03. ELECTRIC FIELD
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Electric Charges and Fields

267753 A charged bead is capable of sliding freely through a string held vertically in tension. An electric field is applied parallel to the string so that the bead stays at rest of the middle of the string. If the electric field is switched off momentarily and switched on

1 the bead moves downwards and stops as soon as the field is switched on
2 the bead moved downwards when the field is switched off and moves upwards when the field is switched on
3 the bead moves downwards with constant acceleration till it reaches the bottom of the string
4 the bead moves downwards with constant velocity till it reaches the bottom of the string
Electric Charges and Fields

267754 An electron is moving with constant velocity along \(x\)-axis. If a uniform electric field is applied along \(y\)-axis, then its path in the \(x-y\) plane will be

1 a straight line
2 a circle
3 a parabola
4 an ellipse
Electric Charges and Fields

267755 An electron of mass \(M_{e}\), initially at rest, moves through a certain distance in a uniform electric field in time \(t_{1}\), proton of mass \(M_{p}\) also initially at rest, takes time \(t_{2}\) to move through an equal distance in this uniform electric field. Neglecting the effect of gravity the ratio \(t_{2} / t_{1}\) is nearly equal to

1 1
2 \(\sqrt{M_{p} / M_{e}}\)
3 \(\sqrt{M_{e} / M_{p}}\)
4 1836
Electric Charges and Fields

267850 Two charges of\(50 \mu \mathrm{C}\) and \(100 \mu \mathrm{C}\) are separated by a distance of \(0.6 \mathrm{~m}\). The intensity of electric field at a point midway between them is

1 \(50 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
2 \(5 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
3 \(10 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
4 \(10 \times 10^{-6} \mathrm{~V} / \mathrm{m}\)
Electric Charges and Fields

267753 A charged bead is capable of sliding freely through a string held vertically in tension. An electric field is applied parallel to the string so that the bead stays at rest of the middle of the string. If the electric field is switched off momentarily and switched on

1 the bead moves downwards and stops as soon as the field is switched on
2 the bead moved downwards when the field is switched off and moves upwards when the field is switched on
3 the bead moves downwards with constant acceleration till it reaches the bottom of the string
4 the bead moves downwards with constant velocity till it reaches the bottom of the string
Electric Charges and Fields

267754 An electron is moving with constant velocity along \(x\)-axis. If a uniform electric field is applied along \(y\)-axis, then its path in the \(x-y\) plane will be

1 a straight line
2 a circle
3 a parabola
4 an ellipse
Electric Charges and Fields

267755 An electron of mass \(M_{e}\), initially at rest, moves through a certain distance in a uniform electric field in time \(t_{1}\), proton of mass \(M_{p}\) also initially at rest, takes time \(t_{2}\) to move through an equal distance in this uniform electric field. Neglecting the effect of gravity the ratio \(t_{2} / t_{1}\) is nearly equal to

1 1
2 \(\sqrt{M_{p} / M_{e}}\)
3 \(\sqrt{M_{e} / M_{p}}\)
4 1836
Electric Charges and Fields

267850 Two charges of\(50 \mu \mathrm{C}\) and \(100 \mu \mathrm{C}\) are separated by a distance of \(0.6 \mathrm{~m}\). The intensity of electric field at a point midway between them is

1 \(50 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
2 \(5 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
3 \(10 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
4 \(10 \times 10^{-6} \mathrm{~V} / \mathrm{m}\)
Electric Charges and Fields

267753 A charged bead is capable of sliding freely through a string held vertically in tension. An electric field is applied parallel to the string so that the bead stays at rest of the middle of the string. If the electric field is switched off momentarily and switched on

1 the bead moves downwards and stops as soon as the field is switched on
2 the bead moved downwards when the field is switched off and moves upwards when the field is switched on
3 the bead moves downwards with constant acceleration till it reaches the bottom of the string
4 the bead moves downwards with constant velocity till it reaches the bottom of the string
Electric Charges and Fields

267754 An electron is moving with constant velocity along \(x\)-axis. If a uniform electric field is applied along \(y\)-axis, then its path in the \(x-y\) plane will be

1 a straight line
2 a circle
3 a parabola
4 an ellipse
Electric Charges and Fields

267755 An electron of mass \(M_{e}\), initially at rest, moves through a certain distance in a uniform electric field in time \(t_{1}\), proton of mass \(M_{p}\) also initially at rest, takes time \(t_{2}\) to move through an equal distance in this uniform electric field. Neglecting the effect of gravity the ratio \(t_{2} / t_{1}\) is nearly equal to

1 1
2 \(\sqrt{M_{p} / M_{e}}\)
3 \(\sqrt{M_{e} / M_{p}}\)
4 1836
Electric Charges and Fields

267850 Two charges of\(50 \mu \mathrm{C}\) and \(100 \mu \mathrm{C}\) are separated by a distance of \(0.6 \mathrm{~m}\). The intensity of electric field at a point midway between them is

1 \(50 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
2 \(5 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
3 \(10 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
4 \(10 \times 10^{-6} \mathrm{~V} / \mathrm{m}\)
Electric Charges and Fields

267753 A charged bead is capable of sliding freely through a string held vertically in tension. An electric field is applied parallel to the string so that the bead stays at rest of the middle of the string. If the electric field is switched off momentarily and switched on

1 the bead moves downwards and stops as soon as the field is switched on
2 the bead moved downwards when the field is switched off and moves upwards when the field is switched on
3 the bead moves downwards with constant acceleration till it reaches the bottom of the string
4 the bead moves downwards with constant velocity till it reaches the bottom of the string
Electric Charges and Fields

267754 An electron is moving with constant velocity along \(x\)-axis. If a uniform electric field is applied along \(y\)-axis, then its path in the \(x-y\) plane will be

1 a straight line
2 a circle
3 a parabola
4 an ellipse
Electric Charges and Fields

267755 An electron of mass \(M_{e}\), initially at rest, moves through a certain distance in a uniform electric field in time \(t_{1}\), proton of mass \(M_{p}\) also initially at rest, takes time \(t_{2}\) to move through an equal distance in this uniform electric field. Neglecting the effect of gravity the ratio \(t_{2} / t_{1}\) is nearly equal to

1 1
2 \(\sqrt{M_{p} / M_{e}}\)
3 \(\sqrt{M_{e} / M_{p}}\)
4 1836
Electric Charges and Fields

267850 Two charges of\(50 \mu \mathrm{C}\) and \(100 \mu \mathrm{C}\) are separated by a distance of \(0.6 \mathrm{~m}\). The intensity of electric field at a point midway between them is

1 \(50 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
2 \(5 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
3 \(10 \times 10^{6} \mathrm{~V} / \mathrm{m}\)
4 \(10 \times 10^{-6} \mathrm{~V} / \mathrm{m}\)