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Differentiate between conductors and insulators.
Concept: Force on a Current Carrying Conductor in a Magnetic Field
State Fleming’s Right Hand Rule.
Concept: Electromagnetic Induction
Answer the following:
State the principles of the electric motor and electric generator.
Concept: Electromagnetic Induction
Answer the following question:
What is overloading? When does it occur? How can overloading be avoided?
Concept: Household Electrical Circuits
Choose the correct option:
A conductor rod of length (l) is moving with velocity (v) in a direction normal to a uniform magnetic field (B). What will be the magnitude of induced emf produced between the ends of the moving conductor?
Concept: Electromagnetic Induction
State true or false:
The frequency of AC is 50 Hz.
Concept: A.C. Generator
Observe the given figure of Fleming’s Right Hand Rule and write the labels of A and B correctly.

Concept: Electromagnetic Induction
The right-hand thumb rule is also called _______ rule.
Concept: Electromagnetic Induction
Which of the following scientist invented the rule of electromagnetic induction?
Concept: Electromagnetic Induction
Observe the given figure of Fleming's Left Hand Rule and write the labels of 'A' and 'B':

Concept: Force on a Current Carrying Conductor in a Magnetic Field
Observe the following diagram and answer the questions.

- Construction of which equipment does the above diagram show?
- On which principle does this equipment work?
- According to which law the coil ABCD rotates?
- Write the law in your own words.
- Where is this equipment used?
Concept: Electric Motor
Observe the following diagram and answer the questions.

- Explain the construction of the equipment shown in the figure.
- How is AC generated?
Concept: A.C. Generator
Observe the given figure of a current-carrying solenoid and write the labels of A and B correctly.

Concept: Applications of Ampere’s Circuital Law > Magnetic Field of a Long Straight Solenoid
Draw a neat diagram of a solenoid and name its various components.
Concept: Applications of Ampere’s Circuital Law > Magnetic Field of a Long Straight Solenoid
An object of 10 cm is placed in front of a plane mirror. The height of image will be …………….
(a) 5 cm
(b) 15 cm
(c) 20 cm
(d) 10 cm
Concept: Linear Magnification by Spherical Mirrors
Calculate the focal length of a corrective lens having power +2D.
Concept: Power of a Lens
A simple microscope is used by watch repairers. Give reason.
Concept: Spherical Mirrors
The distance between principal focus and optical centre of the lens is _________.
- diameter
- focal length
- principal axis
- optical centre
Concept: Images Formed by Sperical Lenses
Draw a ray diagram for concave mirror when the object is between centre of curvature and focus.
Concept: Spherical Mirror > Concave Mirror
In a Std. X class out of 40 students 10 students use spectacles, 2 students have positive power and 8 students have negative power of lenses in their spectacles.
Answer the following questions:
(1) What does the negative power indicate?
(2) What does the positive power indicate?
(3) Generally which type of spectacles do most of the students use?
(4) What defect of eyesight do most of the students suffer from?
(5) Give two possible reasons for the above defect.
Concept: Defects of Vision and Their Corrections > Myopia
