Electricity and Magnetism

Total Questions: 16

1 - An electric circuit is the path along which:
A ) Electrons revolve around the nucleus of an atom
B ) Electric charge flows ✅
C ) Magnetic lines of force move
D ) Electric motors move

2 - A closed circuit is the:
A ) Complete path of electric current ✅
B ) Incomplete path of electric current
C ) Broken path of electric current
D ) None of the above

3 - Which of the following is non-magnetic substance?
A ) Iron
B ) Steel
C ) Silver ✅
D ) Nickel

4 - Which of the following is a magnetic substance?
A ) Glass
B ) Marble
C ) Gold
D ) Cobalt ✅

5 - The best material to be used as a core in the coils for making electromagnet is:
A ) Rubber
B ) Plastic
C ) Steel
D ) Soft iron ✅

6 - An electric current in a conductor is due to the flow of:
A ) Positive ions
B ) Negative ions
C ) Positive charges
D ) Free electrons ✅

7 - The rate of flow of charges is called:
A ) Current ✅
B ) Volt
C ) Ohm
D ) Coulomb

8 - The formula to find the magnitude of current is:
A ) I= Q/t ✅
B ) I= QV
C ) I=CV
D ) I=C/Q

9 - One ampere is equal to:
A ) 100mA
B ) 10mA
C ) 1000mA ✅
D ) 10000mA

10 - The SI unit of voltage is:
A ) Watt
B ) Joule
C ) Coulomb
D ) Volt ✅

11 - Mathematical form of Ohm's law:
A ) V=I/R
B ) V=R/I
C ) V=IR ✅
D ) V=m/R

12 - Unit of resistance is:
A ) Ampere
B ) Volt
C ) Ohm ✅
D ) Farad

13 - The relation R= V/I is discovered by a:
A ) American scientist
B ) German scientist ✅
C ) British scientist
D ) Russian scientist

14 - The unit of electric power is:
A ) Watt ✅
B ) Ampere
C ) Joule
D ) Volt

15 - A Microphone converts mechanical wave energy into:
A ) Audio signals ✅
B ) Video signals
C ) Audio and video signals
D ) None of these

16 - Who was the first which explore the electromagnetic effect?
A ) Micheal faraday
B ) George Simon Ohm ✅
C ) Coulomb
D ) Hans Oested
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