Question

1. The mains power supply of a house is through a 2A fuse. How many 50W bulbs can be used in this

house at the normal voltage?

A. 7

B. 8

C. 5

D. 6


2. In your city electricity costs 40 paise per kilowatt hour. You pay for:

A. Electric current

B. Electric energy

C. Electric charge

D. Electric power


3. A magnetic field line is used to find the direction of:

A. South-north

B. A compass needle

C. A bar magnet

D. Magnetic field


4.Which one of the given statements is not true?

A. In a house circuit, lamps are used in parallel

B. Switches, fuses and circuit breakers should be placed in the neutral wire

C. An electric iron iron has its earth wire connected to the metal case to prevent the user

receiving a shock


D.When connecting a three-core cable to a 13 A three-pin plug, the red wire goes to the live

pin


5. A magnetic field line is used to find the direction of:

A. South-north

B. A compass needle

C. A bar magnet

D.Magnetic field


6. The magnetic field lines inside a current-carrying solenoid, are:

A. Along the axis and parallel to each other

B. Circular, but they do not intersect each other

C. Circular at the ends inside the solenoid

D.All of these


7. A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of

force will be:

A. Only in horizontal plane around the magnet

B. Only in vertical plane around the magnet

C. In horizontal as well as in vertical planes around the magnet

D. In all planes around the magnet

8. ___________ are generally made up of pure tin or an alloy of tin with other metals like copper.

A. Metal wires

B. Fuse wires

C. Circuit

D.Electric iron


9. The most suitable material for making the core of an electromagnet is:

A. Soft iron

B. Brass

C. Aluminium

D.Steel


10. The north pole of earth magnet is in the:

A. Geographical south

B. Geographical east

C. Geographical west

D.Geographical north


11. An electric fuse is used to prevent: A. Short circuit B. Overload

A. Only A

B. Only B

C. Both A and B

D.None of these


12. Which of the given is not attracted by a magnet?

A. Steel

B. Cobalt

C. Brass

D.Nickel


13. Overloading happens because:

A. Of connecting many appliances to a single socket

B. Short circuits

C. Of hike in the supply voltage

D.Any of these


14. Which of the given correctly describes the magnetic field near a long straight wire?

A. The field consists of straight lines perpendicular to the wire

B. The field consists of straight lines parallel to the wire

C. The field consists of radial lines originating from the wire

D.The field consists of concentric circles centred on the wire


15. The shape of the earth’s magnetic field resembles that of an imaginary:

A. U-shaped magnet

B. Straight conductor carrying current

C. Current-carrying circular coil

D. Bar magnet​

Answer 1

Answer:

1] D

2] C

3]D

Explanation:

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