Kerala (English Medium) Std 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
The potential difference between live wire and neutral wire in India is

(A) 110 V	(B) 50 V
(C) 220 V	(D) None

Question-2
Carbon brushes are used in

(A) Electric motor	(B) Electromagnet
(C) Bar magnet	(D) None

Question-3
An electric generator actually act as a

(A) Source of electric charge	(B) Source of heat energy
(C) Electromagnet	(D) Converter of energy

Question-4
Which of the following domestic appliance uses an electric motor?

(A) Electric fan	(B) Milk cooker
(C) Pressure cooker	(D) Cooking gas

Question-5
The regions of concentrated magnetic strength inside the magnet just near its ends are

(A) Magnetic poles	(B) Magnetic field
(C) Magnetic Ends	(D) None of these

Question-6
The maximum safe current allowed to flow through a fuse before it melts is

(A) Fuse rating	(B) Power rating
(C) Electrostatic	(D) None of these

Question-7
The charged body at rest produces

(A) Electric field	(B) Magnetic field
(C) Neither A or B	(D) Both A & B

Question-8
The wire having black plastic covering is a

(A) Live wire	(B) Neutral wire
(C) Earth wire	(D) None

Question-9
The depletion layer in the PN junction region is caused by

(A) Drift of holes	(B) Diffusion charge carriers
(C) Migration of impurity atoms	(D) Drift of electrons

Question-10
The wire having red plastic covering is

(A) Live wire	(B) neutral wire
(C) Earth wire	(D) None

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Std 9

Kerala (English Medium)

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