GK Questions with answers on Science Physics (Magnetic field of electric Current) Set VI

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set VI ,in this set you will find repository of 10 Objective Type Questions that will help you to attune and equipped for different competitive examinations as well as academic examinations.

1. What is the electric potential of neutral wire?

A. Zero volt

B. 100 volt

C. 10 volt

D. 10 volt

Ans: A

2. What is the colour of insulation covering on live wire?

A. Green

B. Red

C. Black

D. Yellow

Ans: B

3. What is the colour of insulation covering on neutral wire?

A. Blue

B. Red

C. Green

D. Black

Ans: D

4. What is the rating of main fuse which is put in the live wire?

A. 10 amperes

B. 140 amperes

C. 50 amperes

D. 65 amperes

Ans: C

5. In which unit is the electrical energy consumed by us recorded?

A. Volt

B. Kilowatt-minute

C. Kilowatt-hour

D. Kilowatt-second

Ans: C

6. Which of the following are the two separate circuits in a house?

A. Lighting and power circuit

B. Open and closed circuit

C. Series and parallel circuit

D. None of the above

Ans: A

7. What is the fuse of lighting circuit?

A. 20 A fuse

B. 5 A fuse

C. 18 A fuse

D. 5 A fuse

Ans: B

8. What is the fuse of power circuit?

A. 5 A fuse

B. 18 A fuse

C. 15 A fuse

D. 10 A fuse

Ans: C

9. Which of the following devices is run by lighting circuit in the house?

A. Electric bulb

B. Tube-lights

C. Fans

D. All of the above

Ans: D

10. Which of the following devices is run by power circuit in the house?

A. Tube-lights

B. Electric iron

C. Television

D. Radio

Ans: B

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set V

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set V ,in this set you will find repository of 10 Objective Type Questions that will help you to attune and equipped for different competitive examinations as well as academic examinations.

1. If the current reverses direction after equal intervals of time, it is called:

A. Direct current

B. Alternating current

C. Induced current

D. Ionic current

Ans: B

2. At what time interval does the alternating current produced in India reverse its direction?

A. 1/100 second

B. 5 seconds

C. 1 minute

D. 5 minutes

Ans: A

3. Which of the following are the sources for producing alternating current?

A. Power house generators

B. Bicycle dynamos

C. Car alternators

D. All of the above

Ans: D

4. Which of the following convert’s mechanical energy into electrical energy?

A. Refrigerator

B. Fan

C. Electric motor

D. Electric generator

Ans: D

5. What is the frequency of alternating current produced in India?

A. 15 Hz

B. 50 Hz

C. 55 Hz

D. 65 Hz

Ans: B

6. In generators, the voltage produced can be increased by:

A. Coil with more turns

B. Rotating coil faster

C. Using coil with larger area

D. All of the above

Ans: D

7. Which of the following parts of the generators is stationary to produce electricity in large powerhouses?

A. Coil

B. Electromagnet

C. Slip rings

D. Carbon brush

Ans: A

8. Which of the following parts is not there in A.C. generator?

A. Slip rings

B. Coil

C. Commutator

D. Galvanometer

Ans: C

9. Where do we use transformers?

A. Power stations

B. Radio sets

C. Television

D. All of the above

Ans: D

10. How much electric potential does the live wire carry?

A. 100 volts

B. 150 volts

C. 185 volts

D. 20 volts

Ans: D

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set IV

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set IV ,in this set you will find repository of 10 Objective Type Questions that will help you to attune and equipped for different competitive examinations as well as academic examinations.

1. Which metal wire is used in the coil of the motor used commercially?

A. Aluminium

B. Silver

C. Nickel

D. Copper

Ans: D

2. The production of electricity from magnetism is called:

A. Electromagnetic induction

B. Electromagnetism

C. Electroluminescent wire

D. Electrostatics

Ans: A

3. The current produced by moving a straight wire in a magnetic field is called:

A. Direct current

B. Alternating current

C. Induced current

D. Electromagnetism

Ans: C

4. Who discovered the phenomenon of electromagnetic induction?

A. Michael Faraday and Joseph Henry

B. Albert Einstein

C. Isaac Newton

D. Galileo Galilei

Ans: A

5. The process of electromagnetic induction has led to the construction of:

A. Motors

B. Generators

C. Transformers

D. Switch

Ans: B

6. What needs to be reversed in order to reverse the direction of induced current?

A. Direction of magnetic field

B. Direction of current

C. Direction of force

D. All of the above

Ans: A

7. Magnitude of current induced in the coil can be increased by increasing:

A. Number of coil turns

B. Strength of magnet

C. Speed of coil rotation

D. All of the above

Ans: D

8. The production of electric current by moving a magnet inside a fixed coil of wire is a case of:

A. Electromagnetism

B. Electromagnetic induction

C. Making permanent magnet

D. None of the above

Ans: B

9. What is the current flowing in one direction called?

A. Alternating current

B. Induced current

C. Direct current

D. Ionic current

Ans: C

10. Which of the following are sources of direct current?

A. Dry cell

B. Car battery

C. D.C. generator

D. All of the above

Ans: D

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set III

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set III ,in this set you will find repository of 10 Objective Type Questions that will help you to attune and equipped for different competitive examinations as well as academic examinations.

1. Who discovered that when a current carrying conductor is placed in a magnetic field, a mechanical force exerted on the conductor makes it move?

A. Hans Christian Oersted

B. Michael Faraday

C. Benjamin Franklin

D. William Gilbert

Ans: B

2. The maximum force is exerted on a current carrying conductor when it is:

A. Perpendicular to magnetic field

B. Parallel to magnetic field

C. Swings in backward direction

D. All of the above

Ans: A

3. Which rule is applied to find the direction of force acting on the current-carrying conductor, if the direction of current and direction of magnetic field is known?

A. Maxwell’s right-hand thumb rule

B. Born rule

C. Hall Effect

D. Fleming’s left-hand rule

Ans: D

4. Which direction is indicated by the thumb in Fleming’s left-hand rule?

A. Current

B. Magnetic field

C. Motion of conductor

D. None of the above

Ans: C

5. What does the forefinger represent in the Fleming’s left-hand rule?

A. Magnetic field

B. Current

C. Motion of conductor

D. None of the above

Ans: A

6. The direction of deflection of a current-carrying conductor indicates the direction of:

A. Electric current

B. Force acting on it

C. Magnetic field

D. All of the above

Ans: B

7. Which device converts electrical energy into mechanical energy?

A. Motor

B. Generator

C. Windmill

D. Transformer

Ans: A

8. In which of the following devices is the electrical motor used?

A. Electric fans

B. Washing machine

C. Refrigerator

D. All of the above

Ans: D

9. In an electric motor, which device reverses the direction of current through a circuit?

A. Carbon brush

B. Coil

C. Commutator

D. Permanent magnet

Ans: D

10. The carbon strips used to pass electric current to the coil are known:

A. Commutator

B. Magnet

C. Battery

D. Brushes

Ans: D

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set II

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set II ,in this set you will find repository of 10 Objective Type Questions that will help you to attune and equipped for different competitive examinations as well as academic examinations.

1. The magnetic field produced by a current carrying solenoid is similar to the magnetic field produced by a: 

A. Bar magnet

B. Ring magnet

C. Rod magnet

D. Horse shoe magnet

Ans: A

2. The magnetic field lines inside the solenoid are:

A. Concentrated circles

B. Bigger circles

C. Parallel straight lines

D. None of the above

Ans: C

3. What is used to make electromagnets?

A. Circular wire

B. Solenoid

C. Straight wire

D. Horse shoe magnet

Ans: B

4. On what does the strength of magnetic field produced by a current carrying solenoid depend?

A. Number of turns in solenoid

B. Strength of current

C. Nature of core material

D. All of the above

Ans: D

5. An electromagnet consists of a long coil of insulated copper wire wound on a soft:

A. Aluminium core

B. Silver core

C. Zinc core

D. Iron core

Ans: D

6. Which of the following is not used for making electromagnets?

A. Carbon steel

B. Alnico

C. Cobalt steel

D. All of the above

Ans: D

7. Which of the following factors affects the strength of steel?

A. Number of turns in coil

B. Current flowing in coil

C. Length of air gap between poles

D. All of the above

Ans: D

8. Strong permanent magnets are used in:

A. Microphones

B. Loudspeakers

C. Voltmeters

D. All of the above

Ans: D

9. Which effect of current is used in detecting concealed current-carrying conductor in a wall?

A. Magnetic

B. Heating

C. Chemical

D. Ionic

Ans: A

10. Which are the two main organs of the human body where the magnetic field produced is significant?

A. Heart and kidney

B. Lungs and kidney

C. Heart and brain

D. Liver and stomach

Ans: C

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set I

GK Questions with answers on Science Physics (Magnetic field of electric Current) Set I ,in this set you will find repository of 10 Objective Type Questions that will help you to attune and equipped for different competitive examinations as well as academic examinations.

1. Who discovered the magnetic field of current?

A. William Gilbert

B. Hans Christian Oersted

C. Benjamin Franklin

D. Charles Augustin de Coulomb

Ans: B

2. Magnetic effect of current gives rise to which force?

A. Mechanical

B. Friction

C. Spring

D. Gravitational

Ans: A

3. Magnetic effect around a wire is due to:

A. The presence of metal

B. Current flowing in it

C. Circular loop

D. No current in it

Ans: B

4. Which of the following utilise magnetic effect of current?

A. Electric motor

B. Telephone

C. Radio

D. All of the above

Ans: D

5. What kind of magnetic field lines will be produced around a straight wire carrying current?

A. Bigger circles

B. Straight

C. Concentrated circles

D. Parallel straight

Ans: C

6. According to Maxwell’s right-hand thumb rule, what gives the direction of magnetic field lines around the wire?

A. Direction of thumb

B. Direction of fingers encircling wire

C. Direction opposite to thumb

D. Direction of index finger

Ans: B

7. Maxwell’s right-hand thumb rule is also known as:

A. Biot-Savart law

B. Hall Effect

C. Born rule

D. Corkscrew rule

Ans: D

8. Which of the following current carrying wires will have strong magnetic field?

A. Straight

B. Circular loop

C. Solenoid

D. All of the above

Ans: C

9. The strength of magnetic field produced by a current carrying circular coil can be increased by:

A. Increasing number of turns of wire

B. Increasing current flow

C. Decreasing radius of coil

D. All of the above

Ans: D

10. What is a long coil containing a large number of close turns of insulated copper wire called?

A. Straight

B. Solenoid

C. Circular loop

D. Stranded

Ans: B