# Physics/G.K Question and Answer - Physics Set VI Sample Test,Sample questions

## Question: `An electromagnet consists of a long coil of insulated copper wire wound on a soft:`

1.Aluminium core

2.Silver core

3.Zinc core

4. Iron core

Posted Date:-2021-03-14 21:40:29

## Question: `At what time interval does the alternating current produced in India reverse its direction?`

1. 1/100 second

2. 5 seconds

3. 1 minute

4.5 minutes

Posted Date:-2021-03-14 21:40:29

## Question: ` Magnitude of current induced in the coil can be increased by increasing:`

1.Number of coil turns

2. Strength of magnet

3.Speed of coil rotation

4.All of the above

Posted Date:-2021-03-14 21:40:29

## Question: ` The direction of deflection of a current-carrying conductor indicates the direction of:`

1.Electric current

2.Force acting on it

3. Magnetic field

4.All of the above

Posted Date:-2021-03-14 21:40:29

## Question: ` The production of electric current by moving a magnet inside a fixed coil of wire is a case of:`

1.Electromagnetism

2.Electromagnetic induction

3. Making permanent magnet

4.None of the above

Posted Date:-2021-03-14 21:40:29

## Question: ` What is the frequency of alternating current produced in India?`

1.15 Hz

2.50 Hz

3.55 Hz

4.65 Hz

Posted Date:-2021-03-14 21:40:29

## Question: ` Which metal wire is used in the coil of the motor used commercially?`

1.Aluminium

2.Silver

3.Nickel

4.Copper

Posted Date:-2021-03-14 21:40:29

## Question: ` Which of the following are sources of direct current?`

1.Dry cell

2.Car battery

3.D.C. generator

4.All of the above

Posted Date:-2021-03-14 21:40:29

## Question: `If the current reverses direction after equal intervals of time, it is called:`

1.Direct current

2.Alternating current

3.Induced current

4. Ionic current

Posted Date:-2021-03-14 21:40:29

## Question: `In an electric motor, which device reverses the direction of current through a circuit?`

1.Carbon brush

2.Coil

3. Commutator

4.Permanent magnet

Posted Date:-2021-03-14 21:40:29

## Question: `In generators, the voltage produced can be increased by:`

1.Coil with more turns

2.Rotating coil faster

3. Using coil with larger area

4. All of the above

Posted Date:-2021-03-14 21:40:29

## Question: `In which of the following devices is the electrical motor used?`

1.Electric fans

2.Washing machine

3.Refrigerator

4.All of the above

Posted Date:-2021-03-14 21:40:29

## Question: `﻿What is a long coil containing a large number of close turns of insulated copper wire called?`

1. Straight

2. Solenoid

3.Circular loop

4.Stranded

Posted Date:-2021-03-14 21:40:29

## Question: `On what does the strength of magnetic field produced by a current carrying solenoid depend?`

1.Number of turns in solenoid

2.Strength of current

3.Nature of core material

4.All of the above

Posted Date:-2021-03-14 21:40:29

## Question: `Strong permanent magnets are used in:`

1.Microphones

2.Loudspeakers

3.Voltmeters

4. All of the above

Posted Date:-2021-03-14 21:40:29

## Question: `The carbon strips used to pass electric current to the coil are known:`

1.Commutator

2.Magnet

3. Battery

4.Brushes

Posted Date:-2021-03-14 21:40:29

## Question: `The current produced by moving a straight wire in a magnetic field is called:`

1. Direct current

2.Alternating current

3. Induced current

4.Electromagnetism

Posted Date:-2021-03-14 21:40:29

## Question: `The magnetic field lines inside the solenoid are:`

1. Concentrated circles

2.Bigger circles

3.Parallel straight lines

4.None of the above

Posted Date:-2021-03-14 21:40:29

## Question: `The magnetic field produced by a current carrying solenoid is similar to the magnetic field produced by a:`

1.Bar magnet

2.Ring magnet

3.Rod magnet

4.Horse shoe magnet

Posted Date:-2021-03-14 21:40:29

## Question: `The maximum force is exerted on a current carrying conductor when it is:`

1.Perpendicular to magnetic field

2.Parallel to magnetic field

3.Swings in backward direction

4. All of the above

Posted Date:-2021-03-14 21:40:29

## Question: `The process of electromagnetic induction has led to the construction of:`

1.Motors

2.Generators

3.Transformers

4. Switch

Posted Date:-2021-03-14 21:40:29

## Question: `The production of electricity from magnetism is called:`

1.Electromagnetic induction

2.Electromagnetism

3.Electroluminescent wire

4.Electrostatics

Posted Date:-2021-03-14 21:40:29

## Question: `What does the forefinger represent in the Fleming’s left-hand rule?`

1.Magnetic field

2. Current

3.Motion of conductor

4.None of the above

Posted Date:-2021-03-14 21:40:29

## Question: `What is the current flowing in one direction called?`

1.Alternating current

2.Induced current

3.Direct current

4.Ionic current

Posted Date:-2021-03-14 21:40:29

## Question: `What is used to make electromagnets?`

1. Circular wire

2.Solenoid

3.Straight wire

4.Horse shoe magnet

Posted Date:-2021-03-14 21:40:29

## Question: `What needs to be reversed in order to reverse the direction of induced current?`

1.Direction of magnetic field

2.Direction of current

3.Direction of force

4. All of the above

Posted Date:-2021-03-14 21:40:29

## Question: `Which are the two main organs of the human body where the magnetic field produced is significant?`

1.Heart and kidney

2. Lungs and kidney

3. Heart and brain

4.Liver and stomach

Posted Date:-2021-03-14 21:40:29

## Question: `Which device converts electrical energy into mechanical energy?`

1.Motor

2.Generator

3.Windmill

4.Transformer

Posted Date:-2021-03-14 21:40:29

## Question: `Which direction is indicated by the thumb in Fleming’s left-hand rule?`

1.Current

2.Magnetic field

3.Motion of conductor

4.None of the above

Posted Date:-2021-03-14 21:40:29

## Question: `Which effect of current is used in detecting concealed current-carrying conductor in a wall?`

1.Magnetic

2.Heating

3.Chemical

4. Ionic

Posted Date:-2021-03-14 21:40:29

## Question: `Which of the following are the sources for producing alternating current?`

1. Power house generators

2.Bicycle dynamos

3.Car alternators

4.All of the above

Posted Date:-2021-03-14 21:40:29

## Question: `Which of the following convert’s mechanical energy into electrical energy?`

1.Refrigerator

2.Fan

3.Electric motor

4. Electric generator

Posted Date:-2021-03-14 21:40:29

## Question: `Which of the following factors affects the strength of steel?`

1.Number of turns in coil

2.Current flowing in coil

3.Length of air gap between poles

4.All of the above

Posted Date:-2021-03-14 21:40:29

## Question: `Which of the following is not used for making electromagnets?`

1.Carbon steel

2.Alnico

3. Cobalt steel

4.All of the above

Posted Date:-2021-03-14 21:40:29

## Question: `Which of the following parts is not there in A.C. generator?`

1. Slip rings

2.Coil

3.Commutator

4. Galvanometer

Posted Date:-2021-03-14 21:40:29

## Question: `Which of the following parts of the generators is stationary to produce electricity in large powerhouses?`

1.Coil

2.Electromagnet

3.Slip rings

4.Carbon brush

Posted Date:-2021-03-14 21:40:29

## Question: `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?`

1.Maxwell’s right-hand thumb rule

2.Born rule

3.Hall Effect

4.Fleming’s left-hand rule

Posted Date:-2021-03-14 21:40:29

## Question: `Who discovered that when a current carrying conductor is placed in a magnetic field, a mechanical force exerted on the conductor makes it move?`

1. Hans Christian Oersted

3.Benjamin Franklin

4.William Gilbert

Posted Date:-2021-03-14 21:40:29

## Question: `Who discovered the phenomenon of electromagnetic induction?`

2.Albert Einstein

3.Isaac Newton

4.Galileo Galilei

Posted Date:-2021-03-14 21:40:29

## More MCQS

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