11th class Physics chapter 4 online mcq test with answers for ICS part 1 Physics chapter 4(Work and Energy)

Question # 1

Kilowatt hour is unit is.

Power
A
Work
B
Force
C
Momentum
D

Question # 2

When a ball is thrown vertically upward and then falls back to the ground, which force can be considered conservative in this scenario.

Air resistance
A
Gravity
B
Friction betwene ball and air
C
Contant force with hand
D

Question # 3

If P= Pressure, delta V = change in volume, P delta V represents.

Density
A
Work
B
Teperature
C
Power
D

Question # 4

1 kilowatt is equal =

1000 J /s
A
106 watt
B
0.1 x 10³ Watt
C
6.25 x 10 ^{25 Watt}
D

Question # 5

An iron sphere whose mass is 30 kg has the same diameter as an aluminium sphere whose mass is 10.5 kg. The spheres are simultaneously dropped form a cliff. When they are 10 m fromt he gorund, they have identical.

Accelerations
A
Momentums
B
Potential engergies
C
Kinetic energies
D

Question # 6

Which one of the folloiwng is/are correct.

Work is positive if 0< 90^o
A
Work is 0 if θ 90^o
B
Work is negative if θ 90^o
C
All of these
D

Question # 7

The height above the gound of a child on a swing varies form 0.5 m of his lowest point to 1.5 m at his highst point. The maximum speed of the child is approximatley.

1.5 ms -1
A
4.4 ms-1
B
9.8 ms -1
C
Depends upon child's mass
D

Question # 8

Escape velocity depends upon.

Mass of the body
A
Radius of the body
B
Radius of the planet
C
Radius of the Earth
D

Question # 9

A body rest may have.

Speed
A
Energy
B
Velocity
C
Momentum
D

Question # 10

The consumption of eergy by a 60 watt bulb in 2 secinds is

130 J
A
120 J
B
160 j
C
0.02 J
D

Question # 11

Absolute P.E. of a body of mass"m" at a distance"r" from earth centre is.

[-GM/r]
A
- Gr/ M
B
-Gmr
C
GmM /r
D

Question # 12

If the velocity of the body becomes double and mass become half thenints K.E.

Becomes double
A
Beocmes for time
B
In halved
C
Becomes eight time
D

Question # 13

Power can be defined as the scalar product of.

force and displacemnt
A
Force and velocity
B
Force and time
C
Force and mass
D

Question # 14

A body of mass 0.2 kg initially moving with velocity 10 m/s comes to rest in 1 m. how much retarding force acts on it.

10 N
A
20 N
B
40 N
C
200 N
D

Question # 15

The dimension of power

[ML2 T-3]
A
[ML-1T-1]
B
[ML2T2]
C
[ML-2T-4]
D

Question # 16

If P = pressure, Deltat V = change in volume, P Delta V represents

Work
A
Density
B
Power
C
Temperature
D

Question # 17

If a body mass 2 kg is raised verticaly through 2 m then the work done will be.

50 J
A
-39.2 J
B
35 J
C
40 J
D

Sr.#	Question	Answer
1	1 kilowatt is equal=	A. 1000J/S B. 106 Watt C. 0.1 x 10 ² watt D. 6.25 x 10 ²⁵ J
2	Power can be defined as the scalar product of.	A. force and displacemnt B. Force and velocity C. Force and time D. Force and mass
3	The dimension of power	A. [ML2 T-3] B. [ML-1T-1] C. [ML2T2] D. [ML-2T-4]
4	A body of mass 0.2 kg initially moving with velocity 10 m/s comes to rest in 1 m. how much retarding force acts on it.	A. 10 N B. 20 N C. 40 N D. 200 N
5	If P= Pressure, delta V = change in volume, P delta V represents.	A. Density B. Work C. Teperature D. Power
6	An iron sphere whose mass is 30 kg has the same diameter as an aluminium sphere whose mass is 10.5 kg. The spheres are simultaneously dropped form a cliff. When they are 10 m fromt he gorund, they have identical.	A. Accelerations B. Momentums C. Potential engergies D. Kinetic energies
7	The work done in lifting a boyd of mass m from surface of the earth to an infinite distance is.	A. K.E. B. Absolute P.E. C. Elastic P.E. D. Absolue K.E
8	Th dimension of powr is.	A. [ML2 T-3] B. [ML-1T-1] C. [ML2T2] D. [ML-2T-4]
9	Power of lamp is 6 W. How much energy does a lamp give out in 2 min?	A. 12 J B. 720 J C. 20 J D. 3 J
10	When a ball is thrown vertically upward and then falls back to the ground, which force can be considered conservative in this scenario.	A. Air resistance B. Gravity C. Friction betwene ball and air D. Contant force with hand

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Kilowatt hour is unit is.

When a ball is thrown vertically upward and then falls back to the ground, which force can be considered conservative in this scenario.

If P= Pressure, delta V = change in volume, P delta V represents.

1 kilowatt is equal =

An iron sphere whose mass is 30 kg has the same diameter as an aluminium sphere whose mass is 10.5 kg. The spheres are simultaneously dropped form a cliff. When they are 10 m fromt he gorund, they have identical.

Which one of the folloiwng is/are correct.

The height above the gound of a child on a swing varies form 0.5 m of his lowest point to 1.5 m at his highst point. The maximum speed of the child is approximatley.

Escape velocity depends upon.

A body rest may have.

The consumption of eergy by a 60 watt bulb in 2 secinds is

Absolute P.E. of a body of mass"m" at a distance"r" from earth centre is.

If the velocity of the body becomes double and mass become half thenints K.E.

Power can be defined as the scalar product of.

A body of mass 0.2 kg initially moving with velocity 10 m/s comes to rest in 1 m. how much retarding force acts on it.

The dimension of power

If P = pressure, Deltat V = change in volume, P Delta V represents

If a body mass 2 kg is raised verticaly through 2 m then the work done will be.

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