temperature

3. Volume

4. None of the options

Q. Derivation of relation between molarity, density and mass fraction?

Q. The mass of an object mostly remains throughout the universe.

1. zero
2. negative
3. constant
4. variable

Q. A vehicle of mass 1500kg is moving along a curved path of length 314m with a speed of 20 m/s . if it takes a turn of 90 degree , the centripetal force needed by the vehicle?

Q.

Which of the following is/are units of temperature?

1. Kelvin

2. Celsius

3. Fahrenheit

4. All of the above

Q. Which of the following units is a base S.I unit?

1. Metre
2. Centimetre
3. Gram
4. Millisecond

Q.

Which of the below-given options are not fundamental units?

1. $\mathrm{cm}$

2. $\mathrm{kg}$

3. $\mathrm{centigrade}$

4. $\mathrm{volt}$

Q.

What is meant by "Vehicle A is moving faster than Vehicle B"? How do we find out which is faster? [2 MARKS]

Q.

Handspan, cubit, and footstep are non-reliable methods for measuring length. Explain?

Q. Two trains take 3 s to pass one another when going in the opposite but only 2.5 s if the speed of one is increased by 50% . What is the time one would take to pass the other when going in the same direction at their original speeds ?

Q.

What is meant by the mass of a body? What is the SI unit of mass?

Q.

Explain the mass of a substance?

Q.

How are the units classified? Give one example of each.

Q.

To use a Spring-balance we have to ensure________.

1. That the pointer reads zero before adding weight.

2. That the pointer becomes stationary after adding weight.

3. All of the above.

4. That the balance hangs vertically from a rigid support.

Q. A boat man can row with speed of 12 km/h in still water. If the river flows at 6 km/h, the direction in which the boat man should row to reach a point on the other bank directly opposite to the point of entry in the river is?

Q. Which of the following instruments is / are used to measure the weight of an object?

1. Beam balance
2. Screw gauge
3. Spring balance
4. Metre scale

Q.

Fill in the blanks using suitable word(s).

Mass is a _____ physical quantity.

Q. Which scientific unit is used to measure luminous intensity?

1. Mole
2. Kelvin
3. Kilogram
4. Candela

Q.

What is the Instrument used to measure the mass of an object called?

1. Meter scale

2. Spring-balance

3. Beam-balance

4. Screw gauge

Q. A bus appears to go with a speed of 25km/hr to a car driver driving at the rate 7km/hr northwards.if the bus actually travels in east direction its speed is

Q.

Which of the following are fundamental physical quantities:

1. length

2. time

3. speed

4. mass