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PHYSICS MCQ

Simple Machines · ICSE STD 6 (ICSE - English Medium). 12 questions.

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12 questions · timed · auto-graded

MCQ 11 Mark
Wheel is used with axle because
  • A
    sliding friction is less than the roffing friction
  • ✓
    rolling friction is less than the sliding friction
  • C
    they work as the inclined plane
  • D
    They help us to change the direction of force.
Answer
Correct option: B.
rolling friction is less than the sliding friction
rolling friction is less than the sliding friction
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MCQ 21 Mark
A pulley is used because of it
  • A
    has the mechanical advantage greater than one
  • B
    has $100\%$ efficiency
  • ✓
    helps to apply the force in a convenient direction
  • D
    requires more effort to raise a less load.
Answer
Correct option: C.
helps to apply the force in a convenient direction
helps to apply the force in a convenient direction
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MCQ 31 Mark
The mechanical advantage of a lever is equal to$.......$
  • A
    $\frac{\text { Load arm }}{\text { Effort arm }}$
  • ✓
    $\frac{\text { Effort arm }}{\text { Load arm }}$
  • C
    Load arm $+$ Effort arm
  • D
    Load arm $-$ Effort arm
Answer
Correct option: B.
$\frac{\text { Effort arm }}{\text { Load arm }}$
The mechanical advantage of a lever is equal to $\frac{\text { Effort arm }}{\text { Load arm }}$.
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MCQ 41 Mark
Mechanical advantage of a machine is defined as:
  • A
    Load X Effort
  • ✓
    Load / Effort
  • C
    Load + Effort
  • D
    Effort / Load
Answer
Correct option: B.
Load / Effort
Load / Effort
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MCQ 51 Mark
For an ideal machine, the efficiency is
  • A
    greater than unity
  • B
    less than unity
  • ✓
    equal to unity
  • D
    depends on the value of load
Answer
Correct option: C.
equal to unity
equal to unity
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MCQ 61 Mark
A machine made up of two or more sloping surface is known as a
  • ✓
    wedge
  • B
    screw
  • C
    pulley
  • D
    lever
Answer
Correct option: A.
wedge
wedge
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MCQ 71 Mark
The effort required to lift a load of 800 N by using a lever having a mechanical advantage of 1.6 is
  • A
    1080 N
  • B
    240 N
  • C
    720 N
  • ✓
    500 N
Answer
Correct option: D.
500 N
500 N
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MCQ 81 Mark
The mechanical advantage of an inclined plane is always
  • ✓
    greater than 1
  • B
    less than 1
  • C
    equal to 1
  • D
    zero
Answer
Correct option: A.
greater than 1
greater than 1
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MCQ 91 Mark
A pair of scissors is an example of $a/an$
  • A
    wedge
  • ✓
    lever
  • C
    inclined plane
  • D
    screw
Answer
Correct option: B.
lever
lever
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MCQ 101 Mark
Which of the following is a Class $II$ lever?
  • A
    Pliers
  • B
    A beam balance
  • ✓
    A nut$-$cracker
  • D
    A knife
Answer
Correct option: C.
A nut$-$cracker
A nut$-$cracker
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MCQ 111 Mark
If the effort lies between the fulcrum and the load, then the lever belongs to which class?
  • A
    Class I
  • B
    Class II
  • ✓
    Class III
  • D
    Class IV
Answer
Correct option: C.
Class III
Class III
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MCQ 121 Mark
The force applied on a machine to do work is called the
  • A
    load
  • ✓
    effort
  • C
    efficiency
  • D
    fulcrum
Answer
Correct option: B.
effort
effort
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