The Experiments of Faraday and Henry
PHXII06:ELECTROMAGNETIC INDUCTION

358628 A coil is placed perpendicular to a magnetic field of \(5000\,T.\) When the field is changed to \(3000\,T\) in \(2\,s,\) an induced emf of \(22\,V\) is produced in the coil. If the diameter of the coil is \(0.02\,m,\) then the number of turns in the coil is

1 140
2 7
3 35
4 70
PHXII06:ELECTROMAGNETIC INDUCTION

358629 A coil of area \(0.4 m^{2}\) has 100 turns. A magnetic field of \(0.04\;\,Wb{m^{ - 2}}\) is acting normal to the coil surface. If this magnetic field is reduced to zero in \(0.01\,\;s\), then the induced emf in the coil is

1 \(160\;\,V\)
2 \(250\,\;V\)
3 \(270\;\,V\)
4 \(320\;\,V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358630 The magnetic flux linked with a coil varies as \(\mathrm{f}=3 \mathrm{t}^{2}+4 \mathrm{t}+9\). The magnitude of the emf induced at \(\mathrm{t}=2\) seconds in

1 \(8\,\;V\)
2 \(16\,\;V\)
3 \(32\;\,V\)
4 \(64\,\;V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358631 Magnetic flux \(\phi\) (in weber) linked with a closed circuit of resistance \(10 \Omega\) varies with time \(t\) (in seconds) as \(\phi=5 t^{2}-4 t+1\). The induced electromotive force in the circuit at \(t = 0.2\;s\)

1 -0.4 volts
2 0.4 volts
3 2.0 volts
4 -2.0 volts
PHXII06:ELECTROMAGNETIC INDUCTION

358628 A coil is placed perpendicular to a magnetic field of \(5000\,T.\) When the field is changed to \(3000\,T\) in \(2\,s,\) an induced emf of \(22\,V\) is produced in the coil. If the diameter of the coil is \(0.02\,m,\) then the number of turns in the coil is

1 140
2 7
3 35
4 70
PHXII06:ELECTROMAGNETIC INDUCTION

358629 A coil of area \(0.4 m^{2}\) has 100 turns. A magnetic field of \(0.04\;\,Wb{m^{ - 2}}\) is acting normal to the coil surface. If this magnetic field is reduced to zero in \(0.01\,\;s\), then the induced emf in the coil is

1 \(160\;\,V\)
2 \(250\,\;V\)
3 \(270\;\,V\)
4 \(320\;\,V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358630 The magnetic flux linked with a coil varies as \(\mathrm{f}=3 \mathrm{t}^{2}+4 \mathrm{t}+9\). The magnitude of the emf induced at \(\mathrm{t}=2\) seconds in

1 \(8\,\;V\)
2 \(16\,\;V\)
3 \(32\;\,V\)
4 \(64\,\;V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358631 Magnetic flux \(\phi\) (in weber) linked with a closed circuit of resistance \(10 \Omega\) varies with time \(t\) (in seconds) as \(\phi=5 t^{2}-4 t+1\). The induced electromotive force in the circuit at \(t = 0.2\;s\)

1 -0.4 volts
2 0.4 volts
3 2.0 volts
4 -2.0 volts
PHXII06:ELECTROMAGNETIC INDUCTION

358628 A coil is placed perpendicular to a magnetic field of \(5000\,T.\) When the field is changed to \(3000\,T\) in \(2\,s,\) an induced emf of \(22\,V\) is produced in the coil. If the diameter of the coil is \(0.02\,m,\) then the number of turns in the coil is

1 140
2 7
3 35
4 70
PHXII06:ELECTROMAGNETIC INDUCTION

358629 A coil of area \(0.4 m^{2}\) has 100 turns. A magnetic field of \(0.04\;\,Wb{m^{ - 2}}\) is acting normal to the coil surface. If this magnetic field is reduced to zero in \(0.01\,\;s\), then the induced emf in the coil is

1 \(160\;\,V\)
2 \(250\,\;V\)
3 \(270\;\,V\)
4 \(320\;\,V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358630 The magnetic flux linked with a coil varies as \(\mathrm{f}=3 \mathrm{t}^{2}+4 \mathrm{t}+9\). The magnitude of the emf induced at \(\mathrm{t}=2\) seconds in

1 \(8\,\;V\)
2 \(16\,\;V\)
3 \(32\;\,V\)
4 \(64\,\;V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358631 Magnetic flux \(\phi\) (in weber) linked with a closed circuit of resistance \(10 \Omega\) varies with time \(t\) (in seconds) as \(\phi=5 t^{2}-4 t+1\). The induced electromotive force in the circuit at \(t = 0.2\;s\)

1 -0.4 volts
2 0.4 volts
3 2.0 volts
4 -2.0 volts
PHXII06:ELECTROMAGNETIC INDUCTION

358628 A coil is placed perpendicular to a magnetic field of \(5000\,T.\) When the field is changed to \(3000\,T\) in \(2\,s,\) an induced emf of \(22\,V\) is produced in the coil. If the diameter of the coil is \(0.02\,m,\) then the number of turns in the coil is

1 140
2 7
3 35
4 70
PHXII06:ELECTROMAGNETIC INDUCTION

358629 A coil of area \(0.4 m^{2}\) has 100 turns. A magnetic field of \(0.04\;\,Wb{m^{ - 2}}\) is acting normal to the coil surface. If this magnetic field is reduced to zero in \(0.01\,\;s\), then the induced emf in the coil is

1 \(160\;\,V\)
2 \(250\,\;V\)
3 \(270\;\,V\)
4 \(320\;\,V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358630 The magnetic flux linked with a coil varies as \(\mathrm{f}=3 \mathrm{t}^{2}+4 \mathrm{t}+9\). The magnitude of the emf induced at \(\mathrm{t}=2\) seconds in

1 \(8\,\;V\)
2 \(16\,\;V\)
3 \(32\;\,V\)
4 \(64\,\;V\)
PHXII06:ELECTROMAGNETIC INDUCTION

358631 Magnetic flux \(\phi\) (in weber) linked with a closed circuit of resistance \(10 \Omega\) varies with time \(t\) (in seconds) as \(\phi=5 t^{2}-4 t+1\). The induced electromotive force in the circuit at \(t = 0.2\;s\)

1 -0.4 volts
2 0.4 volts
3 2.0 volts
4 -2.0 volts