11th Physics 2025 Chapter 4 MCQs
11th Physics 2025 Chapter 4 MCQs solution.
Tick the correct option.
4.1 A 1 Kg mass has potential energy of 1 joule relative to the ground when it is at a height of:
(a) 0.102 m
(b) 1 m
(c) 9.8 m
(d) 32 m
Correct option is (a)
==========================================
4.2 An iron sphere whose mass is 30 Kg has the same diameter as an aluminium sphere whose mass 10.5 Kg. The sphere are simultaneously dropped from a cliff. When they are 10 m from the ground, they have identical:
(a) accelerations
(b) momentums
(c) potential energies
(d) kinetic energies
Correct option is (a)
==========================================
4.3 A body at rest may have:
(a) speed
(b) velocity
(c) momentum
(d) energy
Correct option is (d)
==========================================
4.4 The height above the ground of a child on a swing varies from 0.5 m of his lowest point to 1.5 m at his highest point. The maximum speed of the child is approximately:
$$(a)\;1.5\;m\;s^{-1}$$
$$(b)\;4.4\;m\;s^{-1}$$
$$(c)\;9.8\;m\;s^{-1}$$
(d) depends upon child’s mass
Correct option is (b)
==========================================
4.5 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 between ball and air
(d) Contact force with hand
Correct option is (b)
==========================================
4.6 According to work-energy principle in linear motion, the work done on body is equal to:
(a) change in K.E
(b) change in P.E
(c) zero
(d) sum of K.E energy and P.E
Correct option is (a)
==========================================
4.7 Power of lamp is 6 W. How much energy does a lamp give out in 2 min?
(a) 12 J
(b) 20 J
(c) 3 J
(d) 720 J
Correct option is (d)
==========================================
4.8 A dry battery can deliver 3000 J of energy to a 2 W small electric motor before the battery is exhausted. For how many minutes does the battery run?
(a) 1500 min
(b) 100 min
(c) 50 min
(d) 25 min
Correct option is (d)
==========================================
4.9 The kinetic energy acquired by a mass m after travelling a fixed distance from rest under the action of a constant force is directly proportional to:
$$(a)\;\sqrt m$$
$$(b)\;1\;/\sqrt m$$
(c) m
(d) independent of m
Correct option is (d)
==========================================
4.10 A body moves a distance of 10 m along a straight line under the action of 5 N force. If the work done is 25 J, the angle which the force makes with the direction of motion of the body is:
(a) 0 degree
(b) 30 degree
(c) 60 degree
(d) 90 degree
Correct option is (c)
==========================================
Check! the some links below
You tube Channel sir Najam
Home Page Notes Punjab
